Air Fuel Mixture Screw for Keihin FCR Carb for Honda CRF150R CRF150R for Yamaha YFZ450 YZ250F YZ426F YZ450F for Kawasaki KLX450R KX250F KX450F for Suzuki RMZ250 RAMZ450 (Black)

If you're still using a tiny screwdriver to adjust your FCR fuel screw, you're doing it wrong. I installed this on my Yamaha YZ, and it’s a game-changer. The extended knob allows for quick, tool-free adjustments whenever the temperature or elevation changes. It fits perfectly into the Keihin FCR body and feels very secure. I bought 4 of these to keep as spares in the shop—definitely worth it for the convenience alone!

Works better than oem

I bought the wrong one. The thread was finer than what’s on my carb. It light aluminum cheap product but I knew what I was buying as far as that goes I just purchased hastily and without examining the fitment. Figured 3 stars was a compromise for my error without 1 starring a company who did everything that’s to expected. Wont return cause it is not that serious. You live you learn. Or don’t. No need to tie up delivery services over 7 buck.

Fits my 08 yz250. Seems to be pretty durable and I haven’t had any problems with it vibrating out like other brands. Easy to adjust so overall a good product.

Worth getting price was affordable fit right for the carb i have way easier to adjust and doesnt wonder like other mixture screws ive dealt with

This didn't fit the bike that I ordered it for, but it did fit another one that i had. this is super nice for tuning, but i dont think that i would run it while riding, just to get the amount of turns, then put the normal needle back in.

Didn’t fit my 2006 kx250f came with a spring and three o rings. Didn’t even have the washer. Wouldn’t threat in just junk. Don’t buy.

Did the job my old one fell out put this one in perfect

Fits perfectly on 2003 YZ450F stock carburetor