170cc / 63mm Big Bore Kit - All KLX140 JTI CNC Aerospace grade 6061 T-6

CNC Aerospace grade 6061 T-6 billet construction

For torque at low-middle rpm & power at high rpm range

Custom made Mounting brackets for the BAC4000

NOTE: This is the only camshaft we offer that includes tappet adjusters

Add the 6mm larger VM26 carburetor (that utilizes the stock air box) and the bike will not only start up and idle better but it also feeds the engine more air and fuel to make more power through the powerband

170cc / 63mm Big Bore Kit - All KLX140 JTI CNC Aerospace grade 6061 T-6TB Parts 170cc 63mm Big Bore Kit Fitment: Kawasaki KLX140 (2008 2020) Kawasaki KLX140G (2017 2020) Kawasaki KLX140L (2008 2020) Kawasaki KLX140R (2021 Present*) Kawasaki KLX140RF (2021 Present*) Kawasaki KLX140RL (2021 Present*) *Fitment Note: 2025+ KLX140s MAY require case boring to fit. Our cylinder skirt is 65. 95mm and SOME 2025+ cases are only 65. 4mm wide. This kit includes a lightweight high compression piston that is 5mm over stock making