vibrating

[muffinman]

just changed headgasket and camchain, now bike is running fine apart from vibrations at 7k revs, no vibrations below or above 7k. its smooth other than that.

running a full micron system, with race can, standard air filter, and 95 main jets

any ideas what it could be?

[tomzxr400]

Does it sound like metal grinding on metal and happen more when you blip the throttle or let off fast ? how many miles has it done on the cam chain tensioner? did the teeth look worn ?

[muffinman]

no, just vibrations

tensioner has done 25k miles, and it doesnt look worn. there were no vibes before i changed the cam chain

gunna have a look at the chain and tensioner tomorrow, possibly the cams too

[RedexRobB]

Didnt over tighten the tensioner did you?

[muffinman]

how can it be overtightened? its automatic

[RedexRobB]

It is automatic, but i believe you need to set the tension when you put a new one in.

[muffinman]

yeah i reset the tensioner when i put the new chain on.

put the springs back in the bottom of the tensioner, then tightened the bolt that holds the springs in the tensioner. the tensioner took up the slack and is fine, i took the pick up cover off to have a look and it looks fine

[RedexRobB]

Oh ok. Im sure you can overtighten it somehow tho.

A loose part somewhere? The tank cover on my first ZXR vibrated at a certain rev range and i thought it was the engine, just turned out to be part of the plastic cover against the tank. Maybe something similar elesewhere?

[muffinman]

i have thought it could be something else.

i may have a look round and see what could be loose, its probably the tank haha

[tomzxr400]

dont think you can over tighten you can on the lock bolt .
to be honest at that kinda miles id change it the teeth get knackered. take it out and see if you can push it up and down by hand

[muffinman]

nah, the teeth were fine, and when i reset it it was ok

i think its something else, im gunna have a look at the top end when my fairings go off to paint