TB 170cc, HC, Cam & 24mm Nibbi Kit – KLX140

TBparts high compression, forged, 170cc big bore, cam, & 26mm Nibbi carb kit. This will make your KLX140 a lot more fun to ride by adding some much needed power! Our new high compression forged piston is dome matched for the stock cylinder head to give you the ultimate high quality performance package. Combine that with our performance cam to really wake that KLX140 up! Our cam opens the valves up faster and provides more lift to let even more air and fuel in for even more power! Great for playbike racing and idles low enough to use on the trails too!

TBparts PE24 carb kit for Kawasaki KLX140. CNC billet aluminum intake manifold, hard anodized black with the TBparts logo. Port matched for the stock head and made for use with the PE24 carb. The bike will pick up power everywhere! This manifold kit does not reuse the stock airbox/tube. Ideal for KLX140s equipped with a big bore kit and or stroker crank!

Nibbi PE24 Carburetor. Nibbi helped perfect the simple design of the PE26! Starting with looks, they come hard anodized black. This helps with corrosion resistance, wear resistance, insulation, heat resistance and hardness/strength of the carburetor. The air passage starts out anodized then transitions into a smooth polished finished for optimal power and smooth consistent power. The lightweight hardware is also anodized. Another huge benefit is the splash guard. It keeps the engine operating smooth under bumpy riding. Making them an AMAZING value overall!

Key Features:

High Compression Forged piston Kit w/ Wrist Pin, Ring Set, Cir-clips
Safe with 91+ octane Pump Fuel
TBparts 63mm aluminum cylinder with HD cast in steel sleeve
63mm Top End gasket kit
Performance high lift cam, complete with new bearings
Nibbi PE24 Carburetor
TBparts CNC Billet Intake Kit port matched to the stock cylinder head
Extended Throttle Cable for use with the stock bars and throttle or tall bars.
Not for use with stock air box – High Flow Race use!
Jets installed #105/#40 Includes Main Jet #108 #102 #100 Pilot Jet #35

Compression ratio on this piston is:

10.9:1 – 170cc bore kit combined with the OEM cylinder head
12:1 – bore kit w/+6 stroker crank 188cc

In both combinations above, high octane pump gas can be used (Race gas is not required).

Note: 2025+ KLX140s – require case boring to fit. Our cylinder skirt is 65.95mm 2025+ cases are only 65.4mm wide.

There are no installation instructions, but if you can replace your piston, you can install this kit. If you don’t have any experience working on your engine, we highly recommend having a professional technician install this kit or, at a minimum, purchasing the shop manual for your bike available from your local Kawasaki dealer. The parts are installed in the same manner as the OEM parts.

Jetting – Base tune Pilot jet #38 , Main Jet #118. Make sure the air fuel screw is 1.5 turns out from bottom before you start tuning.

Installation Notes-

New Choke lever position is much harder to reach compared to OEM, New Fuel Line not included
KLX140 camshaft bolts are reverse threaded, turn them right/clockwise to loosen/remove. Torque to 87 INCH-LBS & Use red thread lock