Jackshaft Better than Jackshafting?

[KCvale]

for general rideability and longevity nothing beats a shift kit, but bicycle gears are clunky and inefficient. a CVT would be more ideal on the racetrack.

I like an internal 3-speed hub.

 

[Ronen]

for the same amount of trouble you can have a bike that goes 48mph maximum and yet still take off good from a start.
That is possible by utilizing my recommendations for these engines. I know because my 55cc Grubee did that.
Shift kits add complexity and rob 8 % of engine power. The people that race these engines don't use shift kits.

Did you use Centrifugal clutch or regular? is there a way to start from zero with regular clutch (i have 80cc 2 stroke chinese) or make an upgrade besides cent?

 

[KCvale]

Did you use Centrifugal clutch or regular?
is there a way to start from zero with regular clutch (i have 80cc 2 stroke chinese) or make an upgrade besides cent?

(sigh) I told you this in your other topic about' not wanting to pedal'.
Your 2-stroke engine has no way to start it on the engine.
If you want to use a centrifugal clutch so it will stand still at idle and go when you give it gas, you need another way to start it.

 

[Ronen]

(sigh) I told you this in your other topic about' not wanting to pedal'.
Your 2-stroke engine has no way to start it on the engine.
If you want to use a centrifugal clutch so it will stand still at idle and go when you give it gas, you need another way to start it.

Yes but the most ipmortant to me is to be able start from zero after its running and to not pedal every time I stop.
why Its impossible to slowly give gas and in the same time release the clutch like in motorcycle?
Is there regular clutch I can put that will not get destroyed when doing this?

 

[Nanonevol]

(sigh) I told you this in your other topic about' not wanting to pedal'.
Your 2-stroke engine has no way to start it on the engine.

Relax Dude, that's not me - I only have to hear it once.

 

[Nanonevol]

But you have a 2-stroke with an internal gear reduction and manual clutch.
You can just mount two different size sprockets on the back wheel and make a derailleur to change between the two.

Are you suggesting doing this on the left side of the wheel? Interesting. I wonder if a derailleur could be reversed like that. But I like internal gears too. Any way to put that on the left side??

 

[KCvale]

Yes but the most important to me is to be able start from zero after its running and to not pedal every time I stop.
why Its impossible to slowly give gas and in the same time release the clutch like in motorcycle?
Is there regular clutch I can put that will not get destroyed when doing this?

You can, it is called 'feathering' the clutch.
You give it near full throttle and let the clutch out gradually.

Depending how small your rear sprocket is (for speed) it may take awhile until you are moving fast enough for your engine to stay above stall speed.

That is the bane of wanting to go real fast with a fixed gear ratio, you loose your low end 'get going' power.
To do it, you have to slip the crutch which eats up the clutch pads.

Nano, sorry bud, my mistake, it just sounded so familiar I made the cardinal mistake of assuming he was the same guy.
As you know now, you just can't have it all with a stock 2-stroke.

 

[KCvale]

Are you suggesting doing this on the left side of the wheel?
Interesting. I wonder if a derailleur could be reversed like that.

No, you would have to make something 'mirrored' to that, and it would have to be real close step, a couple teeth or so, so it could climb back uo to the bigger sprocket.

But I like internal gears too. Any way to put that on the left side??

Again, just design a mirror mechanical design and you are set as nothing for a bicycle is designed for left side operation, hence why we have jackshaft systems to just put the drive on the right side.

 

[HeadSmess]

snif sniff. woe is me. i bought a bicycle with an engine. sniff. i thought it was like a motorbike and it didnt need to be pedalled, ever.

oh woe, oh lament! why didnt i just buy a motorcycle if i didnt want to pedal a BLEEDING BICYCLE!?!?!?

seriously, is it me or is the world getting stupider?


its motor ASSIST, not "COMPLETE AND SOLE SOURCE OF POWER"

 

[butre]

your legs make way more torque than any bicycle engine can. something on the order of 75 ft-lbs average. I don't have to pedal if I don't want to, but it helps a huge amount with off the line acceleration and hill climbing.

if you never want to pedal again, get a 60 tooth sprocket. then again, you could pedal faster than a stock motor with a 60 tooth will take you