Mikuni RS36 carbs

Laverdalothar said:
I don't have air-filters installed on mine so I can't tell if they fit 100%, but I think I saw several with Mikuni and original rubber connectors (to be confirmed by others, please).

The jetting is close but depends a bit what you have (which cams, ccm, etc.) There is some knowledge on this forum that might be shared if you kindly ask. Else, anyone with Experience with Mikunis should be able to set them up
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Thanks, I was hoping I could change only the carbs and retain the airbox.
 
I checked out the Topham kit, and while Red's is certainly more expensive I'm betting it's money well spent as it's thoroughly researched and very comprehensive, leaving little if nothing to chance. I'd also like to keep the stock airbox, but I doubt I'll miss it if I take the plunge.
 
murphus said:
I checked out the Topham kit, and while Red's is certainly more expensive I'm betting it's money well spent as it's thoroughly researched and very comprehensive, leaving little if nothing to chance. I'd also like to keep the stock airbox, but I doubt I'll miss it if I take the plunge.
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If it comes with spigots it would save me a few bucks since the last time I had the carbs off I noticed that they were beginning to crack in a couple of places. It didn’t appear to be all the way through, but I put black sealant on those areas anyway.
 
RS36 on 3C with airbox and rubber connectors. Inlet stubs by Topham, airbox housing slimmed down a bit to create a bit of space to ease installation of the rubbers, no filter element installed.

DSCN8319.JPG

piet
 
Red's RS36 kit with angled manifolds is a very worthwhile addition to your bike. Much better fueling, more stable settings, much better build quality, than Dells. Highly recommended as it's a modification that affects 100% of your riding time.

FWIW, you cannot use stock RGS intake rubbers and airbox; the angles between airbox holes and carb intakes don't play.
 
ksoholm said:
Red's RS36 kit with angled manifolds is a very worthwhile addition to your bike. Much better fueling, more stable settings, much better build quality, than Dells. Highly recommended as it's a modification that affects 100% of your riding time.

FWIW, you cannot use stock RGS intake rubbers and airbox; the angles between airbox holes and carb intakes don't play.
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Won't the Topham gear as posted by Piet do the job?
Paul
 
Paul Marx said:
Won't the Topham gear as posted by Piet do the job?
Paul
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Probably. Haven't tried it on a 120, but the basic dimensions are the same for 180s and 120s.

I had the RS fitted to stock "Jota" stubs and rubbers without issues before the Topham variety became available.

piet
 
I am sure that a bank of Mikuni carbs deliver a far superior mix of fuel and air but having seen them in the flesh, fitted to triples, they just look wrong. ' A monstrous carbuncle on the face of an old friend ' might be over doing it. It's just that dells look right for the machine. Even the name 'Dellorto' seems to evoke the era and the region whereas the name Mikuni for all its undoubted technical superiority is more suggestive of a reliable washing machine.
 
Perry said:
I am sure that a bank of Mikuni carbs deliver a far superior mix of fuel and air but having seen them in the flesh, fitted to triples, they just look wrong. ' A monstrous carbuncle on the face of an old friend ' might be over doing it. It's just that dells look right for the machine. Even the name 'Dellorto' seems to evoke the era and the region whereas the name Mikuni for all its undoubted technical superiority is more suggestive of a reliable washing machine.
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Well said, and mirrors what I think about my '95 BMW K750, with its engine that has all of the sex appeal of an air compressor. And yet ... in both cases there's a case to be made. On an RGS at least you can't really see them unless you look hard, but I will say it was the "look" of Mikuni VMs vs. the stock Bings that kept me from putting them on my '73 R75/5 for a long time. But once I did, I never looked back, and only people who know BMWs notice they're not correct.
 
Perry said:
Even the name 'Dellorto' seems to evoke the era and the region whereas the name Mikuni for all its undoubted technical superiority is more suggestive of a reliable washing machine.
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You are a old romantic Perry. According to Google translate Dell orto means "From the vegetable garden" in Italian. I think that is probably in keeping with Laverda having been a maker of agricultural machinery don't you ? So it's washing machines or tractors, you takes your pick.
 
Perry said:
I am sure that a bank of Mikuni carbs deliver a far superior mix of fuel and air but having seen them in the flesh, fitted to triples, they just look wrong. ' A monstrous carbuncle on the face of an old friend ' might be over doing it. It's just that dells look right for the machine. Even the name 'Dellorto' seems to evoke the era and the region whereas the name Mikuni for all its undoubted technical superiority is more suggestive of a reliable washing machine.
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Better get rid of those Nippon Denso and Bosch parts quick smart then, given the regions they evoke. :eek: 🤣
 
I'd be quite tempted by a set for my 3C. I'm quite convinced that along with the Ignitech, they'll make the machine more mellow. However, I've already thrown a lot of cash at that bike, but who knows....
The Ignitech is amazing. Was out yesterday evening with Corinne on the back. Two up therefore, the bike will pull from 1800 revs until the limiter where ever that's set.

Paul
 
Paul Marx said:
I'd be quite tempted by a set for my 3C. I'm quite convinced that along with the Ignitech, they'll make the machine more mellow. However, I've already thrown a lot of cash at that bike, but who knows....
The Ignitech is amazing. Was out yesterday evening with Corinne on the back. Two up therefore, the bike will pull from 1800 revs until the limiter where ever that's set.

Paul
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rev limiter is set at 8,500 rpm Paul
👍
 
Alzero said:
I thought that this was something that ALL bikes were expected to do. Sort of the bare minimum of driveability for any engine. Are you saying that before installing the ignition it didn’t?
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Well all bikes certainly don't. I won't evoke race engines of course.
Do that on a classic sporting single and you'll be rebuilding the big end every other week end.
Even a modern single won't like it.
My 750 Laverdas wouldn't like it much either.
I'm not sure my 2016 Aprilia 750 would be capable of that with the standard ECU.

As for my 3C with the original ignition, I bought it as a non runner but I had a brand new 3CL in the early 80s so memories are vague but I wonder if it wouldn't knock under load at those revs?

Paul
 
Any opinions on replacing my originals with new PHF32s? There's a fellow in Italy with whom I've dealt before, $804 for 3 delivered. They are standard cable-operated type so the domes/linkage would have to be swapped over. When I last had my carbs apart, which wasn't too many miles ago, the linkage and such all appeared to be in excellent shape, but ... And of course the ones he has would all be handed the same, with mixture screw on the same side.
 
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