[Silverback355]

Hi guys, wonder if you've experienced a knocking noise from the bottom of the bike. It's more obvious when I'm doing approximately 20-30 mph in 2nd and 3rd gear. It's only when accelerating and not when I ease off the throttle or pull the clutch in.!! Any help or ideas would be great. Thanks.

 

[SLM13]

shot wheel bearing?

 

[Silverback355]

Hi, I've already had the rear wheel bearing and spindle replaced.

 

[LouG]

Hi guys, wonder if you've experienced a knocking noise from the bottom of the bike. It's more obvious when I'm doing approximately 20-30 mph in 2nd and 3rd gear. It's only when accelerating and not when I ease off the throttle or pull the clutch in.!! Any help or ideas would be great. Thanks.

It could be a rod wanting to be let out.

 

[RichBinAZ]

Is the noise related to engine speed, tire rotation speed or chain rotation speed?
Very little info to go on. It may be obvious to you, but not to anyone else.

 

[Silverback355]

Is the noise related to engine speed, tire rotation speed or chain rotation speed?
Very little info to go on. It may be obvious to you, but not to anyone else.

Hi thanks for your question. The noise was coming from my chain and front sprocket. After I replaced them at the weekend the knocking noise disappeared. The front sprocket was well worn, probably the original. !! The noise was only when I accelerated and more obvious at low speed in low gears. 😉👍