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You can cause it to run lean and melt the rings and piston.

You will probably be ok but there is a chance.
 

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Agree ^^^^ I would atleast step up a size on the main to compensate.
 

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Discussion Starter · #4 ·
ok thanks guys. and also do you think if i went to a track without my spark arrestor would they still let me ride?
 

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Most are tracks are closed course. You do not have to use a spark arrestor. But definitely call them
 

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CATISTROPHIC ENGINE FAILURE!!!! Re jet your carb!!
 

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I do but it is on a different machine with lots of upgrades
 

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I've got an HMF Penland on my 650. Made a world of difference but didn't even think about firing it until I put a Dyno-Jet stage one kit on it. You've got a lot of folks on here with a lot of experience giving you advice and the one thing that stands out is re-jet.
 

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Your pipe should have 3 allen head bolts on the muffler. loosen the bolts, take the plate off, drop in the spark arrestor, put the plate back on tighten bolts. It's that simple. If you bought your pipe new it should have come with the correct size allen wrench.
 
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