Alright I started this thread as a way to keep all my ideas in an accessible place as well as allowing others to input their suggestions.
My working platform is a 72 Xs650 engine of unknown internals.
All I know about this engine is it was a spare for a speedway sidecar, it had an oil cooler between the heads oil feed line and it is known as a "306" to Xs gurus.
From what I understand I have the sort after "hot" 256 cam shaft. With the longer 256 rods.
I had planned to fit a 750 kit to this motor, but most are made for the 447 engine.
This left me looking at getting 447 rods fitted to the 256 crank and the crank and cam rephased to 277 by Hugh from HHB.
I have also found that the sump filter and stock charging system are major issues with these engine, so I had planned to fit a PMA kit and the sump filter mod on offer from Heiden tuning.
Just a few ideas so far. Feel free to pitch in.
My working platform is a 72 Xs650 engine of unknown internals.
All I know about this engine is it was a spare for a speedway sidecar, it had an oil cooler between the heads oil feed line and it is known as a "306" to Xs gurus.
From what I understand I have the sort after "hot" 256 cam shaft. With the longer 256 rods.
I had planned to fit a 750 kit to this motor, but most are made for the 447 engine.
This left me looking at getting 447 rods fitted to the 256 crank and the crank and cam rephased to 277 by Hugh from HHB.
I have also found that the sump filter and stock charging system are major issues with these engine, so I had planned to fit a PMA kit and the sump filter mod on offer from Heiden tuning.
Just a few ideas so far. Feel free to pitch in.