Fits all Lifan
50-120cc with 17mm shaft + 140cc engines with 17mm shafts plus many older Honda engines like the CT 70 and Z50.
All of Hooper Imports loose engines are shipped with a factory supplied
14 tooth sprocket. By changing this
sprocket with a larger one you will increase top end speed and decrease torque
proportionately.
#420
50cc-120cc + 140cc Engines
|
Number
of teeth
|
Increase
in speed
|
Decrease
in torque
|
|
14
Tooth
|
baseline
|
baseline
|
|
15
Tooth
|
+7.14%
|
-7.14%
|
|
16
Tooth
|
+14.28%
|
-14.28
%
|
|
17
Tooth
|
+21.43%
|
-21.43
%
|
Stock Lifan’s
use a #420 chain for engines between 50 and 110cc plus 140cc.
Their 125cc engine uses a #428 chain and has a different mounting spline
than the other engines. The 120cc engine
uses the #420 chain in most cases and has the same mounting splines as the
50-110cc and 140cc engines. You must purchase the
correct sprocket for your engine type and chain. You may need to add or subtract
length to your chain when changing sprocket sizes.
#428
50cc-120cc + 140cc Engines (These sprockets will allow you to use
a #428 chain)
|
Number
of teeth
|
Increase
in speed
|
Decrease
in torque
|
|
14
Tooth
|
baseline
|
baseline
|
|
15
Tooth
|
+7.14%
|
-7.14%
|
|
16
Tooth
|
+14.28%
|
-14.28
%
|
|
17
Tooth
|
+21.43%
|
-21.43
%
|
