Best Belt Drive gearbox

Tommy9345

New Member
Joined
May 23, 2019
Messages
2
Hello,

Just joined the forum. New owner of a MB with a 49cc 4stroke kit. Pleasure to be a part of the community

After a weekend of installing and tuning everything, upon the first ride the stock single chain box completely blew up on me.

Im on the hunt for a reasonably priced Belt drive. The 4g looks great but for $150+ Im wondering if there are other more cost effective transmissions floating around.

Any help with the search is appreciated.

Thanks in advance

- Tom
 


CrazyDan

Well-Known Member
Joined
Jul 9, 2016
Messages
2,285
The 4g is the one you will want, any of the cheaper ones will be a knockoff 4g with inferior quality, or the double chain transfer case.
 

Tommy9345

New Member
Joined
May 23, 2019
Messages
2
The 4g is the one you will want, any of the cheaper ones will be a knockoff 4g with inferior quality, or the double chain transfer case.
How is the double chain case? Is it significantly better than the single or not worth it ? I appreciate the help
 

gary55

Well-Known Member
Joined
Nov 27, 2012
Messages
3,895
I'm with Dan. For these engines the 4G belt drive is the way to go. I'm not 100% sure but I think your engine has to be the taper shaft version to accept it.
 

zean

Member
Joined
Dec 5, 2010
Messages
67
The 4G belt drive is adequate. If you wanted to spend double the money of a 4G I'd suggest EZM's Q-Matic. It uses a go kart clutch and you can really feel the difference in the way in locks up compared to a bicycle or weed-eater type clutch. The Q-matic is extremely tough. There was a rich youngster working at my last job. He drove Ducati, large diesel pick-up and BMW sports car, a good worker and a team player, I over heard him say,"...if you want the good sh-t, you have to pay for it."
 

CrazyDan

Well-Known Member
Joined
Jul 9, 2016
Messages
2,285
The 4g can be used with staton-inc's heavy duty clutch, it's a game changer for the tapered shaft engines and comparable to a max-torque or better clutch go-kart clutch IMO. Not many are willing to fork out an extra $50 for a clutch, but this might change minds: I have been using the same hd clutch 2 1/2 years daily driving, and more recently, track racing. Still looks brand new , no dust in the clutch area.
 

zean

Member
Joined
Dec 5, 2010
Messages
67
Quite some time ago I believe David Staton told me that he has never heard of his heavy duty clutch having to be replaced. I had forgotten about that. Thank you.
 

The_Aleman

Well-Known Member
Joined
May 2, 2007
Messages
1,012
The Q-Matic is perhaps the finest flat-land-cruising transmission you can buy, it's so smooth due to it's belt-underdriven clutch. Riding a bike with one on a well-paved street makes you feel like you're on a 2-wheeled locomotive. If you're geared for an easy 30 cruise tho, it's gonna be absolutely lousy on hills.

Staton's transmissions are heavy-duty beasts that will likely outlive your engine, possibly even yourself. Like the Q-Matic, if they need to be serviced, it's easy to do so, many of the parts are available at a hardware store. There's no chinese potmetal in these things, no waiting for the slow boat for parts.

At $150, you can't do better than a 4G. They are in between Q-Matic and a Staton on smoothness, and if you have the tapered-shaft version, they require perhaps the least amount of maintenance of any transmission. Just a light application of dieletric grease on the belt to keep it supple. They have better power transfer over a Q-matic, which makes them superior on hills with same gear ratio. Can be shift-kitted relatively easy if you're into maintenance and big hillclimbing. A Staton-Inc clutch on tapered 4G is def a nice upgrade.
 

Old Busted Hotness

Active Member
Joined
Jul 2, 2018
Messages
316
Another vote for the 4G. It'll haul me and my heavy-ass bike up a 6% grade, cruise at 30mph and has proven to be totally reliable. The dual-chain gearbox is a waste of time. When it's not stretching its chain it's breaking input shafts. Pure garbage.
 
Top