by pkay » Mon Jun 23, 2014 1:41 pm
I'd probably start by tuning it back to stock settings and going from there. Problem being is that you can chase your tail with an old bike and unless you start from a sound basis you shit yourself to tears. I generally try to get the tune settings - timing, carb settings, balance and stuff per the book then go from there. Correct plugs and so on. How stock is the bike? eg original air box, no leaks around the air pipes creating a lean condition when hot or leak in the vacum system for the fuel tap (strange one I know but had that as aproblem before). Its a bitch when nothing is obvious but these things are an arvo's work and you'll be able to narrow it down pretty quick. Also on my GPz900 I noticed the fuel gauge doesn't go down slowly but in steps - so don't rule out fuel feed if it only happens occasionally esepcialy at the low end of the tank but the stop then restart doesn't sound right for that. Another one is something I had a problem with on my Z1300 where someone stuck an aftermarket fuel filter in the fuel line that sat behind the block - of course when things got hot I got vapour lock, 5 minutes on the side of the road and off again.
I would have thought dud valves would show up straight away as they did on my FZ750 which would start but had no pull.
Good luck and let us know when you find the problem
PK
"Too many bikes is never enough"
ZXR750H1,GPX750R,GPz600R,750,900R,1000RX,KR250,Z1a,Mach3,Z1300 and..