Originally Posted by ViperZ
That's a great looking ride that is in fantastic shape. Love the vintage Treks!
As to the gear jump, did you run through the derailleur set up, ensuring the jockey wheel is centred under the 4th gear with the chain on the big cog?
I think it's just set-up unless the cassette/chain is worn. It's not inherent to friction shifting or down shifters.
I talked with the LBS guy who also owns multiple vintage bikes. He said the bottom bracket is plenty stiff enough and it shouldn't cause ghost shifting. It's just an adjustment thing. The cassette, chain, derailleur, and cables are new so wear is not the problem. I assume I'll have to adjust things as the cables stretch out. Thanks for the nice comments about the bike. I got alot of satisfaction bringing the bike back to life and it rides very nice.