Any motorcycle builders out there? Need advice on transmission

[9kredline]

I was asked by a friend to do some work on his bike. He's wanting to mount a longitudinal motor into his v-twin frame for a shop as advertising. The motor is a briggs vanguard 3 cyclinder, which is very compact, but I dont know where to begin with the transmission. Do any longitudinal 4 cylinder motorcycles have a shaft to chain transmission that isn't integrated into the block that I could adapt? Or any other options? This isn't my strong suit but I'm eager to help him and learn in the process.

 

Thanks guys!

[Mul-ti-pass]

The only thing that comes to mind is BMW. I know some of their transmissions were separate from the motors. The only problem is, I think they were all shaft drive, not chain. I'll bet a chain conversion would be possible though.

I'm actually in a similar predicament with a bike I'm building. I'm using a right angle gearbox from Tandler, and from that a HD type Primary belt drive with a Baker Torquebox RSD transmission. Although right now I'm having a lot of trouble getting info on what belt drive I should use. You could use my method, but there is quite a bit of machine work involved, and quite a few parts vendors with no customer service.

Good luck with the project.

[mom'sZ]

older Harleys had a separate transmission. Some were belt and some were chain.

[9kredline]

There's an avenue I can pursue! I'll give the Harley and BMWs a look and see if I can come up with anything. It's not looking good, though. I may be a bit out of my league.