crankshaft weights on penton 400

[thedish]

Can anyone out there tell me how to tell if a 400 is the later type with crankshaft weights.  This was suppose to tame the beast some and make it easier to ride in the woods.

w. terry dishroon

[Mike Lenz]

Motors with serial numbers higher than 2808 have the flyrings on the crank. I believe this occured in late 74 or early 75 models.

 

[Dr.2Stroke]

iguess this weights were specially mounted on the"GS" cranks,means the enduromodels here in europe. due to the fact,that the most "enduros" in the states were changed MC models,they hadnt the flywheels.The weights gave more power in the lower range of the engine,which was more necessary in the enduro models

 

[Mike Lenz]

In the states all engines after the serial number above had the flyrings.

 

[thedish]

thanks for all the info that you guys answered with.  I can now check the motor numbers and not take the top end off.

w. terry dishroon