As you all know my 1996 Scrambler is chain driven to all four wheels. This is sometimes a pain, but thats the way it is.

I recently replaced my middle concentric with the new style because my old one died when the bearings went out. When I put it all back together I replaced my front drive chain and lubed the rest, back and middle chain. All chains are tightned to spec. Under hard acceleration, it sometimes makes a strange "clunk". It appears to be coming from my middle chain, by the rear brake assembly. It has never done this before. Could it be my rear chain as a sign of needed replacement? What about those roller chain tentioners? I'm stumped.

 

A couple of things come to mind having owned a 95 Sportsman 400 3 chain #4*&%#.

Have you ever lubed the grease fitting hiding behind the disk brake on the output shaft? (Of course you have)

Are your rear sprockets hooked and showing signs of wear?

Does your rear chain have any kinks in it?

Kinked chain and worn sprockets will make these cruching, clunking, clicking sounds. You may also feel vibration through the floorboards if things are worn. I will also clunk on hills and curves under load.

 

Yes. That grease zerk for the output bearing holder is a pain to get to. Need a long grease gun hose! I am guessing that it is my rear chain because my front drive sprocket is hooked a little. Will be replacing sprocket and chain at same time. Does anyone have any other sugestions? Thanks.

 

Could be the chain in the transmission i have hade it happen to me.Its not to hard to change.