Not Pulling RPMs - Motor Mount Issue?

[JustinMan43]

New clutch weights & blue/pink spring in primary, new cleaned belt set to the right deflection, new top end, new reeds, put stock can back on. I cannot pull proper rpm on my 13 pro. If the track is completely trenching it gets like 7800 rpm maybe. If i start wheeling I can get it to kiss 8050. I was just informed about the motor mounts getting weak in the Axys chassis and robbing RPM, is that an issue on the Pro chassis as well?

tbh I don't really know how the secondary even really works, would a rebuild or just a new helix help? Not having 8150rpm sucks....

 

[adamg]

Easy answer is to just drop 2 grams of primary clutch weight.

 

[Eastcoastdan]

Short answer is yes. If your motor mounts are worn out it can affect peak rpm's

 

[JustinMan43]

Easy answer is to just drop 2 grams of primary clutch weight.

thats a band aid fix, im already running the 62s which is good for 6000-8000 feet, and a guy probably doesnt do much above 6500 in Vale and Mcbride

 

[dragonweld28]

That stiff primary spring isn't helping. Go to a 120/320 primary spring and increase your secondary spring to a 140/240. Your most likely not getting passed the 56 degree first angle on your helix.

 

[Got boost want snow]

Did it pull top rpm before? If so then look at motor mounts if not then clutch changes are probably required.

 

[prairieguy]

did u ever find out why u couldn't pull rpms?