SBP 4 Stoke Prototype

[Pablo]

......now I run a single speed so this would work just like a standard jackshaft? I would luv to get rid of that freekin tensioner.MotoMagz

Yes. Indeed, that is what we are talking about.

 

[HoughMade]

Honda engines should not be broken in too easy.

Just ride it and don't spend too much time at one rpm (vary the engine speed a lot) and don't over-rev it too often.

 

[Pablo]

Yes, just don't baby it.

 

[Alaskavan]

Dang. Now I'll have to add another project to a list that's already too long.

 

[mabman]

And Jim there is something coming down the pipe that may change your tune, because in fact you can work with the exhaust on a 4 stroke to really change the way it delivers power. It is a different formula than a 2 stroke but still follows the same general principles. It has to do with optimal length and varying diameters in other words.

 

[Pablo]

PS That bb spindle is holmesesque.

It should be banned!!

 

[mabman]

Definitely the drawback to 4 stroke is their width including a drive system as compared to an HT. If anyone had an extra half mil around you could probably solve the problem but in the mean time throw the q factor equations (http://www.recumbents.com/WISIL/qfactor/qfactor.htm) out the window and be gentle pedaling, if you ever do, with that left leg! I know plenty of folks that have bent bb spindles that only stuck out just far enough for the crank to fit on.

 

[cpierce]

Time line

What is the outlook on these kits now? Do you have any update on the time line for these?

 

[Ghost0]

We are still testing. To be honest we have been busy doing some other work related items but will hit it again in earnest next week. I should be able to post some performance figures soon. I would say another 60 to 90 days before we have it on the market.

 

[cpierce]

Thank you, I am looking forward to this and your further improvements to motored biking.