darmah with 40mm dellortos is it worth it?
darmah with 40mm dellortos is it worth it?
i bought my ssd with 40mm carbs on it and contis .Does this bike prefer smaller carbs for the midrange as im thinking big carbs work at big revs and with hotted cams etc. I spend the majority of my time not on full throttle, would i be better off with 36 32s. Are the cams on the darmah the same as ss. Any advice , experience , ideas?
I've yet to see a Darmah or SS Idle very well with 40's The 32's are much more tractable at lower speeds and the chokes improve cold starting and running. If you have the 32's I'd install them and see if you like them. It's my understanding they are getting kind of hard to find. The 36's will work ok but you might have to change the manifolds as the new 36's are spigot mount instead of clamp mount. Unless you can find some carbs off an Alazzura I think they will fit right on. I'm pretty sure the cams are the same,if the paint marks on the end are blue/ black.
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Nah its gata be delortos you wont find jap carbs on my bike
Here is one for you these are 40mm carbs taken out to 42mm , the bell is bolted into place and plugs have been added where the screw hole used to be ,the intake has also been taken out to 42mm, the carb and bell were then spun on a lathe you can not see the fine line in the pic's but it is there you can not feel the change over from bell to intake same with the bolt plugs
check the spring difference and the slide diameter over a std 40mm slide
We took the engine apart to fix an oil gallery leak and found it had a 3.5k crank and rods in it , I didnt get the chance to take a good look at the heads, but I would say that they have been ported as well , still finding out what cams are in the beast
It turns out that this engine is a race engine that has had major work done to it
Sorry Faceache for high jacking your post
Your SSD will run fine on 36's or 40's
cheers
Here is one for you these are 40mm carbs taken out to 42mm , the bell is bolted into place and plugs have been added where the screw hole used to be ,the intake has also been taken out to 42mm, the carb and bell were then spun on a lathe you can not see the fine line in the pic's but it is there you can not feel the change over from bell to intake same with the bolt plugs
check the spring difference and the slide diameter over a std 40mm slide
We took the engine apart to fix an oil gallery leak and found it had a 3.5k crank and rods in it , I didnt get the chance to take a good look at the heads, but I would say that they have been ported as well , still finding out what cams are in the beast
It turns out that this engine is a race engine that has had major work done to it
Sorry Faceache for high jacking your post
Your SSD will run fine on 36's or 40's
cheers
As soon as Phil @ R & R sends me a 32mm inlet manifold my darmah will have the 32's back on. Standard Darmah with 58 mm stud spacing cannot vouch for the originality of this though. With the 40 mm's idles like a pig hates to be ridden in town great, no choke Looking forward to trying the 32's next week
A guy here ran Mikunis on his 900, he said once they were set up properly they were far better than the orignal Dellortos, it started better, it idled better, it was more economical and made more powerMartin Mille / SSD wrote:Nah its gata be delortos you wont find jap carbs on my bike
I'm not a purist I'll use what works best regardless of country of origin and I'm told I can get good results with 41mm Keihin FCRs
I had 40mm Dellorto on my Darmah and always intended changing to something smaller, it idled ok, but was always a bastard to start and with stock heads I doubted there was any real benefit and it'd only run about 140km to a tank before reserve when thrashed
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I think it depends what you want to ride. I look at Bill's earlier comment and i have to agree. As an owner of 3 darmahs and having messed around a lot over 30 years of ownership, I've come to the conclusion that the 32mm doesn't give away much, and starts better, idles better and is far more city tractable than a 40mm setup.
Kev
Kev
My '80 900SS has 40-mm carbs and idles consistently after a couple of minutes warm up. In comparison with a Darmah I had for several years, with 32-mm carbs, there is no difference in idle performance. The engine with 32-mm carbs felt crisper on partial throttle, but made considerably less power. Its a trade-off, and I imagine that 36-mm carbs on the manifolds intended for the 32's would be a reasonable compromise if you ran across a set... Buy a ratty Cagiva Alazzurra and swap the carbs :-)
If you want a gentlemanly bevel Ducati, try a 750GT with 30-mm carbs and mild, original cams. When set up properly their refinement reminds me of a 60s BMW, only smoother and with (slightly) more power. I think a lot of people have forgotten that the first Italian twins were not intended to be fire breathers, examples being the 750 GT, Guzzi V7, and early Laverda 750. Any of the three (especially the Laverda) will idle at ridiculously low speeds.
A Darmah engine has the same cams as an SS, unless the SS is fitted with the so-called Imola race cams. Neglecting the different side cover and electric start, the principal differences between the Darmah and SS engines are the quality of the con-rods and the manifold stud spacing, but during the course of Darmah production those differences went away and it morphed into an SS-spec engine with electric start. It made no sense to produce two slightly different variations of essentially the same desmo engine.
If you want a gentlemanly bevel Ducati, try a 750GT with 30-mm carbs and mild, original cams. When set up properly their refinement reminds me of a 60s BMW, only smoother and with (slightly) more power. I think a lot of people have forgotten that the first Italian twins were not intended to be fire breathers, examples being the 750 GT, Guzzi V7, and early Laverda 750. Any of the three (especially the Laverda) will idle at ridiculously low speeds.
A Darmah engine has the same cams as an SS, unless the SS is fitted with the so-called Imola race cams. Neglecting the different side cover and electric start, the principal differences between the Darmah and SS engines are the quality of the con-rods and the manifold stud spacing, but during the course of Darmah production those differences went away and it morphed into an SS-spec engine with electric start. It made no sense to produce two slightly different variations of essentially the same desmo engine.
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