OEM mod Handling

[mxalex229]

Sorry if this has been poster before; I searched but did not find a similar topic.

New player but familiar with various Sim racing mx games etc....
Installed the game, got the controls set and played with the base 250F at the practice track. I was able to get 3-4 laps without crashes and hit all the lines and jumps fine (sorry, I don't remember lap times for reference)

I installed the oem bike mods, now I cannot move without crashing. The 250F loops out with half a pull on the trigger in first gear. The front end is constantly wheelieing, and I'm pushing forward the whole time. Went back to the stock game back and I was able to ride fine again. But the OEM mod bikes all behave like they are 1000cc bikes filled with Helium.

Did I mess something up? Is there a setting I was suppose to change?

Also, the low speed physics, do you just never take an inside turn with a hump? Turn 1 at forest raceway seems impossible with these physics.