Thread: Help 1200 gpr troubles!!!
08-11-2011, 11:37 PM #1
Help 1200 gpr troubles!!!
Ok so I let my local yamaha guys do a top end rebuild then after 4 hrs the back exhaust coupling pops off then I take it back they fix it and now I fire it up and it sounds terrible like a fast pitched sound like a card in bicycle spokes I do a compression check and the front and middle cylinder are 95 psi and the back one is 30. So I pull the head and the first two cylinders have a spotted oil residue on them and the pistons are wet and glossy and then the back one is a caramel color and dry.. Nothing let go but I'm pissed so please help me diagnose before I take it to the yamaha place tomorrow and rip someone's ass!!!
here's the middle cylinder
08-11-2011, 11:40 PM #2
08-11-2011, 11:42 PM #3
Here's the bad cylinder. 30 psi and isn't 95 psi a little low anyways???
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