Clutch does not engage at low rpm and causes machine to lunge severely

Sounds like toward shift linkage isn't fully engaging. Check and adjust cable and linkage.

M7 05 won't rev out properly [Archive] - SnoWest Snowmobile Forum

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Dec 30, 2012 - 27 posts - ‎11 authors
[Archive] M7 05 won't rev out properly Arctic Cat: M Series. ... So I put the proper weights in my m7 and now it won't pull rpms. It's seems .... Well it will rev to 7500-8000 at 6k ft with just the primary clutch. You can see and hear the servo open. With the track on it would rev to 7500 but then fall to 6800-7000. 2008 M8 wont rev over 6,000 RPM
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Bad linkage between shift lever and the transmission.

Hi the cable needs slack if you take all the adjust out meaning the is no free play in the cable your taking the pressure off of the clutch plates causing it to not be engauged.

Ckeck the drive clutch spring.Sounds like it is broke.Might be hard to see.

Often, it mean that the clutch stay engage.
Now the question can be, is the idle to high for the clutch to disengage while at idle? you might try to reduce the idle speed by turning eather the nob on carburator or the ajustement on the cable.

then if the idle is very low and the clutch still engage (that is why you can not shift) you migh want to check at the clutch and see if it is not stuck.

I would check the plastic heat isolator between the carb and cylinder head for leak.

sounds like the Rev limiter is being engaged for some reason, had that happen on my Polaris express, the problem was moisture.

The C.D.I. box(ignition module) controls how high the R.P.M. of the engine go.depending on what kind of machine that you ride,i have seen some aftermarket C.D.I. boxes that do not have a rev limiter.