2021 KRX1000 primary spring removal test

trying to see what the RPM difference is by taking out the primary clutch spring. will need to do testing on the trails but here is a same road ride before and after.
rpms
speed before after
10 4400 4000
25 5500 4900
30 5600 5150
35 6000 5200

[@p-nut4209]

Everybody, please watch the video from JBS performance on the KRX 1000 primary clutch spring. He will explain why to run without it He explains and debunks at the same time…..

[@hillbillycustom1730]

So could you tell any belt slipping what about how it holds back does it still

[@charliemcdaniel3561]

Update on how you like or dislike with spring out?

[@weekendsxsguys5599]

in Michigan i like it without the belt. But we are pretty flat, most of the trails are 25-40 and the noise in the cabin is very noticeable for the little bit of power loss. when we head to West Virginia we put the spring back in.

[@gordonsillars]

Wow! About 1000 RPM drop. Any negative side?

[@weekendsxsguys5599]

the mid range probably lost about 8-10 hp the bottom end felt the same. if i was rock climbing in WV or Tennessee id probably put it in. but me being in MI we are a flat state

[@WVHotRodRhino]

if you lower the rpms the power is gonna be lower no matter how u lowered it..if you added weight to the weights and left the primary spring in it would still be lower on power from the rpm loss...it was a free mod to lower rpms and get better belt life for the ones that wanted less noise and heat and its easier on the weights wearing because they have less force to push@@weekendsxsguys5599