New member Tom

[theduncan]

Hi I'm Tom from NS Canada.
Recently picked up a running, registered '74 TX. Daily rider, and lots of miles, but got all the upgrades....deep sump, oil cooler, even double disc brakes.
Runs great, however has a rattling noise around lower cases. My guess is balancer chain, but adjuster doesn't cure it. Maybe stretched too much. I  found a balancer chain and plan to replace it this winter, but would welcome any input on this situation.
Is this noise common? Is it a serious condition? Drained oil and found no metal, but still concerned weather damage being done. 
Any advise appreciated!

[douglas]

Hi Tom. I have just finished the rebuild on 2 TX750 engines and know these engines quite well. I would suggest you try adjusting the balancer chain. The noise is quite discernible when you tighten it too far. Now, back it off untill the noise JUST disappears. There is a chance the guides for the chain could be chewed up which requires replacement.
Another source of noise is the starter chain and one way clutch could be the source of noise. You should also do the cam chain adjustment which requires removal of one of the carbs. Suggest you get a factory manual for details.
These engines are somewhat more work than even Honda CBX 6 cylinder engines which I have a lot of experience on.
Removal and replacement of the engine in the frame is VERY tight with minimum clearances. With high miles it might be the best for a engine teardown.

[miller]

Hello Duncan,i replaced a couple balancer chains over the years and have been down the route of different chains etc, dont waste your time and get a genuine chain from speed and sport,its the only one with the depth in the side plates for enough tension, what i will say is that i cut the new chain and feed it on with the old chain, i sourced joining links in stainless to the american spec 3/8 th chain and leave off the clip link and rivit the remaining material over,i do this on a bike bench with the mainstand on a 4x2 and the back wheel strapped to the bench to give enough clearance to work from underneath, saves stripping the engine and removal, not a big job, you may need someone to keep the chain in tension while you feed it through which takes four crank revolutions,regards miller