ATV machine sheave risks

[Tbaz]

any long/short term risks to a machines sheave , look to get one for my 700 grizz.

 

[LBZ]

A what????

 

[AreWeThereYet]

Not really, but like any aluminum sheave if you run in dusty conditions the sheaves will wear quickly especially if you run around the same RPM range all the time. On my 660 rhino, I just ran a 1mm shim and some grizzly 600 roller weights. Yours are 18gr, 660 are 16gr, too bad I don't have my old ones I would have sent up to you for free, so you could try them out, save you from buying new ones.

 

[QMAO]

If you want to maintain the top speed but want to reduce to lower gearing, look into having the shieve machined.
I have machined a few King Quad clutches with good results.

 

[whoDEANie]

No risks. The only thing is that you've wasted your money if you ever have to replace your primary. I have Airdam stage 2 on both of my Grizzlies and love them.

 

[Thunder101]

Well this is old ! Same question, I contacted coop about machining my movable sheave on my 15 Grizzly but dont want the down time of sending it to Utah. Anyone in Canada ? and whoDEANie what is the difference between the two mods since you seem you know ? All I know at this time is the coop mod of machining the sheave and bearing boss allows the belt to ride a lower so it starts on a lower ratio.

 

[whoDEANie]

I hear great things about that coop's work but have no idea how it compares to the Airdam setup. Essentially, machining has the same effect on low end power as the much cheaper meth of of shimming. However, with machining, you won't loose any top end speed. The Airdam stage 2 also includes modifications to the cam plate which will keep you in mid range a little longer and potentially (not for me) give you a slightly faster top end speed. I do not know if coop does this modification as well, but I would suspect he does based on the good feedback I've heard of his work.

Rapid Revolutions in Edmonton usually stocks 2 or three Grizzly primaries that are already machined. If your is in good shape, they will simply trade you across if you don't want to wait - same price. If I remember correctly, it cost me about $240.

 

[doorfx]

You lose top end with airdam machining. That's why he does the fixed plate mod. It allows the rollers to go further out in the valleys.