I recently had the dealer do a service for me. I am sure they retorqued or checked a bunch of bolt points.

So I get the bike back and the vibration felt on decel coming to a stop is back up where it was when the bike was new (that is, a bit brutal). I am talking about the engine vibration felt into the seat & frame.

I fixed this once before by tightening one of the exhaust support bolts, but that is clearly not the problem here. Since they guys probably retightened all the exhaust bolts, my question is this ...

Is there a good sequence I can try of loosening and tightening the exhaust system, that will "set" the exhaust system best, and (hopefully) minimize the coupling of engine vibration to the frame?

From my inspection of the bike, it does not look like they did anything wrong.

Thank!
SL

 

the sequence and torque values are as in the manual.

the important factor is that on a rubbermount drivetrain, the exhaust does not contact the frame anywhere, even when the rubber bushings are deformed by the drivetrain flexing on the mounts



vibrations are felt more when the front brake is held at a stop, use the rear brake

mike

 

Thanks mike, I will have a look at the manual. Am I right to assume the sequence makes a difference?

It is more of a coupled vibration, rather than a direct contact or bump, if you know what I mean. I'll do another close visual inspection as you suggest.

 

the sequence is detailed in the manual.

note that the exhaust stud nut torque is in INCH POUNDS ( 1/12th a foot pound) novices often break these by over torquing

the revised value for the tranny end cover bolts is 25 FT lbs

the muffler clamps ( Torca) are considered one use as they deform when torqued.
torquing to lower end of range may allow multiple uses.

Mike

 

Well, I retorqued the whole exhaust, and in the process found that the forward exhaust mount to the engine was barely tightened (the one that bolts up right by the catalytic converter). Same one as last time it was vibrating!

It appears that mounting point is critical to smoothness. Went for a ride and all is well. Thanks for the pointers, Mike.

 

rather than loosen the clamp and apply locktite- can you get a 2nd nut on the clamp to act as a jam nut and keep that tight?

put locktite blue or red on the jam nut

mike