Which carburetor on MC-54-250B?

[josetann]

I may need to buy parts for my carburetor, or even the whole carburetor itself. I have searched for about an hour but still don't know exactly which carburetor the 250B comes with. I do know that there are two types of carburetors, one designed for the linhai (what a "real" 250B should come with) and one designed for the cfmoto. I have the "real" 250b with linhai engine and proper carb (air mixture and idle adjust screws are on top within easy reach).

I was able to find out that it's a Keihin, but have found no part number. Closest thing I found was someone stating an online dealer showing it as a 30mm Keihin, but we know how accurate dealer's published specs can be (and shouldn't there be more info than just 30mm?).

What I'm thinking of doing, is pricing the appropriate carb for my scooter, then take it down to someone who is willing to work on it. If they say it's going to cost big $$$ and I know the whole carb would cost that much or less, I'll just leave and be back on the forums here, asking for advice on replacing a carb . If they have no idea what to order parts for, I can tell them which carb it is, and then see how much it'd cost.

BTW, anyone wondering, the part that's messed up is the accelerator pump, it's leaking gas whenever the throttle is twisted (already posted here asking what on earth was leaking, and thanks to everyone here I now know).

[earlwb]

If your scooter uses the Linhai clone engine and uses the Linhai yamaha clone carb,
then maybe using www.roketa.com might work.
They do show the carb in their parts section here:
roketa.com/product/parts_detail.jsp?partId=30732&partName=ENGINE%20ASSEMBLY(3)
But I don;t know if they have them or not.

[josetann]

Is there not a part number? Is it a carburetor that is only made for this type of scooter, so there's no chance of finding it elsewhere?

[earlwb]

The carbs are copies, you are lucky if they even have anything on them at all as to markings.
Everyone likes to show a picture of a real keihin carb made in Japan, but they are actually selling the Chinese copies.
Part numbers? Every brand has their own part numbers for the same thing in most cases.
The Honda design carb is cloned a lot, and is fairly easy to get. The Linhai-Yamaha design clone carb is harder to find.
The stock 250's all use a 30mm bore carb. So there are a lot of choices if you want to go with something different. You only need to figure out how to mount the carb, hook up the throttle, and what size main jet to use.

[josetann]

I had a long reply typed up, but found out some more info.

I see a lot of dealers are stating the carb is simply a PD30J. Found one dealer that stated this, and had a picture of the entire engine assembly (including carburetor), and it looks like mine. I will assume the carburetor I have is a Keihin PD30J (sure, it's probably a clone).

Keihin's site says nothing about a PD carburetor, maybe it's a discontinued item? It's nearly impossible to find anything about a 30mm Keihin PD carburetor. I did find this site here: www.keihinfie.com/html/pdtype.htm , but unless I'm mistaken it's not the same type I have.

Argh! This is so frustrating! If I knew what carb I definitely had, AND if I was able to find a rebuild kit for it, it should have the part I need. Why do they make it so hard?

[josetann]

Ok, I found the manufacturer at least, it's HLIC, website is www.hlic.com.cn/en/PRODUCT/en_product.asp . Unfortunately, the carburetor isn't listed on their site anywhere. Just figured I'd share what I found out, in case anyone else wants to pick up where I left off.

[earlwb]

One thought is to check the motorcycle salvage yards and see if anyone has a totaled out Yamaha Majesty or Mopheous laying about. You could get the real Japanese carb that way.

Same thing if you want the other carb, look for a Honda Helix or Reflex that is being parted out.

[WarrenS]

All Majesty and Morphous in the US are fuel injected.

[josetann]

Aug 11, 2008 11:48:45 GMT -5 WarrenS said:

All Majesty and Morphous in the US are fuel injected.

I know the Morphous is, but I know the Majesty came with a carburetor (at least the service book for the 96 model shows the carburetor). I think the size is a little off, but it looks exactly what I've got. Gives me another option to look at.

[earlwb]

I think the Japanese changed their designs as soon as the Chinese started copying some of their stuff. So you would have to look for the older obsolete designs to see the carbs.

I think the early or older Yamaha scooters used carbs. But when the Chinese started copying their designs, they quickly switched to something else like EFI.

[videoman]

If you can find a Walbro carb, the would be your best choice, before I bought me MC54, I owned a 49cc scooter by Meitian, it also had a crappy carb that would act up when I started the scoot cold, the idle was all over the place, it would start normally, then would slow waaay down and stall. Had to restart several times and give it gas to keep it running until it warmed enough. As soon as I replaced the cheap Chinese carb with the Walbro, the bike would start and the idle NEVER faltered or stalled while it warmed up. I guess you get what you pay for. I know Walbro makes a carb for the 150cc Bali, but I don't know if they make one for the 250cc.

[WarrenS]

Aug 11, 2008 13:48:00 GMT -5 josetann said:

Aug 11, 2008 11:48:45 GMT -5 WarrenS said:

All Majesty and Morphous in the US are fuel injected.

I know the Morphous is, but I know the Majesty came with a carburetor (at least the service book for the 96 model shows the carburetor). I think the size is a little off, but it looks exactly what I've got. Gives me another option to look at.

I stand by my previous statement. I do not believe a Majesty was imported into the US prior to 2003.

[bluegoat05]

the majesty has a carb i just get the slide diprham from a 2006 to replace the torn one i have in my 2008 vog 260

[bnasty3600]

My other post is gone where I stated that the pd line of carbs is a copy from an older keihn carb series. I have a keihn carb on my roketa, but had alot of problems getting it to fit and setting up lines. I had a parts number for you to look at but I guess that isn't allowed. Anyway good luck.