Help... 1994 Marin with slipping chain.

[simcfarlane]

Hello

This is my first retrobike - a '94 Marin Palisades.

I didn't want to buy anything too expensive as this is my 'learning' bike.

I've stripped the frame and painted, replaced bottom bracket, new headset, rebuilt the wheels - all clean and reassembled, new bearings everywhere. First ride - and disappointment....

The chain keeps slipping on the 3 smaller cassette cogs.

I replaced the chain and jockey wheels (as they had loads of play). I didn't replace the cassette as it still looks pretty good. Still no joy. I'm not sure what's causing it. It doesn't seem to be torque causing it as it happens on smaller chainrings too. Seems to relate to the cogs or the position of the derailleur.

Any ideas what to try?

Could I have made a schoolboy error when putting it all back together?

Cheers

Simon

ps... gonna add some photos and a build diary when I get it working!

 

[legrandefromage]

buy a new cassette!

the top jockey wheel is supposed to wobble a bit too

 

[simcfarlane]

Re:

The jockeys rattled - really worn. I think the bike had seen quite a few miles - but not much grease!

Didn't want to go for cassette if it was something simpler.

It's virtually all new now - I guess it makes sense. Like I said - new to all this.

Wasn't sure if it was the Freehub body. I did clean and re-grease.

I'll give it a go!

 

[xerxes]

Re:

1994 should be a 7 or 8 speed cassette and you can get a new one for around £10.00:

http://www.chainreactioncycles.com/sram ... p-prod6387

http://www.chainreactioncycles.com/shim ... -prod68154


A new chain on a worn cassette is quite likely to slip because the sprocket teeth have worn to fit the old worn chain. In addition, because the load is spread over less teeth the smaller sprockets generally wear more than the larger ones.

Lots of information here: https://www.sheldonbrown.com/chain-wear.html

You should replace chains before they get too worn, which should make the cassette and chainrings last longer. You can use a chain checker tool that will indicate when you should replace the chain: https://www.parktool.com/blog/repair-he ... -a-bicycle

 

[t wild]

Yep. New cassette is the only thing to fix that. Had the same on my nine speed. Didn't look bad at first but slipped like mad on the bottom 3 and on closer inspection it was buggered. Swapped for a new one and she was fine

 

[simcfarlane]

Re:

I've just ordered a replacement 7 speed speed cassette.

It would make sense. The chain was a mess... Like the rest of the bike.

Wheel bearings were seized. Bottom bracket took a scaffold pole to remove. LBS re-cut the BB for me. Despite all that it cleaned up amazingly. Tribute to the engineering.

This was the final thing I need to learn about.

Thanks for the info... I'll let you know how I get on.

 

[integerspin]

If in doubt: stick the front wheel against a wall, stand on the pedals and watch it jump.

 

[legrandefromage]

We need pics of the chainrings too as they wear but don't always show it

 

[simcfarlane]

Re:

I'll take some photos when I replace the cassette.