carb switcheroo

[phatts27]

Hey guys,

I recently bought a carb bank from a 79. I know it will fit my 81sh but will it require rejetting to perform well on a stock 81? It does have a k&n drop in filter.

I purchased this set intending to run it on my bike when the setup is stock. I already have a dynojet kit for the 81 carbs (came with the bike) so I'd like to set them up for aftermarket exhaust and pod filters (so I can simply swap parts and hit the road when the itch hits). I have k&n pods, Jardine spaghetti, and a Mac 4-2 that I plan on switching to from time to time.

Thanks,

Ed

[DiverRay]

Ed,
The carbs will fit and work as is. Just keep in mind, EVERY TIME you remove and replace the carbs, you WILL have to re-sync them. Just part of the deal, so spend the $1XX and get a set of gauges and a "remote" tank. Makes the job a LOT easier.

[phatts27]

Cool, thanks Ray. I managed to get a used sync tool and stop-adjuster near me for cheap. I have yet to use it though. I'll still need to buy or make an aux fuel tank. I think I have some plastic inline fuel petcocks around here somewhere...

I also have another carb set from an 80 that I bought on eBay. It's so dirty that the throttle will not move and the slides are all stuck. I've had it wet with pb-blaster/ wd-40 for a week now and there is no progress. Should I just keep spraying it down until something gives? Boil it? Hit it with a pressure washer? I'd really like to get it working.

[tcoop]

Cool, thanks Ray. I managed to get a used sync tool and stop-adjuster near me for cheap. I have yet to use it though. I'll still need to buy or make an aux fuel tank. I think I have some plastic inline fuel petcocks around here somewhere...

I also have another carb set from an 80 that I bought on eBay. It's so dirty that the throttle will not move and the slides are all stuck. I've had it wet with pb-blaster/ wd-40 for a week now and there is no progress. Should I just keep spraying it down until something gives? Boil it? Hit it with a pressure washer? I'd really like to get it working.

If you can remove the diaphragms then spray with carb cleaner (Best) or brake cleaner. It breaks through the junk a lot faster. pb-blaster breaks down rust and wd-40 repels water. Neither is good at removing the varnish build up.

[DiverRay]

The other option is a 50/50 mix of ATF (automatic trans fluid) and Acitone. Works great on oxidation, aluminum and steel. I would pull the covers and see if the slides can be pried up, though.

[motoman]

If they've been sitting out exposed to weather with minor rust, first drop that whole mess in a pan of EvapoRust over-nite(won't attack anything but rust), then dis-assemble removing bowls, ect........then drop the mess into a pan of original REAL pinesol, followed again in half and half mixture with water. Then water wash and compressed air thru ALL passages(eye-protection), along with a can of Berrymans carb spray cleaner.
Advice not to pull and pry on ANYTHING till that's done.

[phatts27]

Unfortunatley, the slides are quite stuck. If the evaporust won't hurt the rubber on the slides, I think it's my best bet. Where can I buy evaporust, home depot?

[phatts27]

I found evaporust at harbor freight for 24.99. Thank you all