ZRX1200 Carb Conversion

[IanDMacDonald]

TADracer I noticed you left your ACV tubing in-place. Can I delete the tubing, and cap the ACV ports?

[Bonz]

I have Keihin original mains 128, 130, 145, 150, and larger. That brackets the sizes you're looking for, but if those would help you, me know.

I've adapted Keihin CVK40s from the ZX11/ZZR1200 to the ZRX and they use the same jet styles as the stock ZRX 36mm Keihin carbs. Bought lots of jets over the course of the trial and error. Finally spent money on an air fuel ratio gauge, it would have saved me more money in jets than I bought the gauge for lol.

Rocky Mountain ATV sells the main jets individually for $7.99 a piece. Look under the carbureted Kawasaki KLR 650 and it's the same jets. The 393 series. I looked and they're the same back to at least the 2000 model year KLR 650.

N424-25B is the pilot jet, same ones for KLR 650 will function there as well. Rocky Mountain ATV has those in 35, 38, 40 and larger. Shouldn't need bigger than a 35. $7.99 piece as well.

If the ACV's are in place, no harm no foul. If want to cap them, no harm no foul there either. Might get a bit more popping on decel.

You will like the needle valve seats, they are pressed into the ZRX carbs don't have to worry about those o-rings.

[IanDMacDonald]

I have Keihin original mains 128, 130, 145, 150, and larger. That brackets the sizes you're looking for, but if those would help you, me know.

I've adapted Keihin CVK40s from the ZX11/ZZR1200 to the ZRX and they use the same jet styles as the stock ZRX 36mm Keihin carbs. Bought lots of jets over the course of the trial and error. Finally spent money on an air fuel ratio gauge, it would have saved me more money in jets than I bought the gauge for lol.

Rocky Mountain ATV sells the main jets individually for $7.99 a piece. Look under the carbureted Kawasaki KLR 650 and it's the same jets. The 393 series. I looked and they're the same back to at least the 2000 model year KLR 650.

N424-25B is the pilot jet, same ones for KLR 650 will function there as well. Rocky Mountain ATV has those in 35, 38, 40 and larger. Shouldn't need bigger than a 35. $7.99 piece as well.

If the ACV's are in place, no harm no foul. If want to cap them, no harm no foul there either. Might get a bit more popping on decel.

You will like the needle valve seats, they are pressed into the ZRX carbs don't have to worry about those o-rings.

I appreciate that very much. I ultrasonically cleaned the carbs. I just spent $150 at MikesXS for pilots and mains (38/40/42/45 pilots, 135/138/140 mains). I DO have two A/F gauges with an O2 sensor, but I'm using the original exhaust on the XS, and would feel bad cutting a hole into it for the bung. I ordered an o-ring kit from Kwick, along with the block-off plate for the K-TRIC. I did forget to buy o-rings for the ACVs. I'll circle back to that, and emailed Pete from Kwick, to see if he could add it to my order.