How do you tell what carb you have

[kevinx]

I have a 1E40QMB Motor and would like to know what size carb i have

[90GTVert]

The 1E40QMB, and many other engines in scoots, can come with different carburetors. You're best bet for looking it up would be to try and find out if anyone knows what carb/carbs were used on your specific model. If you can't find any specs, you'll need to measure.

You should measure where the carb inlet intersects the slide (in mm) to determine the size of your carb.



If you dont have a mics to get in there and measure accurately, you can get an idea from measuring the slide or the outlet bore (where it mounts to the intake manifold).

[kevinx]

I took this from a vento zip manual has same setup as my scooter
Manufacturer and type: side draft
Identification: PZ19JB
Venturi:19mm
Main Jet Size:#80
Pilot Jet Size:#57.5
Neddle position: 3rd groove from top
Idle air adjusting srew: open 1 1/2 tp 1/2 turnout counter clockwise
Float Hight: 13+-mm

[90GTVert]

It may or may not be that size though. I have Vento Triton with the same basic setup you have and it could come with either a 17.5mm or 13/14mm carburetor from what I have heard. This 17.5mm carb was also on some Vento Zips from my understanding. I hope you do have the bigger 19mm carburetor, but I would not count on that to be accurate for your scooter. My theory is that the carburetor used on a lot of the cheaper scoots depends on what's left over from other production or what's cheaper to do at the time more than what is the best carburetor for the job. Hopefully I'm wrong. You also got your scoot from a place claiming to put a big bore on it and other mods I'm sure. Maybe they have changed the carburetor? Who knows?

[kevinx]

True who knows what is on the scooter i seen the same scooter on other sites and they called it a turbo scooter i just hoping it is a 17.5mm carb.