When the bikes running, i can hear a slight knocking noise...Is it the pison or something?? The bike appears to be running fine, is it something serious though?
It wouldn't have anything to do with the fuel would it??
Thanks!!
A low octane gas could be causing detonation that can sound like knocking. Min. octane for a stock bike is usually 92. Modified, high compression bikes need higher octane.
Is the piston new? A worn piston can slap against the cylinder and make a racket.
Thnaks guys....First of all, i'll get some decent petrol for it....I was just using stuff that was lying around for a while, and i mixed the oil up pretty roughly aswell, so i'll do that and see if it changes anything..
Thanx!
Does your noise only happen on deceleration? Or is it a constant thing?
I have three Yamahas and all three have that ailment on deceleration. I talked to Eric about it, he suggested that I work on my jetting. I have thouroghly ((*?&%) how do you spell that word??) checked the play on the rod on one of the engines, and can find no fault there. It's an ongoing learning expierence.