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General Category => General Discussion => Topic started by: PiBoSo on February 05, 2015, 05:08:05 PM

Title: Parts weight
Post by: PiBoSo on February 05, 2015, 05:08:05 PM
While waiting for MX Bikes to be more refined and contact manufacturers for a collaboration, we need some data to improve realism.

Does anyone know the weight of the swingarm of a MX bike? Or the weight of the front forks + handlebar + springs + dampers + oil?
Even a rough estimate would be of great help, thank you.
Hopefully someone has some spare parts around to weight  :)
Title: Re: Parts weight
Post by: PizzaChet on February 05, 2015, 06:41:40 PM
Quote from: PiBoSo on February 05, 2015, 05:08:05 PMOr the weight of the...oil?
"... per gallon. Oil is 6.84 lbs."
Title: Re: Parts weight
Post by: Phathry25 on February 05, 2015, 08:57:58 PM
I could go through my bike at let you know. Have been meaning to anyways. Is that all you're looking for?  Or everything?
Title: Re: Parts weight
Post by: PiBoSo on February 05, 2015, 09:29:24 PM
Quote from: Phathry25 on February 05, 2015, 08:57:58 PM
I could go through my bike at let you know. Have been meaning to anyways. Is that all you're looking for?  Or everything?

Thank you.
The more the better  :)
Title: Re: Parts weight
Post by: motopsycho87 on February 05, 2015, 09:31:45 PM
I don't have anything particularly accurate at home to measure with, but;

CBR600F1 rear shock, inc oil and spring, non piggyback type read 3.3kg. It is fatter than the shock on my dirt bike, but not as long, and the dirt bike has piggyback reservoir. So shouldn't be too far off...  :o

GasGas EC300 Fork springs (0.46 & 0.48 combined as a 0.47 pair) weighed roughly 1kg (as pair).

I used 630ml (approx) oil (dexron 6, equiv to 7.5wt) in my forks after last rebuild to get 110mm height. Datasheet states density of 0.848g/cm^3, so 0.848*625=534g per fork leg.
(Manual states 610ml for 90mm air gap, doesn't make sense that less is more, but I assume 610ml takes you to the bottom of the adjustable range, and 90 is factory standard... or I measured wrong...).
Title: Re: Parts weight
Post by: motopsycho87 on February 05, 2015, 09:41:24 PM
Ok, I've put in the information of my spring into this calculator and it assumes the weight of each spring to be approx 0.543kg, which coincides with my 'roughly 1kg' measurement.

http://www.acxesspring.com/spring-calculator.html

  Spring Rate (or Spring constant), k :   4.813 N/mm
  Diameter of spring wire, d:   5.000 mm
  Outer diameter of spring, Douter :   40.000 mm
  Free length of spring, Lfree :   475.000 mm
  Number of active coils, na :   30
  Number of total coils, nT :   32

These are springs fitted to a GasGas EC300 2 stroke 2006 model with Marzocchi Shiver 45 forks. Just measured the diameter and counted the coils on the 0.48.

Excerpt from Marzocchi Shiver owners manual re: spring rates.
(http://s9.postimg.org/vd8oqb4an/springs.png)

Overall complete bike with handlebar brush guards, sump plate, heavy mx tyres, full tank of fuel and with oils weighed at approx 120kg.
Title: Re: Parts weight
Post by: motopsycho87 on February 05, 2015, 10:01:04 PM
Pro taper state their MX handlebars weigh 975g, though these are adjustable stiffness?

http://www.protaper.com/products/handlebars/fuzion

Hope this all helps!
Title: Re: Parts weight
Post by: PiBoSo on February 07, 2015, 04:16:46 PM
Bump!

Anyone with a spare swingarm or forks + handlebars to weight?
Title: Re: Parts weight
Post by: GDUBMX on February 07, 2015, 07:07:41 PM
Renthal Carmichael bend twinwall bars weigh 1.3kg
Title: Re: Parts weight
Post by: 22Ryann on February 08, 2015, 09:57:49 AM
I can probably get you stock 2015 KX250f header pipe and silencer weights if that is useful to you PiBoSo??
Title: Re: Parts weight
Post by: PiBoSo on February 08, 2015, 12:00:45 PM
Quote from: 22Ryann on February 08, 2015, 09:57:49 AM
I can probably get you stock 2015 KX250f header pipe and silencer weights if that is useful to you PiBoSo??

It wouldn't be of much use, unfortunately. Thank you anyway.
Now that springs, oil and bars weight is known, if would be great to know the weight of forks + triple clamps, and of course dampers.
It would also be extremely useful to know the weight of the front fender and number plate.
Title: Re: Parts weight
Post by: 22Ryann on February 08, 2015, 12:59:40 PM
I believe i still have stock 2011 triple clamps here for a KX250f? Maybe also fender and plate, ill check it out tomorrow.
Title: Re: Parts weight
Post by: GDUBMX on February 08, 2015, 02:48:47 PM
Quote from: geofanatec on February 08, 2015, 02:42:36 PM
Just a thought, I don't have time to do it though.

Couldn't you get on a stock parts site, pick the bike you want, then add whatever part to the cart, then calculate shipping (look at estimated weight), and repeat, lol.

Just a thought.

lmao genius! :)
Title: Re: Parts weight
Post by: PiBoSo on February 08, 2015, 04:14:49 PM
Quote from: geofanatec on February 08, 2015, 02:42:36 PM
Just a thought, I don't have time to do it though.

Couldn't you get on a stock parts site, pick the bike you want, then add whatever part to the cart, then calculate shipping (look at estimated weight), and repeat, lol.

Just a thought.

Do you know a good website that sells stock parts?
It probably wouldn't be very accurate, though, because of the packaging.
But maybe they already list the weights.
Title: Re: Parts weight
Post by: motopsycho87 on February 08, 2015, 09:54:44 PM
I've never come across a dealer that calculates postage by weight, normally a set price from 1g to 20kg.

I'd imagine those bars I listed are heavier than normal as they are adjustable stiffness, but not by much.

Front muddy I'd estimate at between 400 and 600 grams, number board probably 200 to 300. Couldn't really guess the forks as a whole tbh  :-[

Good luck, :D can't wait to play the new beta
Title: Re: Parts weight
Post by: PiBoSo on February 08, 2015, 10:17:00 PM
Quote from: geofanatec on February 08, 2015, 10:10:49 PM
Lastly, If I had to guesstimate (which I am fairly good at):

Total weight of KTM 350 is 233 lbs or 105.6 kg

If I had to guess:

Front End (tire, forks, triple clamps, handlebars, etc...) around: 48 lbs or 21.8 kg
Middle (seat, fuel tank (empty), engine, frame, footpegs, etc...) around: 123 lbs or 55.7 kg
Rear (rear fender, swingarm, chain, rear tire, etc...) around: 62 lbs or 28.1 kg

This sounds like 12 pounds too much, that should probably be added to the front.
Title: Re: Parts weight
Post by: MXK_cdub85 on February 09, 2015, 01:05:03 AM
Idk geo, that sounds like a tank to me. My rear swingarm on my 2015 kx450 with linkage, bearings, chain guides/rollers, axle blocks weighs 17.74 lbs. Rear wheel fully assembled with a Dunlop mx52 weighs 28lbs. Subframe/rear fender/air box weighs considerably less then the swingarm. Not quite sure. Those were just weighed as of this afternoon during a tear down.
Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 01:52:12 AM
Quote from: MXK_cdub85 on February 09, 2015, 01:05:03 AM
Idk geo, that sounds like a tank to me. My rear swingarm on my 2015 kx450 with linkage, bearings, chain guides/rollers, axle blocks weighs 17.74 lbs. Rear wheel fully assembled with a Dunlop mx52 weighs 28lbs. Subframe/rear fender/air box weighs considerably less then the swingarm. Not quite sure. Those were just weighed as of this afternoon during a tear down.

Thank you. Very interesting data.
The swingarm weight is very close to the value currently in MX Bikes beta3: 8kg.
The rear wheel is heavier than expected. Does it include the brake disc and rear sprocket, too, or just rim + tyre?
Title: Re: Parts weight
Post by: MXK_cdub85 on February 09, 2015, 04:32:29 AM
Sorry for the late reply. I noticed I had a mistake.  I re-weighed it just now. The rear wheel assembly, includes a Dunlop MX52 120/80-19, D.I.D dirt star rim 2.15 width , titanium spokes/nipples, aluminum renthal sprocket, titanium axle left in it, Braking steel wave rotor. All of it combined (including Ti Axle) comes to 21.93lbs

I also weighed a spare rear rim, the Same DID dirt star ltx by itself, ie no spokes or hub, it was 6.37lbs. Assembled with only rim, spokes, rub, aluminum rim lock was 8.4lbs.

Dunlop mx52 by itself weighed exactly 12lbs.

Subframe with air box assembly and mudflap was 5.77lbs

Rear fender alone is 1.11 lbs
Front fender alone is 13.16 oz
Front number plate with cable guide is 11.23 oz

Geo, wasn't meaning to offend or dismiss you buddy.
I was under the impression Piboso already had the exhaust and header weight accounted for.

Hope this can be of some help. If you need anything else just ask and I'll do my best.

edit: so as luck would have it, I'm at a friends house right now who owns a 2013 KTM 450SXF. We weighed his front/rear fenders and front number plate.

Front fender no graphics: 13.9oz
Rear fender no graphics: 1.31lbs
Front # plate: 10.9oz
Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 11:20:00 AM
Quote from: MXK_cdub85 on February 09, 2015, 04:32:29 AM
Sorry for the late reply. I noticed I had a mistake.  I re-weighed it just now. The rear wheel assembly, includes a Dunlop MX52 120/80-19, D.I.D dirt star rim 2.15 width , titanium spokes/nipples, aluminum renthal sprocket, titanium axle left in it, Braking steel wave rotor. All of it combined (including Ti Axle) comes to 21.93lbs

I also weighed a spare rear rim, the Same DID dirt star ltx by itself, ie no spokes or hub, it was 6.37lbs. Assembled with only rim, spokes, rub, aluminum rim lock was 8.4lbs.

Dunlop mx52 by itself weighed exactly 12lbs.

Subframe with air box assembly and mudflap was 5.77lbs

Rear fender alone is 1.11 lbs
Front fender alone is 13.16 oz
Front number plate with cable guide is 11.23 oz

Geo, wasn't meaning to offend or dismiss you buddy.
I was under the impression Piboso already had the exhaust and header weight accounted for.

Hope this can be of some help. If you need anything else just ask and I'll do my best.

edit: so as luck would have it, I'm at a friends house right now who owns a 2013 KTM 450SXF. We weighed his front/rear fenders and front number plate.

Front fender no graphics: 13.9oz
Rear fender no graphics: 1.31lbs
Front # plate: 10.9oz

Thank you very much!
This is gold!
http://www.youtube.com/v/CF7OnW4XDck

Now all is missing is:
- forks
- triple clamps
- front wheel

Anyone?  :P
Title: Re: Parts weight
Post by: al167 on February 09, 2015, 01:06:57 PM
rear end unsprung mass:
would it be more accurate to just remove the rear shock lower bolt and with the bike on a center stand let the rear wheel drop down onto some scales? this would give actual unsprung mass at point of contact of wheel. allowing for chain, calliper position ect (I can do this if required but my bikes a bit old 2006 crf450r) would be very close still!

for the front forks:
also id assume the lower portion of the fork, fork guards, calliper and axel is counted as unsprung weight? id guess 50% of fork mass for the lower portion. but the forks really need to be disassembled for accurate weighting(sorry not going to do this, maybe someones doing some seals at the moment??). also my forks are the older spring type that are  about1kg heavier than the new psd pneumatic forks that come on most of the bikes from 2013 on (springless).
ill see what I can manage, here too, but I wont be able to do it until the weekend...

wheels
I can see how you need the masses for the wheels for gyroscopic forces. separating masses of hub, tire, rim for calculations may be needed here?

good luck with it piboso!


Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 02:58:32 PM
Quote from: al167 on February 09, 2015, 01:06:57 PM
wheels
I can see how you need the masses for the wheels for gyroscopic forces. separating masses of hub, tire, rim for calculations may be needed here?

Wheels mass and inertia must be accurate for gyroscopic forces, but also to make the suspensions and jumps work correctly.
Hub, spokes, rim and tire mass can be derived from the total mass, because proportions should be more or less constant.
Title: Re: Parts weight
Post by: teeds on February 09, 2015, 04:55:27 PM
Not sure exactly how close this will be or how far off someone might be to tearing down the front end of an actual MX bike, but I have just weighed a set of USD forks/clamps from a road bike. I was looking at the forks on my MX bike for comparison and these seem thicker, but shorter so figured it's pretty similar. They're did have oil in during weighing and came in at 9.3kg, you could take off nearly 1kg if you consider the new type of lighter air forks. HTH
Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 05:27:19 PM
Quote from: teeds on February 09, 2015, 04:55:27 PM
Not sure exactly how close this will be or how far off someone might be to tearing down the front end of an actual MX bike, but I have just weighed a set of USD forks/clamps from a road bike. I was looking at the forks on my MX bike for comparison and these seem thicker, but shorter so figured it's pretty similar. They're did have oil in during weighing and came in at 9.3kg, you could take off nearly 1kg if you consider the new type of lighter air forks. HTH

Thank you.
Did the forks include springs and dampers?
Title: Re: Parts weight
Post by: teeds on February 09, 2015, 05:57:56 PM
Yes the forks are fully working with triple clamps but otherwise stripped, so no callipers or axle etc.
Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 06:12:47 PM
Quote from: teeds on February 09, 2015, 05:57:56 PM
Yes the forks are fully working with triple clamps but otherwise stripped, so no callipers or axle etc.

What kind of bike is that, just to make a comparison?
Title: Re: Parts weight
Post by: motopsycho87 on February 09, 2015, 06:14:44 PM
Just remember that manufacturers all lie about weights and powers. Only trust impartial measurements  :)
Title: Re: Parts weight
Post by: teeds on February 09, 2015, 06:21:50 PM
Quote from: PiBoSo on February 09, 2015, 06:12:47 PM
Quote from: teeds on February 09, 2015, 05:57:56 PM
Yes the forks are fully working with triple clamps but otherwise stripped, so no callipers or axle etc.

What kind of bike is that, just to make a comparison?

Forks are from a GSXR-750 WW
Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 07:27:25 PM
Quote from: teeds on February 09, 2015, 06:21:50 PM
Quote from: PiBoSo on February 09, 2015, 06:12:47 PM
Quote from: teeds on February 09, 2015, 05:57:56 PM
Yes the forks are fully working with triple clamps but otherwise stripped, so no callipers or axle etc.

What kind of bike is that, just to make a comparison?

Forks are from a GSXR-750 WW

Thank you very much.
This is an eye opener for GP Bikes, too  :)
Title: Re: Parts weight
Post by: Phathry25 on February 09, 2015, 11:26:25 PM
Got everything torn down. Then realized I had no way of weighing everything. Might go after a bathroom scale and just hold the stuff while standing on it. Should be close enough, no?
Title: Re: Parts weight
Post by: PiBoSo on February 09, 2015, 11:56:29 PM
Quote from: Phathry25 on February 09, 2015, 11:26:25 PM
Got everything torn down. Then realized I had no way of weighing everything. Might go after a bathroom scale and just hold the stuff while standing on it. Should be close enough, no?

Sure, that would be great, thank you!
Title: Re: Parts weight
Post by: MXK_cdub85 on February 10, 2015, 12:00:39 AM
Hey Piboso, I wanted to give you a quick update/heads up on some of the weight figures I gave last night. I ended up getting a front and rear rim, just the rim, from my friend last night off of his 2013 KTM 450SXF. I brought them to work and weighed them on a much more accurate scale. So the front rim is going to be 1590 Grams/3.50lbs. The rear is 1880 Grams/4.14lbs. I also brought in the forks off of the same bike and weighed them. They are filled with oil and have titanium springs. The left side with the caliper bracket weighed 4445.21 Grams/9.8lbs. The right side weighed 4411.21 Grams/9.72lbs.

I also brought a brand new, non O-ring DID chain. It is the DID ERT2 Gold. It was 1356.241Grams/2.99lbs

I will have data for a set of my billet aluminum X-Trig Triple clamps asap as well as better data on a full set of front and rear wheel assemblies.  Ill try and get any other weights you'll need as well. Appreciate all of your hard work.

edit: oops I may have pm'd you this same info Piboso. I started typing it up on my phone and wires got crossed somewhere lol.
Title: Re: Parts weight
Post by: arnzzz on February 10, 2015, 12:47:09 AM
Quote from: MXK_cdub85 on February 10, 2015, 12:00:39 AM
Hey Piboso, I wanted to give you a quick update/heads up on some of the weight figures I gave last night. I ended up getting a front and rear rim, just the rim, from my friend last night off of his 2013 KTM 450SXF. I brought them to work and weighed them on a much more accurate scale. So the front rim is going to be 1590 Grams/3.50lbs. The rear is 1880 Grams/4.14lbs. I also brought in the forks off of the same bike and weighed them. They are filled with oil and have titanium springs. The left side with the caliper bracket weighed 4445.21 Grams/9.8lbs. The right side weighed 4411.21 Grams/9.72lbs.

I also brought a brand new, non O-ring DID chain. It is the DID ERT2 Gold. It was 1356.241Grams/2.99lbs

I will have data for a set of my billet aluminum X-Trig Triple clamps asap as well as better data on a full set of front and rear wheel assemblies.  Ill try and get any other weights you'll need as well. Appreciate all of your hard work.

edit: oops I may have pm'd you this same info Piboso. I started typing it up on my phone and wires got crossed somewhere lol.

WOW, thanks for getting all this data for Piboso :)

This can only mean a better sim for all of us at the end of things :)
Title: Re: Parts weight
Post by: MXK_cdub85 on February 10, 2015, 01:19:10 AM
Quote from: arnzzz on February 10, 2015, 12:47:09 AMWOW, thanks for getting all this data for Piboso :)

This can only mean a better sim for all of us at the end of things :)

It makes it a lot easier to get this info when I am deep in the industry and have many contacts from all sides too, so it's really my pleasure to be able to provide what info I can. Its not too often we have a dev making a motocross sim, let alone be so involved with the community and give/receive feedback so freely! I cant wait to see how this thing looks a year from now!
Title: Re: Parts weight
Post by: PiBoSo on February 10, 2015, 12:30:32 PM
Quote from: MXK_cdub85 on February 10, 2015, 12:00:39 AM
Hey Piboso, I wanted to give you a quick update/heads up on some of the weight figures I gave last night. I ended up getting a front and rear rim, just the rim, from my friend last night off of his 2013 KTM 450SXF. I brought them to work and weighed them on a much more accurate scale. So the front rim is going to be 1590 Grams/3.50lbs. The rear is 1880 Grams/4.14lbs. I also brought in the forks off of the same bike and weighed them. They are filled with oil and have titanium springs. The left side with the caliper bracket weighed 4445.21 Grams/9.8lbs. The right side weighed 4411.21 Grams/9.72lbs.

I also brought a brand new, non O-ring DID chain. It is the DID ERT2 Gold. It was 1356.241Grams/2.99lbs

I will have data for a set of my billet aluminum X-Trig Triple clamps asap as well as better data on a full set of front and rear wheel assemblies.  Ill try and get any other weights you'll need as well. Appreciate all of your hard work.

edit: oops I may have pm'd you this same info Piboso. I started typing it up on my phone and wires got crossed somewhere lol.

Thank you very much.
Title: Re: Parts weight
Post by: PiBoSo on February 10, 2015, 02:09:43 PM
Now that ideas about masses are much more clear, maybe someone can shed some light on weight distribution.
At the moment in MX Bikes it is around 53.5 / 46.5 without the rider, and 50 / 50 with it sitting neutral, both with full fuel tank.
Is it correct?
Title: Re: Parts weight
Post by: teeds on February 10, 2015, 02:37:57 PM
Seems to be generally rearward bias, good real info here for MX and GP -

http://www.thumpertalk.com/topic/874619-front-vs-rear-weight-bias/  (http://www.thumpertalk.com/topic/874619-front-vs-rear-weight-bias/)
Title: Re: Parts weight
Post by: 22Ryann on February 11, 2015, 09:08:31 AM
PiBoSo,

I looked this afternoon for these triple clamps and couldn't find them :( ill check the other shed when i get a chance.

Ryann,
Title: Re: Parts weight
Post by: PiBoSo on February 11, 2015, 10:57:16 AM
Quote from: geofanatec on February 11, 2015, 01:35:39 AM
Quote from: PiBoSo on February 10, 2015, 02:09:43 PM
Now that ideas about masses are much more clear, maybe someone can shed some light on weight distribution.
At the moment in MX Bikes it is around 53.5 / 46.5 without the rider, and 50 / 50 with it sitting neutral, both with full fuel tank.
Is it correct?

Seriously.....I just gave u rear, mid, and front guesstimate

Which have so far proven to be very very close.

The math is simple from there

Thank you for your estimates, they were close indeed, but for development it's better to start with hard numbers and then approximate where needed, then start with already guessed values, to keep the final error down.
Title: Re: Parts weight
Post by: al167 on February 11, 2015, 12:07:14 PM
I will weight my crf450 this weekend, with bathroom scales under rear wheel first, then under front. sound ok?
Title: Re: Parts weight
Post by: PiBoSo on February 11, 2015, 12:36:14 PM
Quote from: al167 on February 11, 2015, 12:07:14 PM
I will weight my crf450 this weekend, with bathroom scales under rear wheel first, then under front. sound ok?

Sounds great, thank you!
Title: Re: Parts weight
Post by: arnzzz on February 12, 2015, 08:10:24 PM
Quote from: al167 on February 11, 2015, 12:07:14 PM
I will weight my crf450 this weekend, with bathroom scales under rear wheel first, then under front. sound ok?

Make sure to take all your clothes off on the bathroom scales... Ive heard that helps :)
Title: Re: Parts weight
Post by: al167 on February 15, 2015, 01:50:59 PM
ok did some tests, striping bike down at moment to fix blown gearbox, so I got some more weights too!!
I did every test three times to eliminate errors.( but just using bathroom scales)

2006 CRF weight:

completely full tank of fuel:

Just Rear wheel of bike sitting on scales 60.9 kg
Just Front wheel of bike sitting on scales 54.1 kg


completely empty tank of fuel:

Just Rear wheel of bike sitting on scales 56.0 kg
Just Front wheel of bike sitting on scales 51.3 kg

complete front wheel with disc, tyre ect. (no axel or spacers) 7.8 kg

complete Rear wheel with disc, sprocket tyre ect. (no axel or spacers) 11.7 kg

swingarm, with chain guides - 4.0 kg

engine (without carby and exaust) 28.9 kg

unsprung rear end weight - 3.5 kg (I made a video of how I did this https://www.youtube.com/watch?v=G70xyf5DjnQ&feature=youtu.be)
(https://www.youtube.com/watch?v=G70xyf5DjnQ&feature=youtu.be))

cheers Allan
Title: Re: Parts weight
Post by: PiBoSo on February 15, 2015, 04:04:35 PM
Quote from: al167 on February 15, 2015, 01:50:59 PM
ok did some tests, striping bike down at moment to fix blown gearbox, so I got some more weights too!!
I did every test three times to eliminate errors.( but just using bathroom scales)

2006 CRF weight:

completely full tank of fuel:

Just Rear wheel of bike sitting on scales 60.9 kg
Just Front wheel of bike sitting on scales 54.1 kg


completely empty tank of fuel:

Just Rear wheel of bike sitting on scales 56.0 kg
Just Front wheel of bike sitting on scales 51.3 kg

complete front wheel with disc, tyre ect. (no axel or spacers) 7.8 kg

complete Rear wheel with disc, sprocket tyre ect. (no axel or spacers) 11.7 kg

swingarm, with chain guides - 4.0 kg

engine (without carby and exaust) 28.9 kg

unsprung rear end weight - 3.5 kg (I made a video of how I did this https://www.youtube.com/watch?v=G70xyf5DjnQ&feature=youtu.be)
(https://www.youtube.com/watch?v=G70xyf5DjnQ&feature=youtu.be))

cheers Allan

Thank you very much.
Weight distribution is surprising: it seems to be all to the back.
Title: Re: Parts weight
Post by: JoonaT on February 16, 2015, 09:23:30 PM
Say if you need info about 125cc/250cc two-stroker!
I have Ktm Exc 250 and 125 Kawi.

- Joona
Title: Re: Parts weight
Post by: PiBoSo on February 16, 2015, 09:36:44 PM
Quote from: JoonaT on February 16, 2015, 09:23:30 PM
Say if you need info about 125cc/250cc two-stroker!
I have Ktm Exc 250 and 125 Kawi.

- Joona

Sure, thank you.
Any data is welcome.
Title: Re: Parts weight
Post by: grimm on March 01, 2016, 08:05:18 AM
I deal with so much bike stuff regularly I totally forgot this was needed! I'll get to weighing parts asap, and get a front/back weight on my '99 YZ400F (beginning of the four stroke MX machine). I think I could also pull it apart to whatever degree you want in order to get accurate weights on seperate parts or assemblies as they are. I have to rebuild the top end, and it's getting pretty tired, time to sort it all out before summer arrives. I'll post it up or send a PM when I get to it, didn't mean to totally forgot.  :-[
Title: Re: Parts weight
Post by: PiBoSo on March 01, 2016, 12:28:43 PM
Quote from: grimm on March 01, 2016, 08:05:18 AM
I deal with so much bike stuff regularly I totally forgot this was needed! I'll get to weighing parts asap, and get a front/back weight on my '99 YZ400F (beginning of the four stroke MX machine). I think I could also pull it apart to whatever degree you want in order to get accurate weights on seperate parts or assemblies as they are. I have to rebuild the top end, and it's getting pretty tired, time to sort it all out before summer arrives. I'll post it up or send a PM when I get to it, didn't mean to totally forgot.  :-[

Thank you.