just wondering what the best carburetta is for a kitted vespa px - i'm putting a pinasco 177 on my Armando's Project but dunno which carb would be best

i've read different things from different manufacturers - i know a lot of people like dellorto's but i've heard they're really hard to set up and i would like one that isnt too hard to setup cos i'm only used to the dellorto SI style carb

also is a read valve worth the hassle or not - i want the engine to be really good at cruising at highish speeds on motorways for long periods but i'm not too bothered about the acceleration so much

I reckon a good carb for that setup would be a dellorto vhst 26, Thats about the ideal size.
Doesnt matter what carb,manufacturer ect, they need setting up. Set it slightly rich tho. Keihins and I think Mikuni's dont have a good midrange which is what you need for touring
best to go dellorto imo

i was looking at a keihin lol

i know they'll all need setting up and its all trial and error, but the dellortos have loadsa jets dont they? 1 idle, 2 main and a slide jet, and then mixture screw aswell from what i remember?

is the vhst a flat slide?

All carbs have a pretty large selection of jets, needles, slides, ect

The vhst is sorta like a flat slide,kinda ovaled. You get better throttle response with this than lets say a phbl 26 round slide carb.

Re the reedvalve. This helps midrange, lowdown grunt alot. But theres nothing wrong with keeping it rotary, Its one less thing to go wrong with rotary if your touring alot....You dont want to get pettle flutter and petals breaking when blasting down the motorway, not that this happens alot its just one thing to consider that could happen.

ahh right, i thought you got better response outta a flat slide though cos it lets more air through in one hit?

how much low end grunt would a reed valve add though, cos if i'm cruising at lowish revs it'd probably be better to have so much grunt there wouldn't it?

won't take too long setting up your carb, buy a set of main jets and put in the recommended ones for your kit like idle jet and starter bla bla.
Then it's just a good play with the main and the mixture screw.
But i imagine you already know that

yea, i know how to do all that easy on the SI style carbs - but on the bigger ones everythings different and theres more than 1 main jet on some of em, so i dont know where to start really

My ten penneth is don't bother with a big carb on a pinasco kit. The most you'll get is a lot of noise and a less fuel in yer tank. SI24e is the way to go, they're less hassle setting up as you don't need to tit about with needles etc, it's only really your main jet that needs swapping from the std 24e jets on the majority of 125 block kits plus you'll get a much better low-down response than you would off a big carb and/or reedvalve.

plus one, p2 carb, saves you time and money

i've got a si24/24 on me malossi 166 but that aint ported or out - i thought the bigger carbs were sposed to be better on engines thats been tuned fully though

Personally i would look at having your crack cut and choosing the right exhaust for what you want out of your engine

NorthernJordan wrote:Personally i would look at having your crack cut and choosing the right exhaust for what you want out of your engine

I like to keep my crack as pure as possible lad...

but aye he has a point - the type of exhaust will have a bigger influence on the overall performance of your scoot, once you've got that as you like it then look at having your inlet timing opened up a bit you'll actually get more fuel into the cylinder than by slapping on a big carb

2ToneJake wrote:i've got a si24/24 on me malossi 166 but that aint ported or out - i thought the bigger carbs were sposed to be better on engines thats been tuned fully though

Aye and don't be a fanny - get yer cases ported

Wally wrote:

NorthernJordan wrote:Personally i would look at having your crack cut and choosing the right exhaust for what you want out of your engine

I like to keep my crack as pure as possible lad...

but aye he has a point - the type of exhaust will have a bigger influence on the overall performance of your scoot, once you've got that as you like it then look at having your inlet timing opened up a bit you'll actually get more fuel into the cylinder than by slapping on a big carb

So are you agreeing with my crank cutting comment?

NorthernJordan wrote:

Wally wrote:

NorthernJordan wrote:Personally i would look at having your crack cut and choosing the right exhaust for what you want out of your engine

I like to keep my crack as pure as possible lad...

but aye he has a point - the type of exhaust will have a bigger influence on the overall performance of your scoot, once you've got that as you like it then look at having your inlet timing opened up a bit you'll actually get more fuel into the cylinder than by slapping on a big carb

So are you agreeing with my crank cutting comment?

Yarp