hi Iam a newbie, my bj250a has a clunking noise while riding and only does it when you back of the throttle, it wont do it on a stand only on the road, any ideas?

Scarlet thorn any ideas, you seem to very knowledgeable>

Good morning,
I am unable to go for a ride and record the noise due to coronavirus restrictions,
the noise is a loud clunking, sounds like its a back lash sort of noise when you back off the power,
it does not sound like a bearing noise,I have checked chain and sprockets and cush drive, it makes noise in all gears,
just wondering if there are any known problems? gearbox,balancer shaft,etc any problems with woodruff keys wearing?
any help would be welcome,
thanks
Gazza

Hi gazza,
I haven't heard the noise the exhaust pipe (between engine and muffler) makes, when the inner tube is loose.
Perhaps that's what bothers you. If that's the case it's harmless.
I hope it's nothing serious.

Cheers
Soulie

Thank you for your reply,I do not think its anything to do with the exhaust, it is a heavy clonking noise as if its something worn or loose.
Thanks again,
Gazza