

🏁 Race-Ready Power Meets Effortless Upgrade!
The Racing Carburetor 2 Stroke 19mm is a high-performance replacement part designed for 49cc to 80cc 2-stroke engines. Featuring a robust aluminum build, integrated air filter, and no-adjust throttle design, it offers easy installation and improved engine response. Ideal for motorized bicycles, it supports customizable jet tuning for optimal performance across different elevations and riding conditions.






| ASIN | B07989QWFH |
| Best Sellers Rank | #46,919 in Automotive ( See Top 100 in Automotive ) #93 in Powersports Carburetors |
| Brand | MaySpare |
| Customer Reviews | 4.0 4.0 out of 5 stars (1,936) |
| Date First Available | January 23, 2018 |
| Exterior | Aluminum |
| Is Discontinued By Manufacturer | No |
| Item Weight | 14.8 ounces |
| Item model number | US-49CC-R |
| Manufacturer Part Number | US-49CC-R |
| Product Dimensions | 2.89"D x 3"W x 4.8"H |
| Recommended Uses For Product | Motorcycle |
| Specific Uses For Product | Performance,Power |
| UPC | 729043161317 729043161331 |
| Vehicle Service Type | Motorized Bicycle |
L**M
Best for the Price
I've been trying to fix up all my toys for spring, ended up needing a carb. I looked around and this is the best for the price. I have likes and dislikes, Its starts super easy, the choke doesn't vibrate itself out of place, it is a good increase in filter size, and it doesn't stall out at low speed as much. Its jetted a little low for me, my top speed is 15 mph lower and I'm now at 22mph. For installation its pretty simple there is no need for instructions, just use the adaptor and pipe tape (tape up the inlet tube and put adaptor over and its good to install). AND DON'T OVER TIGHTEN IT, most people who own these bikes don't have mechanical experience and they don't realize no matter what your engine and all parts for it are probably Chinese so you need to just get it snug. And keep your old carb you might need to switch the cable holder.
J**.
Great item
Simple to install
K**N
Good carb but read my review first.
Carburetor isn't bad but dosen't come with any jets. I had to but a jet kit because the one jet in it is nowhere near the size for an 80cc. The jet size had to be reduced significantly to a #56, the stock jet was dumping an outrageous amount of fuel. This was purchased for a gas powered bicycle and after changing it the bike runs really good compared to the factory carb. When installing it do not crank on the screw, otherwise it will snap the carb mount. Be gentle with it plus it's not an off road machine so it will not fall off while riding down the street.
C**S
Not worth the money
Unfortunately it was raining when I received the new carburetor. So I never had a chance to try it before. I ran out of time to send it back. when I first opened a package it smelled like cigarettes. It was extremely hard to assemble. No instructions I had looked at it for about an hour to figure out how it worked. There was a broken gasket between the throttle connector and the body of the carburetor Don't know if its leaking air into the carburetor from that point. I tightened down the 2 screws tried the throttle it was stuck I disassemble the carburetor and found that the spring wasn't mounted properly I didn't run the cable through the spring. My fault. Had to change the throttle handle there was too much Slack in it. i had extra throttle handle i hooked it up and at work right. Lost power. Better gas mileage. Top end was slower acceleration slower, no power going uphill. Don't know if broken gasket has anything to do with this too late to send it back stuck with it
J**Y
Good
Ordered wrong part
5**5
choke is cheap and doesnt always stay, filters are impossible to find
choke is cheap and doesnt always stay when starting, filters are impossible to find, stock filter will get lost or rubber will fail and filter will fall off. ended up taking a mason jar lid, some metal zip-ties and a piece of foam filter material and ended up making my own filter that's stayed put with no problems. besides that bikes run great except for the issue with the choke.
K**B
I loved a great piece.
Excellent piece.
J**N
Works great!
Arrived just as described. Everything works and it started up immediately way easier than the stock one. It has a really nice idle as well. Great carb. Not sure the power difference yet because I haven't gotten to ride it more than a couple of minutes. Works great though. I ordered the intake elbow to account for the bigger air filter as well. That's why you don't see it on. Fit. Perfect.
W**M
This has turned into such a fantastic hobby. Ive been riding dirt bikes since 4 years old couldn't even touch ground when on it. Anyway i thought i would try an engine on a mountain bike. Wow! I couldnt believe it. Just a 66cc china toy motor on a 26" Huffy from 1989. After all done with some modifications of course. Motor ran ok but i wasnt able to get it to idle on its own. Before i even thought about the the main jet I ordered and installed upgraded to HP carb. Right away noticed a difference and motor idled on its own with no tuning. But soon relised i had very poor high end rpm. So i found out from the Awesome people that do videos on you tube the new carbs come with a jet not right for the climate hear in ontario. Long story short ordered 5mm jet set and installed a 68.. had a 72 i believe.. took it out for a run and it wound right out to max hp and cruises nice at 32 kms an hr..bike runs fantastic. Since then i discovered that the NT carb can use same jets and works good to.. Definitely recommend the Hp carb for the better filtering and easier air flow.. little 66cc motor really puts out. Ill add pic when I get home..
D**C
Do not but this product it is junk. I bought it and used it the clamp attached to the carb broke off making it unusable.
M**R
Good enough to make my bike idle 200 rpm lower and produce more low end torque, made going from a stop much faster, didn't really change high end much, but throttle response is definitely better with this carburetor, can feel power the moment I move the throttle instead of it feeling a little laggy Overall pretty good purchase, but tuning it with different size jets is never a bad idea, could end up with an even better carburetor just by making the jets slightly bigger or smaller
T**R
This is a good. Carburetor it increased my preformence by a lot , it has fast acceleration and breaks fast speeds . The only bad thing is that it's hard to assemble and their are no instructions and people install it wrong resulting problems . So dear seller please put instructions inside it .
H**L
It broke on the intake mount and it's very hard to adjust it, the adjusting screw turns by itself and gets Miss adjusted.
Trustpilot
2 days ago
1 day ago