AHP 4 Speed Transmission (1 Down 3 Up) - Z50 / XR50 / CRF50 / XR70 / CRF70 / CT70 / SL70

AHP 4-Speed Transmission Kit

The AHP 4-Speed transmission shift pattern is 1 down, 3 up with hardened gears and shift forks
The kit is made for those of you wanting to upgrade your stock Honda motors from 3-Speed to 4-Speed
It will work with both stock style, semi-auto AND manual clutch kits
(fits into your OEM Honda cases or your import motor with crank mounted clutch)

Recommended for engine builds starting anywhere from 50cc all the way up to 117cc plus

Fits in:
     -Z50
     -XR50
     -CRF50
     -XR70
     -CRF70
     -CT70
     -SL70
     -ATC70
     -TRX70

Kit comes complete (ready to pop in) with:
     -Main shaft and gears
     -Counter shaft and gears
     -15 tooth front large spline Z50 style sprocket
     -Shift drum and hardened shift forks

Arrives assembled for you ready to pull your OEM transmission and pop this in!

Primary reduction ratio: 3.722

Gear Ratios:
     -AHP     -OEM Honda
     1st Gear -3.182     -1st Gear -3.272
     2nd Gear-1.706     -2nd Gear -1.706
     3rd Gear -1.238     -3rd Gear -1.238
     4th Gear -0.917     -4th Gear -You wish, that why you're buying THIS! :)

Quick note: 50 Primary gear count 17/69 or 70 18/67

For reference:
     -Check out the video on YouTube of splitting cases: http://www.youtube.com/watch?v=63skpwY-yTY

Please note:
When using with 6V points ignition CT and Z50 engines you "may" need
OEM HONDA Kick-start shaft gear part # 28211-GEL-A80 and also
OEM HONDA Kick-start shaft part # 28251-GEL-A80

If you have any questions please call one of our knowledgeable and friendly techs at 833-327-8507