Dellorto SI26 -any good?

[Svint1]

Gents,

I'm currently using a PHBH30 on my 60mm longstroke Polini208 engine. The exhaust is PEP2, but a Sip Road arriving next days..

I think it might is a overkill with 30mm (and the induction noise kills me!), so I'm thinking of a Dellorto SI24 or 26.

Had a SI24 some years ago, but it didn't cool the engine enough, so had some heat-seizures on long motorway trips.
-thought then that a SI26 would be better?


But does anyone know of the quality of the Dellorto SI26 carbs?

And how would it be to jet it for my engine?

Rgrds,
Øyvind

[sean brady scooters]

its nothing to do with the bore size of the carb that cools your scoot and prevents siezes its the jetting /setting up

[Svint1]

its nothing to do with the bore size of the carb that cools your scoot and prevents siezes its the jetting /setting up

OK, but I read somewhere that the SI carbs was no good of cooling engines, due to the "short" manifold, meaning a PHBH with a Malossi or polini inlet manifold, would cool better.
True or false?

But if a SI is good enough, fine with me!

But how should I then jet a SI carb?

Setup is as mentioned above, and the casings are mildly ported to the sylinder, but nothing in the inlet.

Rgrds,
Ø

[gaz_powell]

24 or 26 will be suitable as long as it is jetted correctly

would imagine 140/be3/132 then come down on the main and up the pilot by slightly should be a good start

i`ve used both and found no difference with the 26 over the 24 both were spaco