Motorcycle Air Fuel Mixture Screw, Keenso FCR Carburetor Carb Mixture Screw Pilot Screw Adjuster for Most Common 4 Stroke Models (Black)

This stock jet normally falls out of the bottom of the carb making the bike suck in air and ultimately run really bad. I bought my bike and the guy said it was running rough. I thought about this jet immediately and looked for one and didn’t see one. (Didn’t tell the guy because this bike was cheap for this reason) I ordered this jet and now have a perfect running bike for cheap that sat for years because of this jet! Keep an eye out for it and makes sure you get that rubber in there with it!

Works great for tunning. For machines you are forced to remove the jetting to adjust it, this helps a ton. Helps with not having to remove the whole carburator

The threads were to fine so it didn’t work but the build quality was nice

Installed on my 01 YZ250f. The grooves cut into your thumbs when you try to tighten the screw (because the spring is so stiff). Additionally, on my bike model, the carb must be loosened and rotated in order to even make an adjustment to this screw. I give it 1 star. Not a well made product in my opinion.

I purchased for my DR Z400S. Removal was difficult and I would recommend being very diligent to not lose the old one. It's easy to adjust with it on the bike.

2008 CRF150r. OD of washers included in kit were larger than threads, unable to use. Spring is so tight I am unable to turn without pliers, machining on knob is so sharp I had to hit with a file to prevent cutting fingers. Very inexpensive comparatively, but in hind sight I would definitely buy a more expensive “name” brand unit as it is basically rendered useless based on the spring and too tight to turn with fingers

Great being able to dial in the pilot mixture with not tools.

Worked perfectly. Installed one on a 04 YZ250f and one on my yz450f. Won't have troubles getting a grip on it that's for sure kinda sharp.

Venía doblado y las tolerancias no eran las aptas para ajustar la mezcla de aire-combustible.

This does not fit a GIO 250cc x31 in case anyone wants to know. The threads are not quite right.

Lo pedí domingo y me llegó el lunes, todo perfectoLlegar y montar

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Works really well on my 2010 yz250f, only complaint is the spring is a bit big and the knob is pretty sharp