Compatible with all ANIMA 4-Valve, 4-speed engines
(150F/160F/190F/190S/212)
 
Designed for Circuit Racing. Launch out of corners faster than ever.
 
Shift through the gears while staying in the ideal power band—perfect for serious track riders chasing better lap times.
 
Engineered to keep the engine in the optimal power band (8,500–10,000 rpm).
Final ratio is the same as the original 4-speed transmission.
 
Compatible only with 4-speed engines. Not suitable for 5-speed engines due to crankcase width differences.

For riders seeking higher top speed, we recommend pairing with
PN#81399 : OVERDRIVE PRIMARY GEAR KIT (65-19T)
 
Gear Ratios
#81388 vs (Original)
1st ---15/32 (13/34)
2nd---19/28 (15/26)
3rd ---21/25 (20/26)
4th ---23/24 (23/24)