[Raptor Motor Noise] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

Pages:1

Raptor Motor Noise
(Click here to view the original thread with full colors/images)

Posted by: Rusty91o

My friend has an 05 Raptor 660. The top end was just replaced, and with new piston, and rings, bored out, the whole deal. He said he had a ticking in it, so I figured the valves weren't adjusted to spec. I fixed them, but theres still another noise. It a loud clanging noise from the top end. I really don't know what It is. Any ideas?

Posted by: LT250_JOE

THE VALVE TRAIN IS VERY DIFFICULT TO GET RIGHT. DID HE PUT NEW CAMS IN??? NEW VALVES??? SPRINGS???? IF SO, SEVERAL ADJUSTMENTS NECESSARY. A VERY GOOD FRIEND OF MINE JUST INSTALLED CAMS IN HIS AND HAD TO ADJUST HIS VALVE LASH SEVERAL TIMES. I WENT RIDING WITH HIM 3 TIMES, AND BY THE END OF THE DAY, TICK....TICK.....TICK... FINALLY AFTER ABOUT 3-4 TANKS OF GAS IT WAS OVER.

NEW PISTON COME WITH A WRIST PIN????

WORST CASE, SHOP BORED CYL WRONG AND ITS PISTON SLAP!!

KEEP POSTED AND GOOD LUCK

Posted by: Rusty91o

Well, I was able to tell the valves were also right, I used the feeler gauge, and afterwards, the motor ran right, and would idle perfect. But the noise was still there. But I do bet it just needs to be broken in. We were about to tear it all down and ses if there was a visible problem.

Posted by: LT250_JOE

I DO REMEMBER FRIEND SAYING HE USED A DIAL INDICATOR THE LAST VALVE ADJUSTMENT AND GOT A BETTER READING/ ADJUSTED BETTER. I'LL ASK HIM MONDAY WHY AND POST.

Posted by: RaptorRacer45

Also check the timing chain....if its loose it will make a pinging noise in the motor also