I believe so too, and in part because it's much easier to run a gutsy final drive. If push bike gear could handle a regular 5-10kw flogging then I mightn't have bothered.
The gearbox is certainly on the over kill side of the scale but, as I've mentioned, this project needs to be able to be added to and modified further down the track(so to speak). If it ends up more dirt bike than downhill that'll be ok, ridden on dirt bike trails of course.
My point is that I just want to build a high performance electric downhill and maybe 9kw peak power will be enough, maybe not, I don't know I haven't ridden one before, there virtually is no such thing to test ride. In my mind using this small bore trans allows further mods without breaking etc etc
Got myself another tig welder the other day, coincidently it's utterly identical to my old Lincoln 250 which mysteriously shat itself, for $200 which is nearly a bargain. So now I have spares, awesome.
Anyway pulled off some a-class super shit welds using thoriated electrodes and some un identified filler rods from the bowels of my shed just to have a crack. Which is what they did. Some 5183 filler rods and zirconiated 3.2mm electrodes are on the way which is what's needed for the 6061 and 7005 combo, not to mention practice practice practice. I have some help I can call on if I get scared.
The likelihood of needing to lengthen the swing arm is a real one so the other day I sacked my dense idea of using the standard swing arm spar and replaced the whole lower spar with a shaped solid piece of 6061 on the sprocket side. This will be made as light as possible but will still be heavier than what was there before. Being able to take higher tension loads and far easier fixing of shaft brackets made this an obvious move....for the time being!
Finally got the chain tensioners sorted out and brackets made.
Thanks for the response mate and I really need to post some more pics