XN85 - Bad vibration at around 3000rpm

FBJ · Post by **FBJ** » Sun Oct 16, 2011 8:32 pm

Did u powder coat the engine mounts? Re tighten ur mounts

FBJ · Post by **FBJ** » Sun Oct 16, 2011 9:00 pm

You need to remove the mounts and cut the coating of where the mating faces meet

Pedda · Post by **Pedda** » Mon Oct 17, 2011 7:04 am

What did you do enginewise during the rebuild?

callyboy · Post by **callyboy** » Mon Oct 17, 2011 9:23 am

I can only change a spark plug

Pete

Pedda · Post by **Pedda** » Mon Oct 17, 2011 9:48 am

callyboy wrote:I can only change a spark plug

Pete

I bet you're able to do four of'em, cally.

Tim,
as you say everything's got balanced, I take it you matched the pistons for same wheight, too?

In case you don't have any suspects enginewise, do you have proper bar end weights? Not the hip alloy or even carbon ones, but solid steel? They might help a bit then.

Pop-Kat · Post by **Pop-Kat** » Mon Oct 17, 2011 4:00 pm

cam chain could be 1 tooth out ?

Russbusa · Post by **Russbusa** » Thu Oct 20, 2011 6:00 pm

Best ignore that boost guage, stick a "t" piece in line and run a 1 bar guage to check what the actual boost is. is the waste gate stuck open ? Mine was stuck shut at mold this year and made the boost keep building until the ignition cuts @12psi.

As for your vibration. . . . .not got a clue as mines smooth all the way through the rev range,

Katana Owners Club U.K.

XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm

Re: XN85 - Bad vibration at around 3000rpm