RE: [ST] ST transmission/chain 'catch'

["Ken Mitchell" <kp.mitchell@xxxxxxxxxxx>]

Not common, David, but it shouldn't be there. What I'd do right away if I
were you is double check the chain for looseness, put the bike up on the
center stand and check for tight spots (as in, does the chain need a lube
job?)

Next, remove the front (countershaft) sprocket cover and check to make
certain that sprocket is fastened snugly. Do the same for the rear, plus the
axle nut torque setting.

The only thing in the final drive that you can't inspect without some
disassembly would be the cush drives in the rear hub and within the
countershaft sprocket. (That front one is the chief reason I always use and
recommend Triumph OEM replacement sprockets, BTW.)

With a chain drive, this area is the most frequent source of drive line
clunks.

Good luck!

Ken M.
'00 RS
Spencer MA USA (also now buried in the season's 1st significant snowfall.)

- -----Original Message-----
From: David Pullen
Subject: [ST] ST transmission/chain 'catch'

Hi all,

In riding around today, I was reminded of an oddity in the behavior of my
ST, and wanted to see if this is common or not.

When I am coasting with the clutch engaged or using transmission braking,
and then I start on the accelerator, there is a discernable 'clunk' and
catch in the driveline.  This is very pronounced in lower gears.

I don't believe my chain is loose; there is no noticeable sag anywhere.

If I have the clutch disengaged and then start on the throttle, I don't
believe I get the same behavior.

Does anyone else experience this?  Is this just the nature of a chain-driven
bike?  This is my first, so I don't really have anything to base a
comparison on.

Thanks,
  - Dave

'03 ST


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