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Carb Parts

Keihin CV 40 Tuner Kits

It’s our opinion, and that of experienced tuners, that drilling the air-port in the slide or replacing the spring with a lighter version is detrimental to the CV carb.
They are designed to maintain constant velocity, proportional with the engine’s demand for air/fuel, and should not be tampered with in that regard.
All these carbs need to out-perform the others, is correct  etting and needles.
We offer a few simple kits that will ease the task of jetting for you.

HQ-2500 This is a great kit for        warming up a stock Evo 1340. Works   well up to 9.5:1 compression.
Includes #45 slow jet, yellow HQ needle and washer, #175 main jet and instructions.

HQ-2505 This is 10:1+ compression in all Evo Big Twins.
Includes #45 slow jet, blue HQ needle and washer, #180 and 185 main jets and instructions.

HQ-2510 Sportster 1200 and 883 to 1200 conversions.
Includes #45 slow jet, blue HQ needle and washer along with a #175 main jet and instructions.

HQ-2515 For Buells
Includes #45 slow jet, blue HQ needle and washer along with a #195 and 200 main jets and instructions.

HQ-2520 This is a great kit for        warming up Twin Cam 88 and 95.Works well up to 9.5:1 compression.
Includes #46 slow jet, blue HQ needle and washer, #180 main jet and instructions.

HQ-2525 For Twin Cams with port work, cams and compression increases.
Includes #46 slow jet, red HQ needle and washer, #195 and 200 main jets and instructions.