2005 Polaris rmk 800 not opening up

Oct 15, 2018
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So my 2005 Polaris rmk 800 151 is not opening up it has great hole shot but after that it’s doggy! Just put a Indy specialties bottom end in and bored it out .050 with wiseco pistons I have 160 psi in each cylinder carbs are spotless I have 490 jets in and has slp twins any help greatly appreciated..
 
Feb 12, 2019
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Had this on a phayzer, look at your clutching, I have no idea why . . . But the primary not opening up Caused that one to bog hard, especially after about 40.
 

Dazzler

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Oct 24, 2009
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Cochrane Ab
As per Willjogervais post, it sounds like a ruptured diaphragm on your exhaust valve. With engine idling, look at the exhaust valve cap for puff of smoke/exhaust coming out of the breather hole..
 
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