DK
there are loads of info here on xs400 cafe racers as well as pictures. have a look around the forum and please ask about specific things and we'll do our best to answer.
drewps
I think there was a specific master cylinder for this bike with extra angled mount to level the cylinder. sounds like there is air in the system for the lever to pull back like that.
if the xs650 has similar bars and is single disk, then you should be ok with that.
drewps
jay
why are you worried about an overflow pipe. the issue here is you have a fuel leak and its usually down to float valve wear or crap in the fuel preventing a seal!
either wy you MAY get away with tapping the carb body to seat the valve, failing that you need to strip the carbs down and replace the valves. Get the kits from
when donw ensure you have fitted an inline fuel filter, those are easier to change than stripping carbs!
drewps
i'd look at the battery as these have a short life. you may get 12v but its the amps you need.
best way to check its taking a charge, is to rev the bike at 3k and put a multimeter on the battery terminals. you should be getting 13 to 14 half volts!! other than that there is a charging issue or the battery is kaputt!
to the forum
you don't say in your profile where you are from!!
USA speedsport ( yamahatopdog), bike barn, partsnmore, motogrid
europe cmnsl, granby's, motoward, fowlers
and of course ebay
drewps