CVT CVT Drive Sprockets....

[spad4me]

49cc polini and the reason for the speed, it going on a tipsy trike.

You are probably going to be able to do burnouts with that engine.

 

[DetonatorTuning]

49cc polini and the reason for the speed, it going on a tipsy trike.

WOWSERS with that engine on a trike you'll be able to do towing for the school district LOL

what rpm do you want the 35mph at ?

18T output in what chain pitch, not that it matters just interested in what chain you'll use to hook that up.

steve

ps, if you are going striaght to the hub from the approx. 3:1 at the cvt output.....................................

106T = 17.67:1 = 35@ 8000rpm

119T = 24.33 = 35@ 9000rpm

i recommend a jackshaft, even with spacing and secondary alignment issues it'll make things much easier to accomplish. if this is going to be a delta trike you can incorporate a jackshaft right into a rack mount frame over the rear axle.

 

[loquin]

Do you need (or want) a freewheel between the CVT and the rear hub? It'll let the bike coast with the motor at an idle, but, you won't have engine braking.

You'll need a total of 31.4 reduction between engine and rear hub. apx. 3.2 reduction is provided by the CVT gearbox, so you would need an additional 9.8 between the 18t CVT sprocket and the rear sprocket. A jackshaft is recommended.

If you assume a 58t rear sprocket, and, assume an 18T freewheel at the output of the jackshaft, this is 3.22 of the 9.8 you would need. Since you'll need an additional 3:1 reduction, you'll need a 54t sprocket at the input sprocket of the freewheel.

So:
3.2:1 at CVT output gearbox
18t at CVT to 54t at Jackshaft (3:1)
18t freewheel at Jackshaft to 58t at hub (3.22)

total reduction is 3.2 * 3 * 3.2, or, 30.7

If you can find smaller primary sprockets (I've seen 14t, #35 chain CVT sprockets and 16T freewheels) you can make the secondary sprockets smaller by the same ratio...

 

[stude13]

ok, now i think i can get it done. much appreciated.