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Discussion Starter #1
i recently put a used engine i bought from a motorcycle scrapyard since the original one suffered catastrophic failure and the bike revs on neutral to 16500 but when i drive the bike stops a 10k and when i touch the headers after 20 min ride two of them are hot and two are cold. i switched injectors spark plugs and coils and still the same two left cylinders dead and the exhaust is glowing red hot overheating?? wild guess i have stock valves from engine sitting on a shelf?? i still have my old head and it looks to be in good condition so im wondering if i should just put my old head on this engine and try it. pistons and rods look undamaged on the used engine. any help be appreciated
 

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I assume you didn't hear the Motor run before you purchased from the Scrappy ?
You need to get a Compression test done to see what sort of Puff pressure she has.
 

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Discussion Starter #4
no it was on a shelf unfortuntly but i dissasembled the head and im replacing with a my head i had from before that i know is in working condition. im puting new gasketd and new piston rings
 
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