TB Race Head V2 Kit – Honda Style Imports
TBparts Honda Style Race Head V2 Kit. For use with the 14mm wrist pin Chinese 54x54mm bore/stroke 125cc engines.
With a little custom work this kit allows a Lifan 125cc engine to use our V2 Roller Rocker head. The V2 cylinder head’s larger stainless steel (21-4N) valves, better porting, larger more aggressive roller cam, and forged aluminum roller rocker arms allow the engine to rev quicker, farther, and make much more power than the stock cylinder head. This cylinder head adds a professional level of performance at an affordable price for the privateer rider. These are high quality parts – clearance your piston intake valve relief an extra 2mm and you can bolt on 30-40% more power! There are no installation instructions, but if you can replace your piston and are handy and careful with a Dremel like tool 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.
- Race Head V2 (valve, seals, and springs installed) covers and hardware included!
- 28.5mm intake valve & 23.5mm exhaust valve
- Forged aluminum roller rockers
- Race Camshaft
- 26mm intake port, 23mm exhaust port
- We stock all the replacement parts for this kit, no ridiculous wait times or prices for these High Performance spares.
- 2mm of piston to valve clearance must be made on the intake relief side to ensure this kit will fit.
Note: This is only for use with 14mm wrist pin Chinese 125cc 54x54mm engine. 2mm of piston to valve clearance must be made on the intake relief side to ensure this kit will fit.
Installation Note: Do not use the original o-rings between the head and cylinder (not needed) but do use the large o-ring at the bottom of the cylinder between the cylinder and the engine case at the oil return. V2 head notes https://www.tbparts.com/wp-content/uploads/2022/03/V2-Cylinder-Head-Notes-Honda-PDF.pdf
Kit Contents by Part Number: TBW0751, TBW0821, TBW0752, TBW1441, TBW0861, TBW0862