Diesel Dave wrote:Ian, bad luck indeed.
I have an Ultima box in the Tiger, they are available in 5 & 6 speed with either direct or overdrive top gear - gives you lots of options.
If cash is tight remember the 4 speed Enfield box could handle the 700 Interceptor's torque output and you can fit a cush drive clutch to soften the blows.
The way I see it, there's no difference between a 400 single and an 800 twin, unless perhaps the twin is slightly easier as it doesn't allow the crank to slow down too much before the next pulse.
Hi Dave, A 6 speed genuine overdrive, nice, beats the pants off my wide ratio. That should save some funds on a long journey. Funds are always tight, I'm a tight arse.
I bought a Norton AMC box but I wasn't impressed, it's back on ebay.
I do have a 5 speed Harley box (1340) but it's the wrong type, as it has the alloy molded brackets front and back which makes it way too long. I'm just waiting to find another box or case that bolts from underneath (brake out the welder again, Doh) and that's me sorted (fat chance).
I did try to find out what torque the Interceptor kicked out and at what revs but with no joy. My 954cc engine produces 50nm@2400rpm (max 4000+) no that it matters as I'm determined to change the box anyway. The clutch is belt driven so the shock should be down to a minimum.