2
210061741
Guest
I think i would like to put one of these on a bike.
These motors are used for alot of things.
The 29cc and the 27cc are compact 3+ HP motors.
There are avaiable full dimensioned drawings for design purposes.
Ok the clutch kicks in at 6000 rpm .....
So obviously it will need geared down quite a bit.
But the little things run to 18000 rpm.
There are also Torque HP curves available too.
They use these on gopeds with a 6T / 7T drive sprocket and a 98T driven sprocket.
98 / 6 = 16.3 : 1 gear ratio.
98 / 7 = 14 : 1 gear ratio.
So lets look at the 14 : 1.
6000 RPM / 14 = 428 RPM at 98 tooth sprocket
15000 RPM / 14 = 1071 RPM at 98 tooth sprocket
18000 RPM / 14 = 1285 RPM at 98 tooth sprocket
Lets compare My current HT Rig.
4.1:1 gear ratio.
1000 take off rpm
4500 max rpm
1000 / 4.1 = 244 rpm at 10T drive
4500 / 4.1 = 1097 rpm at 10T drive
Well now that is interesting but makes sense.
At a 14:1 ratio we would run the same drive speed at 15000 rpm but the starting range speed of 428 rpm whic is way too high.
I would take a quick guess and say the starting speed would be around 15 mph.
Thats alot of peddeling.
The problem is if i reduce the gears higher I will loose the top end speed.
That defeats the purpose.
The honda uses a 3000 rpm clutch which lowers the starting speed alot.
I beleive the CY29 idles at 4000 rpm so thoose 3000 rpm springs wouldnt work.
Now i understand why the CVT comes into play.
It Varies the gear reduction.
I don't think the gen111 gearbox would work out.
And i really don't think i want a CVT.
I had hoped to use a jackshaft instead of a cvt for my gear reduction but that ain't gonna be easy.
Any Ideas????????????
These motors are used for alot of things.
The 29cc and the 27cc are compact 3+ HP motors.
There are avaiable full dimensioned drawings for design purposes.
Ok the clutch kicks in at 6000 rpm .....
So obviously it will need geared down quite a bit.
But the little things run to 18000 rpm.
There are also Torque HP curves available too.
They use these on gopeds with a 6T / 7T drive sprocket and a 98T driven sprocket.
98 / 6 = 16.3 : 1 gear ratio.
98 / 7 = 14 : 1 gear ratio.
So lets look at the 14 : 1.
6000 RPM / 14 = 428 RPM at 98 tooth sprocket
15000 RPM / 14 = 1071 RPM at 98 tooth sprocket
18000 RPM / 14 = 1285 RPM at 98 tooth sprocket
Lets compare My current HT Rig.
4.1:1 gear ratio.
1000 take off rpm
4500 max rpm
1000 / 4.1 = 244 rpm at 10T drive
4500 / 4.1 = 1097 rpm at 10T drive
Well now that is interesting but makes sense.
At a 14:1 ratio we would run the same drive speed at 15000 rpm but the starting range speed of 428 rpm whic is way too high.
I would take a quick guess and say the starting speed would be around 15 mph.
Thats alot of peddeling.
The problem is if i reduce the gears higher I will loose the top end speed.
That defeats the purpose.
The honda uses a 3000 rpm clutch which lowers the starting speed alot.
I beleive the CY29 idles at 4000 rpm so thoose 3000 rpm springs wouldnt work.
Now i understand why the CVT comes into play.
It Varies the gear reduction.
I don't think the gen111 gearbox would work out.
And i really don't think i want a CVT.
I had hoped to use a jackshaft instead of a cvt for my gear reduction but that ain't gonna be easy.
Any Ideas????????????