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valve tap
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Posted by: SteveRidesQuads

Ok so i got my motor rebuilt for this race season. Bored it, ported, polished, took out reverse, over sized valves, heavy springs, everything i could do to get it race ready. Ever since i keep hearing a tap that sounds to me like the valves are too loose. I brought the quad over to my mechanics house and he did the whole once over and adjusted the valves.

So today i went out and rode it for a good hour and a half and the noise comes back. Could this be because I'm running to hot and need an oil cooler or is this just a sound I'm going to have to get used to?

Any info would be good. Thanks.

Posted by: big bad beny

What kinda of gas are u running? and what comprestion is your piston?

Posted by: SteveRidesQuads

problem solved, i talked to my mechanic and i am now running 110 octane instead =]

Posted by: TRX-330

Ya when i had mine bored out last year it had a tick noise till i moved up in higher octane. I also used to use race gas when i could get it at the local gas station.

Posted by: hondarider110

u might want to tear it all apart to see if u didnt harm anything in the motor.

i did the same thing and i blew it twice then switched to 110 octane. lower octane causes it to vibrate more which creates harmonic vibrations and cracked the sleeve ring at the top and pulled the sleeve into the cases.

wsnt pretty.

Posted by: TRX-330

^^^^^ Same happened to me when i had mine bored n ran 87 octane, never again will i run that low.

Posted by: TRX-330

This could end up in ur bottom end
http://i137.photobucket.com/albums/q208/DrptS10/rebuild5.jpg
And your sleeve could end up looking like this
http://i137.photobucket.com/albums/q208/DrptS10/rebuild3.jpg

Posted by: hondarider110

yep thats it... very nasty. one of my friends did that last weekend in the 2nd moto. he was pissed.

Posted by: TRX-330

ya n that wasnt all of the **** from inside the case

Posted by: hondarider110

me and my dad just pulled my buddys apart today it was nasty. good thing his dad owns a dealership so he got all the parts today.