We're having some savage weather down here presently so might be a few days off with the vide still, you'll just have to take my word for it in the meantime.
Gwhy, cheers for the watts metre info. I'll have to look into something a bit more serious sooner than later.
On the liquid cooling, which is partly why I went for an MX trans, is the two stroke crankshaft housing. How I'll cool the motor will have nothing to do with the original cooling set up at all, none of it remains. The motor is fixed into the crankshaft housing and sealed off from the gearbox and its oil, just the motor shaft pokes through to the box driving what was the clutch gear. The crank housing is about 100mm in inside dia and the motor is about 80mm in dial, so the Astros sits where the crankshaft used to like. Right, so that leaves us with around 10mm of space between the Astros and the housing, this is the cooling jacket.
The original barrel mount opening along with the magneto opening will have to be capped off ( the magneto opening as viewed from the left side of the bike shows the Astros motor with its wires sticking out) once this is done it's a case of running an inlet and outlet at each end of the motor via a pump and some sort of small radiator.
I must say Matt that judging by my bike in its fledgling stages, your set up running two of these motors and higher performance ones at that will be some utter serious dirt bike beater to say the very least. I reckon the bulk of the 3kwr nan tech's job will be counterweight trying to keep the front down!! I was thinking you could gear it up, fit a motard wheel set and proper waste some big buck road bikes through the mountains.
My set up with just one of these motors is honestly almost eye watering in acceleration from say 10 to 80ish kph. I'm struggling to understand how out can to be honest! I never expected it to come anywhere near close to my beloved RMZ450 in performance or be in the same room as a hi po MXer, truthfully it would SMOKE the RMZ's ass in the 10k to 80k run............. easily. Won't do it for too long batteries wise but it'll do it. Without going on and on I've been into and indeed owned a fair number of quick bikes, dirt and street, and this thing is utterly blistering. Still doesn't compute though.
Gears, yes now I get why many people wouldn't bother but it is handy for certain things. 1st is only good for uber slow work and very steep hills, 3rd/4th for general riding which is what I use most of the time then straight into 6th. So indeed a wide ratio 3 speed would be perfect but I think I'll just put up with shifting through the ones I don't need.
I'd put some thought into a servo or solenoid shift set up as gear shifting is a little kooky and will put that into action when I get to it. If performance dirt riding's your thing then an Astros powered downhill is a fine place to start.
