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Tune your bike for exceptional performance.
WEIYINGSI is a company that develops aftermarket spare parts and accessories to breathe life back into Powersports vehicles. For thousands of clients and customers around the world, WEIYINGSI has been synonymous with adventure and passion, whether in the realm of work or play. Manufacturing and providing our innovative line of WEIYINGSI brand-quality products to the world is our passion and our calling.
Whether it’s more power or being more fuel-efficient, we have your needs covered.
Engineered for accurate fit and stable fuel injection volume.
With this 10-piece kit, you’ll have various sizes to choose from.
Comes in a hard case packaging to protect against damages.
Installation: remove the carburetor from the bike, disassemble the bottom case, and remove the old main jet using an M8 wrench and Philips and flathead screwdrivers.
Choose the appropriate jet size and install it into the carburetor. Do not overtighten to avoid damaging the threads.
Assemble the carburetor and start the engine. Adjust the screw until the desired idle speed and mixing ratio is achieved.
Get the most power and mileage out of your ride.
Thomas
Reviewed in the United States on December 7, 2023
These worked great. Made my Hawk 250 much faster and responsive.
BFC
Reviewed in the United States on August 19, 2020
The number of jets in the kit. Used to re jet the VM22 carb. The main jet as supplied was to big and would load up at part throttle. Dropped to a number 88 and runs perfect now.
Adam
Reviewed in the United States on July 27, 2020
These fit perfectly in my vm26 mikuni roundslides off my 1975 kawasaki s3A. Some people stated they did not thread in properly but the old style carbs use what is known as "reverse" or "large round" jets (which are these jets) and some of the newer round slides are using the "amal" or "large hex" jets. It all depends what series needle jet the carb uses and the two have different threads to prevent people from mixing them, so make sure to verify which stlye you have installed first because you will damage your threads if you force it in. I have the older style so everything in my case fit perfectly, threaded in smoothly and all the number stamps can be read easily. These are an amazing deal in price compared to OEM mikuni jets also. I will be sticking to this brand from now on.*This review was written AFTER I used and tested these jets.
Isaac Klar
Reviewed in the United States on October 22, 2020
These jets are a bolt on install for the Hawk 250 carburetor and would be for most carbs I assume. The jets work great and (thankfully) are labeled with their sizes. They come in a small case that I now keep all small carburetor parts in.
A. Wynn
Reviewed in the United States on September 8, 2019
Took a gamble on these given other reviews and some general googling on what jets fit the factory original carb on my 2004 ttr125LE.Bike was bogging on anything more than half throttle. Removed the snorkel in the airbox since I had to re-jet anyway, I might as well. Adjusted the float to level, installed a #20 pilot to fix cold start issues, and installed the #110 main from this set. The jet fit fine.Works great now, and no bogging anymore. :)
Hawk jockey
Reviewed in the United States on June 27, 2019
10 sizes comes with a plastic container to keep them from getting lost or dirty. A good value for the money and easy to install. Snug fit for the last thread or two but seats fine without forcing it.
ChrisWNY
Reviewed in the United States on July 24, 2018
It's nice to have an assortment of Mikuni VM jets at a good price, but be aware that these main jets do not thread in very well into a Mikuni carb. Removal of these Wingsmoto brand jets is not easy and you're likely to mangle the brass flathead slot when doing so. These are not Japanese/Mikuni brand main jets, they're probably manufactured somewhere in China so the machining on them is likely inconsistent.I bought these for a Mikuni VM26 30mm carb, and installed the #120 main as the Hawk 250 engine runs too lean on smaller main jet sizes (stock is #100, you definitely want to go up from there). When upgrading the exhaust pipe on the Hawk 250, it's essential to re-jet to a larger diameter main jet. For me the #120 seems to be the sweet spot, for others (especially at higher elevations) the #110 or #115 may be more appropriate. YMMV. Overall not a great product but not a bad one either. Use with caution.
Walking Sticks
Reviewed in the United States on October 5, 2018
As someone else discussed the threads are not exactly correct with the jet holder. I put a 115 in my Mikuini and it went well for about three turns and got really tight. Since they were the only jets I had and they were there and I was there I forced them all the way down to seat the holder. Holefully. And it probably will be fine. But with that said I would never buy them again from this company. They stated that the jets fit but that's a very loosely made statement. Don't buy these because if you change jets often you are going to ruin your main jet holder. Just another example of a company that lies to sell you something. I tried the Mikuini jet that was in the carb and it felt like a fine watch. These suck. Don't but. You doubt yourself when you rejet it.
Customer
Reviewed in the United Kingdom on May 22, 2016
Good
Customer
Reviewed in the United Kingdom on May 10, 2016
A+
Dr. R. Kurz
Reviewed in the United Kingdom on April 8, 2016
Perfect set of jets giving potential to tune my carb much better.
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