XS1100SF Carb Replacement

[GoodoleBoy]

So..... My bike has sat around collecting dust for about 20 plus years. I have stripped it down, repainted the tank, painted the fenders (the chrome was pretty ugly looking with all the rust). I have ordered in new shocks, a rear brake rebuild kit, carb rebuild kits....etc....

When I got the carb rebuild kits I was somewhat surprised to find that the diaphram assembly was not part of the rebuild kits. A quick call to Yamaha verified that the diaphrams are still available... at a whopping $125 per each. Seems like replacing the carburators might be a better option if possible. Has anyone tried checking with Mikuni to see if the entire carb assemblies are available and how much they might be?

Also on a seperate note.... the aluminum engine housing, fins, covers, etc. are all looking pretty ugly on my bike with oxidation of the aluminum. I have tried various things up to and including hitting them with a brass brush on a dremmel to try and get this crud off but to no avail. Has anyone got a magic bullet for cleaning the aluminum on the old girl?

Thanks,

[DiverRay]

The carb diaphrams are available from mikesxs. You need to tell him it;s off a 650, as he doesn't like to sell to xs1100. If you do a search on carbs, you can probably find the thread. I think the diaphrams are still about $85.00 each. Carbs are now about $450 each for flat slide mikuni's, so a rebuild is still cheaper. It's not hard, and once you have all the new parts in, you should get about 20 years of riding on the new diaphrams.
The only thing I can think of on the aluminum is navel jelly. I have not had to clean anything that bad, but the wort I've had, I used a wire brush, and then went to a polish with steel wool. I started course, and went down to 0000 to get the shine back.
Ray

[GoodoleBoy]

Thanks for the info on the carb diaphrams. I will see if I can find the link to get them ordered. $85.00 is alot more palitable than $125.00 each.

I thought of the naval jelly option too, I haven't tried it yet though. I will let you know how it works out. Part of the issue for me is that there was a clear coating from the factory on the covers over the magneto and crank? on the other side of the bike. Some, but not all of the clear coat has come off the covers, making it difficult to get the same level of finish on the entire cover. I am about to give up, use something like 800 grit wet/dry sandpaper on the covers and then as you said, polish them back to a shiny finish.

Thanks again,

Dwight

[Ken Talbot]

Hey Goodoleboy, you may want to do some searching on this site for articles about repairing diaphragms, then have a real good look at yours. Unless you have some major rips, you might be able to get away with a much cheaper repair. And, if the diaphragms don't 'look broke', they may be just fine. They may be old, but if you are at all lucky, your diaphragms may actually still be okay.

[TopCatGr58]

Hey Ken and Goodoleboy,

Mike's XS lists 2 different diaphragm assemblies, the 3rd one they say is NO LONGER AVAILABLE. The first one states it's for the 71-77 series 650's.

The other one states it's for the 80-84 650's, and I know that this one will NOT fit the 78 carbs, wrong diameter.

However, I'm not positive about the 71-77 style, Mike's
part #20-6029. Has anybody ordered and recieved and used this one for replacing their 78-79 series diaphragms??

I looked up the parts fiche, and they have totally different prefixes between the 650 and the 1100 :

256-14940-00-00 DIAPHRAGM ASS'Y (256-14940-01) XS650D'77

2F3-14940-00-00 78xs11

T.C.

[GoodoleBoy]

I noticed the differences also on the part numbers..... I am not sure if these buggers will work or not. Worst case scenario I guess is I order one in and see if it's the right size or not and go from there.....

Anyone have a 650 that they might want an extra diaphram assembly if I strike out?

[andreashweiss]

I have some used xs1100 carb parts left. I may have three carb diaphrams. send me an e-mail andreashweiss@yahoo.com They are not ripped nice price save you some money. I also have some good chrome pieces for sure trans cover.andreas

[fxrer]

Sets of (4) carburetors frequently come up for auction on E-Bay. There's a set up for bid now.

item # 4601389862

[webbcraft2150]

Heres what worked for me on getting rid of the clear coat on your engine cases/fork tubes. I used spray on paint remover that washes off with water. After a couple of applications, the clear coat was gone and commenced with the polishing procedure. The paint remover did not discolor the cases or fork tubes. I was easily able to polish them with Simichrome and some Mothers Metal polish. Upkeep consists with quick hand polish every fews weeks. A good coat of wax helps keep them from water spotting. I also have used this procedure on clear coated car wheels with the sme good results.