SBP 4 Stroke Shift Kit Grubee Gearbox

This kit is sweeeeeet! Makes the 4 stroke ride even better...higher speeds with less revs.and fun!Sick Bike Parts are great people to do biz with.You recieve quick answers to any questions you might have during your build.My build was easy and fun using this well thought out kit and mounting system.Take alook for your self

Thanx Motomagz

 

[professor]

Those guys are really sharp - great design.

 

[Skyliner70cc]

Is this the gearbox that has the terrible noisey gear whine? Anybody know if this shiftkit can be used for other 4 strokes?

Thanks, been looking for a 4 stroke shift kit for a while but not sure if this will work if it require using a noisey gearbox.

 

[Fabian]

That SBP 4 stroke shift kit is a very professional looking design.

If having a physically large engine in a pushbike isn't a problem with attracting attention from the police, it will prove to be a much better option from a reliability standpoint than the 2-stroke engine most of us are using now.

Fabian

 

[MotoMagz]

Is this the gearbox that has the terrible noisey gear whine? Anybody know if this shiftkit can be used for other 4 strokes?

Thanks, been looking for a 4 stroke shift kit for a while but not sure if this will work if it require using a noisey gearbox.

I believe the kit will work with the hoot gearbox also..check in the vender area to be sure.As for whining I have none.My gearbox is a stage II.. quit and still running strong for over 3 years with all it original parts.

thanx MotoMagz

 

[Skyliner70cc]

MotoMagz,
Where doesn't one buy a stage II? I've wanted a 4 stroke for so long but everything I read about the 4 stroke gearboxes were that they made a terrible whining noise.

Thanks,
PS Anybody know if Hoot gearbox is good or not? Is Stage II gearbox a replacement for Hoot or vice versa?

 

[ocscully]

The stage II is/was the first improvement on the Orig. Grubee gearbox, and of all the Grubee gearboxes seems to be the quietest. Like Keith I was/am one of the testers and built using the Honda GXH50 motor with the Grubee III gearbox, mounted in a Schwinn Skyliner, and YES it is Noisey but getting a bit quieter as the miles build up. But I don't think it will ever be as quiet as the Stage II gearbox bike I sold to a friend last year.

As for alternative gearboxes. The new DAX Duplex Chain Drive reduction box might be something to consider. Or perhaps the new Staton 5:1 Reduction box with inside drive. Both of these boxes are direct bolt up to the smaller 4-stroke motors that use the 76mm clutch (35cc Robin/Subaru, Honda GX35) and probably could be adapted to the current SBP 4-stroke Shift Kit.

ocscully

 

[Stoney]

You can use the staton (18.75 gearbox) that is what zombie builder uses on his builds as well as others with the stretch frames

 

[Skyliner70cc]

Thanks! As much as I'm impressed with the 4 stroke shift kit, I will have to wait patiently until SBP doesn't their magic on better/alternative 4 stroke kits.

 

[MarksA-C]

I wonder if that would work with the G4 belt kit. That would be an awesome combo!