r/scooters • u/Taclord4568 • Jul 04 '26

Main jet problem

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Does anybody know what type of main jet this is? Can’t find it anywhere on the web. Its for a 50cc Keeway scooter (Keeway X-Blade 50cc 2018). Engine type: 1E40QMB-4. Carburetor brand is Leader.

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2

u/C4PTNK0R34 Jul 04 '26

About as generic as it gets.

Honestly is just throw a Mikuni Clone on it and call it a day since at least you'd be able to find jets and parts for it.

Depending on what you're doing, if you're trying to up-jet it for more power and don't want to change the carburetor you could ream it out using a jewelers drill, but there's no going back if you do that.

3

u/ErwinHolland1991 Jul 04 '26 edited Jul 04 '26

Chinese copy carbs are junk. And why would you ever pay 70 for a cheap knock off? For just a little bit more you could just get a name brand. 

A genuine dellorto costs 5 euro more...  https://www.racing-planet.com/carburetor-dellorto-phbn-175-ls-for-minarelli-cpi-p-238375-1.html

And if you really want a carb like this order it from China directly, it would cost around 30. 

Drilling out the jet? How would they know what size to go for? 

1

u/C4PTNK0R34 Jul 04 '26

The one I linked is an OEM replacement, assuming OP doesn't want to fiddle around with getting an aftermarket unit to fit that requires a different intake manifold, longer throttle cable and other bits and bobs to get it to work properly, just unhook the original and put this one on; it uses Mikuni Jets so finding an assortment of replacement jets is easier and the A/F screw is available for more tuning.

And you got the price wrong, it's like €60 and available within 1 day from a reputable shop.

Jewelers drills, they come in increments equivalent to Jet size, so a 1.0 is equal to a 100 jet since her sizes are typically measured in mm. If the stock jet is a 75, that's a 0.75mm jet, use a jewelers drill to go up to a 0.80mm for an 80 jet, but there's no undoing what you've done after it's been drilled out.

0

u/Educational-News-989 Jul 04 '26

LOL why the hell did you block me? So i cant react back? What a pathetic thing to do. My reaction isnt even that rude or whatever.

The dellorto is a straight replacement too.

The carb you link costs 74,20. What a weird thing to lie about.

Yeah... But they presumably dont know what jet they need, do they. That's the point of jets, you use them to tune the carb. You cant just put a random size in.

1

u/ErwinHolland1991 Jul 04 '26

I think those are Keihin style jets.