Vader
I think this motor has lots of good midrange pull, especially if ran with a 40.5 mm carb on it. the compression is not to high and it kicks over real easy.
The biggest hurdle I see is cooling, IMO you need a fan to cool the radiator.
Thats not to hard to do except for the stator/cdi with alighting coil. the factory 250r cdi will be prone to kickbacks, the cr250 cdi would work great except for no lighting coil unless you try the higher wattage service honda system.
Vortex use to make a 250r cdi that would allow the use of the factory stator/flywheel you could check to see if they are still available. The larger stock flywheel would also smooth out the hit of the motor.
You might be able to run a MSD programmable box off the same lighting coil since they run off 12v
MSD also use to make the old Enhancer boxes that still allowed the stock lighting coil to be kept but
did require a battery to be carried, they were 7.2v and with the new RC batteries you should have no problem going
12-16 hours of engine run time the old small msd battery went all weekend back in the day which was probably 5-6 hours run time.
I would have to double check the timing at kicking rpm on the enhancer to make sure it does not have to much ignadvance while kicking
I have a enhancer that has never been mounted that I might sell
