I use to have agang exe 24 (2011) street MTB and want recreate it inside LFS.
Who knows maybe LFS someday will support bunnyhop or at least hop (like GTA:SA does).

Engine

I figured that way:
Crank arm length = 0.175m
Rider mass = 70kg
Hand power (pulling handlebar) = 30kg
therefore
Rider force on pedal = (70+30)kg*9.8=980N
Engine moment = 980N*0.175m=171.5N*m
Since model mass (with rider) exceeds actual mass (due to: motor 26 kg, battery 7kg, wheels 19kg) I decided to set 152% torque.
IRL 12.3kg bike plus 70kg rider = 82.3kg
LFS 55.0kg bike plus 70kg rider = 125.0kg (152%)

Final Drive

Bike has 25 tooth front and 11 tooth rear sprocket, so 0.44 gear ratio. Since LFS allows 0.50 minimum, compensate with final drive ratio of 0.88.

Dimensions

According to dimensions from agang 2011 catalog (46.2 MB) (page 63/80):

Mesh

Current progress:


At first I thought to do it quickly, but got a little bogged down in the details

Don't make road bike because Scawen will get addicted and he will stop coding

Since D48, front tyre constantly squeaked at speeds above 27kph (17mph), even when riding in a straight line, which is quite annoying.
In reaction display mode, it is evident that the noise is somehow induced and increases proportionally with the significant lateral force on the front tyre.

Obviously, the physics model is not intended to simulate rigid bikes. Perhaps it was just that before the introduction of balance-maintaining forces, this worked fine. So, I added a soft fork...

...and it turned out the rigid fork wasn't the issue.

Lateral force issue remain even when both axles are sprung. And there is another rigid bike mod, whose tyres do not squeak at any speed. So, it's not about suspension stiffness, how can this be fixed then?

There is another problem with this mod: fork elements misalignment during initial travel adjustment, which may be related to described above.