I put a new crankset on my 1986 Trek 400 Elance. It is an Avocet touring triple with the matching bottom bracket- the rings are 52-42-26.
I had been riding the wheelset from my 1985 Trek 720- with a Helicomatic freewheel. I assumed that the noises I was hearing were the spacing on the freewheel and the chain rubbing on cogs. It is an non-indexed freewheel- and I'm using Accushift 6 speed- so such a problem is likely to exist.
I just threw the wheel from my 1985 Trek 620 on there- and I started getting the same noise... Now this is an SIS 6 speed Shimano freewheel, so I put it back on the stand and did some more listening- and then I realized... - so when the chain is on the smallest 2 cogs it's the chain rubbing on the big chainring.
How do I remedy this? I was thinking of some sort of spacer between either chainring and the crank.... is that about right?
Oh, and of course pix or it didn't happen.