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Topic-icon 1976 R90 S, Carb rebuild questions

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1 month 2 days ago - 1 month 2 days ago #5843 by mikethebike
1976 R90 S, Carb rebuild questions was created by mikethebike
I've just stripped, cleaned, added new parts and seals etc on the Dellortos.
But I have a few questions.
There are two pieces in the Dellorto seal kit that I cant find a place for;
1. There is a small copper washer in the kit, it doesn't seem to fit anywhere?
2. There is a tiny greenish o ring, again I cant find it in the parts break drawing, or description in the manual. Nor did one come out of any orifices during strip, Any suggestions?
3. There was a partial diaphragm for the accelerator pump. Does this get installed? and if so which side of the diaphragm?

Also while I'm at it, I cant find anything that gives an idea where to set the air screw. but just about every carb bike I've got recommends 1.5 turns out,. Is this right for the Dellorto's.

Thanks in advance
Michael
Last edit: 1 month 2 days ago by Wobbly. Reason: Mods altered title

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2 weeks 5 days ago #5901 by mikethebike
Replied by mikethebike on topic 1976 R90 S, Carb rebuild questions
Hard to believe I've stumped the masters! or was it just a stupid question LOL.
M

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2 weeks 4 days ago - 2 weeks 4 days ago #5907 by Wobbly
Replied by Wobbly on topic 1976 R90 S, Carb rebuild questions
I've never worked on a Dellorto carb.

However, I will say that often times it's easier for a company to put extra parts in a single repair kit to service ALL the various product generations, rather than make, stock and distribute (say for instance) repair kits for 3 different carb designs that vary by only 1 or 2 gaskets. Especially if only a very limited number of a single generation was ever manufactured. So there may not be an answer to your question, except from Dellorto.

That's the "fun" of working on classic bikes. There is always an answer. But you must also allow that the guy with the answer may be dead. :P

Don't hide 'em, Ride 'em !!
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Last edit: 2 weeks 4 days ago by Wobbly.

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2 weeks 4 days ago #5911 by mikethebike
Replied by mikethebike on topic 1976 R90 S, Carb rebuild questions
I arrived at the same conclusion, but wanted to be sure. I got the Dellorto kit from Bevel Heads. Its the same carb on the '79 900SS. There's probably one circuit or needle that needs that tiny seal.
Thanks again, I can now get a good nights sleep LOL
M

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2 weeks 4 days ago #5914 by Wobbly
Replied by Wobbly on topic 1976 R90 S, Carb rebuild questions

mikethebike wrote: I can now get a good nights sleep. LOL
M


Not so fast !

You are now the living Dellorto expert. :evil:

Don't hide 'em, Ride 'em !!
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