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Pic of my busted top end...what comes next


LanceG60

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I got the quad like 2 weeks ago and it really hasnt run perfect, so I got aggrivated tonight and pulled the head. Here is what I found.

 

530396_1431594228973480203_vl.jpg

 

(Look at the bottom of the left piston)

 

So what would be the best top end kit for me to get? I have a cool head and was told they are 19cc domes in there but how can I be sure? If I posted a pic would someone be able to tell? I don't want to go crazy with the rebuid...just wanna get it back to running so I can have some fun. Believe it or not I was having fun with how fast it was like that...I can't imagine what it will be like with some compression. Any info would be awesome. Thanks.

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im pretty sure dlnoss or screemin shee might be able to tell .. there are so many member who can tell . its hard to list em all .. they all know who they are ... what elevation are u at ? where u runnin just pump gas ?..those domes are borderline race fuel at certain elevations.. if u are at sea level id say thats what caused the piston to look like that , once your compression is high u need to run race fuel or av gas ..

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recreation unlimited can sell you a whole kit including bearings for 140 shipped to your door. The domes should have a number on the side of them. You'll have to pull your jugs off to really see what happened. Mine kind of looked like that. Mine lost a ring on the upstroke so it was kind of opposite of what yours was. Pull the jugs and take some more pics of the piston. Any cylinder wall scoring?

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Ok well I picked up a Wiseco top end kit, an o-ring kit for my cool head, and the cyl's are getting honed out as we speak. Is there anything else I should have to do before I start putting it all back together besides cleaning everything up? And if I switch to 20 or 22cc domes, would I notice a power loss? They told me the reason I'm buying a top end is because I wasnt running race gas...so I'm wondering if its worth it to have to buy race gas and keep these domes. I just wanna have fun with the thing and drive it a lot, and when gas is gonna be $40 for 5 gallons that might not be able to happen. I kinda like paying $5 and blasting around on the thing for 6 hours.

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go to nossmachine.com, he's got a compression chart for your elevation. I'd go with a set of domes that you'll be able to run regular fuel, if not a little race thrown in there until it drops a little compression. If you dont have your crank welded I wouldnt recommend the higher compression. The higher the compression the less your top end is gonna last.

 

The power loss wont be that great, maybe a horse or two and you can gain that back in other places. You might feel a little loss in low end torque as well.

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yeah, it happens. Its not good to get it down in your crankcase but it happens, as long as its not like a quart down there, it'll just burn up when you start it up. If you got a lot you could always drain the trans, pull it out of the chassis and turn it upside down.

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