MC21 clunking noise

**Fri Jun 24, 2005 11:05 am » Post: #1 » Download Post**

On my ride home yesterday I noticed a clunking noise that was not there earlier. It definitely gets faster as speeds increase. Engine speed does not affect it, clutch doesn't affect it either. Happens when under power or coasting. Any ideas? I got home late so I really haven't had a chance to take a look yet but figured someone might know for sure and save me some time.

Thanks
Don

**Fri Jun 24, 2005 1:20 pm » Post: #2 » Download Post**

Chain?

**Fri Jun 24, 2005 1:39 pm » Post: #3 » Download Post**

Wheel Bearing ?
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**Fri Jun 24, 2005 1:46 pm » Post: #4 » Download Post**

Those are the only suspects that I can come up with too. Shouldn't be the front wheel bearings because I swapped those out a month ago. I can't really tell if it's coming from the front or the rear really though. Guess I'll start with those two and go from there unless someone comes up with a better guess.

**Fri Jun 24, 2005 2:36 pm » Post: #5 » Download Post**

Get the rear wheel off the ground and spin it round to see if there are any tight spots in the chain.

**Fri Jun 24, 2005 3:50 pm » Post: #6 » Download Post**

Check the brake pads, as they can be the ones making the noise.
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Charles Gallant

**Fri Jun 24, 2005 4:37 pm » Post: #7 » Download Post**

I thought about that Charles, so I tried hitting the brakes hard or soft and listened for a change. Nothing except for the noise slowing down due to the decrease in speed. Thanks for the suggestion though.

**Fri Jun 24, 2005 9:21 pm » Post: #8 » Download Post**

Don there were no small furry animals in your path on the way home were there? Some poor squirrel may be stuck somewhere in your fairing knocking to be released,well it was a thought anyway....... Very Happy

**Fri Jun 24, 2005 9:26 pm » Post: #9 » Download Post**

if it is pretty loud i would say it is the chain. i had the same problem and the chain just had this huge tigth spot in it. changed chain and it was sweet
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94 mc28 SE

**Mon Jul 04, 2005 3:03 pm » Post: #10 » Download Post**

It was indeed the chain. Finally got around to investigating it. Happened each time the same point of the chain came around. Put a nice new gold RK chain on with a 43T sprocket and everything is wonderful again. Thanks for all the suggestions.

Don

**Mon Jul 04, 2005 6:21 pm » Post: #11 » Download Post**

43T?... nice! Twisted Evil

Tell me what it goes like! I currently have the stock 15/40 on mine but was thinking of going to 42T.

Cheers,
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Andy.
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**Mon Jul 04, 2005 8:33 pm » Post: #12 » Download Post**

i run 43t but have only ever run that so cant compare it to anything else.

**Mon Jul 04, 2005 8:41 pm » Post: #13 » Download Post**

Is the 43T for higher top end speed?

**Mon Jul 04, 2005 9:26 pm » Post: #14 » Download Post**

oterh way round more power the higher u go. mx bikes run like 50's
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94 mc28 SE

**Mon Jul 04, 2005 9:47 pm » Post: #15 » Download Post**

Goes like stink now! At 65mph it's revving at 6000rpm in 6th gear! I don't have much need for top speed. I use the bike primarily for fun and occasional commuting. The 43T seems to suit my type of riding. It's also much easier to start from a standstill. Less clutch slipping.