Arrived!    Tell the Motorized bike world!

CVT Transmission for Harbor Freight 4 Stroke 79cc PREDATOR Engine! 

 Single speed transmissions for bicycles are now obsolete History!   

NOTE:  See list below of additional parts needed to install the engine and transmission. 

We have modified a CVT transmission to fit Harbor Freight's 79cc 4 cycle engines with 5/8" diameter PTO shaft that fits on a 26" Cruiser Bicycle enabling Chain line up with the rear wheel sprocket.  This is called a Zipper fit in Oklahoma! 

Transmission Dive Latch speed is 2000 to 2200 engine RPM.   

Advantage of a CVT Tranny over direct T-Belt solid drive transmissions is Constant Variable Torque based on engine RPM. 

Low engine rpm allows high torque pulley ratio, as engine speed increases the engine shaft drive CC pulley diameter gets bigger and the driven pulley gets smaller, thus the final drive ratio allows faster bike speeds based on engine rpm yet gives low speed torque for better hill climbing.  Yep! The best of both worlds!

NOTE:  We do not advocate high speed motorized bikes so don't ask how fast a bike will go with our CVT transmission.    The fastest speed will be determined by variable issues like; 10T or 12T drive sprocket, the wt. of rider, wheel size, road terrain, wheel sprocket T size, engine modified to remove 3600 rpm governor = a lot of different variables.   

NOTE: 3/4" shaft PTO CVT's do not fit 5/8" shaft engines. Plus, they don't allow a drive sprocket to line up with the bike's rear wheel sprocket when the engine is mounted center of frame where it belongs.     OORAH! Now those 2 push backs have been fixed!   

INCLUDES Black Plastic belt guard held on by 4 screws. 

Heads up!  Does require the additional installation considerations 1 thru 6 denoted below.

1.   A wide pedal shaft kit to allow pedaling. -- Not Included, buy separately if you want to pedal. 

2.  If you want to pedal your bike with engine off you will need to purchase and install a special drive shaft with a 12T Freewheel sprocket.   Not Included, Order Separately Here-in.   Note:  We will soon have a 16T and a 18T freewheel 1/8 x1/2 chain drive sprocket available.  

3.   Slide mount slotted engine mounting bracket. ---- Not Included, buy separately here-in or make your own.  

4.   Gas tank, shut off and fuel line. ------   Not included, buy separately here-in.

5.   Handlebar twist throttle. --------------- Not Included, buy separately here-in.

6.   Muffler and header pipe --------------Not included, buy separately here-in. 

7.  Bike rear wheel drive sprocket and attach parts. 

8.  If you ever want to pedal your bike with engine off suggest you order the optional 12T Freewheel chain sprocket and jackshaft to fit along with your CVT.  Also allows coasting down hill without any restriction.  > NOT INCLUDED: ORDER SEPERATELY. 

9.  Service parts are available for customer support.