Rattle or sputter when accelerating

mjm1374 · Post by **mjm1374** » Thu Aug 07, 2014 12:10 pm

Over the last week I've had a growing noise when I accelerate I can't track down. It happens when I get to around 40mph. There is a rattle or sputter, its hard to really put an exact sound to it. There is no loss in acceleration or any other side effect but it is getting louder and happens consistently. I've loosed for loose parts and any leakage signs but nothing.

Any ideas?

TVB · Post by **TVB** » Thu Aug 07, 2014 1:21 pm

Does the noise go away or lessen above 40mph? If so, it's probably something that's resonating with that frequency of the engine, which may or may not be a problem with the engine itself. If not, I'd have it checked out by a mechanic. I had a similar problem with my old scooter, which turned out to be a cracked cylinder.

Tocsik · Post by **Tocsik** » Thu Aug 07, 2014 3:08 pm

How many miles on the scooter?
Original roller weights?
Any recent service or repair?
Stock exhaust or after-market?

A lot more info is needed to provide you with any help.
It could be a dirty CVT, worn rollers, loose head bolts on the exhaust flange or any number of things.

mjm1374 · Post by **mjm1374** » Thu Aug 07, 2014 6:31 pm

the rattle does go away at about 45-50mph, But I have checked for loose equipment. Bike has about 15K miles, it does have an aftermarket (Prima) exhaust. I do most of the service myself but might be time to take it in.

Thanks.

Mc