49cc Shifter vs 79cc Direct Drive?

[FurryOnTheInside]

L

For now just direct drive. I found a supplier of beach cruisers cheap. No gears, so no reason for a jackshaft. If I want, when I have the cash, I could add a shifting internal hub with the jackshaft kit. I would still rather have a freespooling pedal crank assy (sprocket on both sides) that I could hook the chain to directly from trans, to transfer from left to right side of bike without a jackshaft. I found some guys who made a prototype, but I don't think they ever went into production. Can't find the video now.

I think those are in use on some tandems to allow the stoker (rear) rider to stop pedalling. This is like the way the shift kit works to allow pedal start but uses the crank shaft as the JS by somehow having a rotating crank shaft but keeping the rank arms tied together.. On tandems it might as well be on the same side like the SBP and I think most of them are but could be cool for a MB with pedal start.
Fully independent pedalling where either tandem rider can stop pedalling at any time is also possible with a lefty freewheel on the JS between the riders' cranksets (between motor and pedals in MBs) but is not popular on tandems yet. I'm sure these will be commonplace on tandems in the future because they make sense. I forget which company makes it. . . but it shouldn't be a big step to apply it to the JS on a MB.

 

[Deleted member 26224]

SBP shifters are ghey. Go with the direct drive!

 

[Frankfort MB's]

SBP shifters are ghey. Go with the direct drive!

Depends on what your doing. If you have a lot of hills and a bunch of straights then it would benefit you to use a jack shaft

 

[FurryOnTheInside]

Or if you want to carry cargo and be able to get up hills but still use the momentum you get by powering down hill or building up a decent speed on the flat straights too.

 

[CrazyDan]

I would love to have a shift kit. One of these days I will build one. Never seen a 79cc motor, they are usually 66cc. However in most states anything over 48cc is ILLEGAL, and if you ride an illegal bike, you are contributing to the problems all MB riders have to put up with.

Lol in California shift kits are illegal as well. Law requires it be single speed.

 

[Chris Duke]

Lol in California shift kits are illegal as well. Law requires it be single speed.

In the land of EVERYTHING I WANT TO DO IS ILLEGAL!!! Haaaa!!!
Tax the air, tax the water, tax the gas to build the roads, then tax em again with tickets & toll roads!

(and if you ride an illegal bike, you are contributing to the problems all MB riders have to put up with.)
Consent to be subjects of public servants instead of standing up as Americans is the problem. Not people who take part in a harmless activity with no injured party. It all boils down to consent. Back when, gov was the servant, with only the power to protect rights, not violate them, and now they are the master. By the consent of the governed.

In the words of Abraham Lincoln:
No man is good enough to govern another man without the other's consent.

 

[JunkyardDog]

Almost nothing is legal in CA. Many of the things I own and do are illegal in CA. AZ has vehicle emissions testing only in 2 counties. I happen to live in one of them. I have 3 cars, and all 3 are registered in a non emissions county. I get a great sense of satisfaction from beating the EPA. I have been a car enthusiast all my life, and have had nothing but trouble with the EPA. Time to get even. But, nobody notices that. When somebody sees someone riding irresponsibility/recklessly on a motorized bike, they notice. If you get stopped by a cop, he knows how to tell if you have an illegal engine. And while the government does not have the Constitutional right to do a lot of things, they do them anyway. Look at what CA has done to the 2nd amendment. They can do away with the right to ride motorized bicycles as well. Not legally, but they can do it. Then they could impose heavy fines and even jail time for anyone caught riding one. It's a no win situation. Best thing to do is get out of CA

 

[CrazyDan]

Yeah I'm sick of how much gov wants to control my life, when I hurt nobody... I don't agree with my public servants treating me as a criminal each time they interact with me, with no suspicion of a crime occuring. In the words of Thomas Jefferson: a man that chooses security over freedom deserves neither.