hi guys I,m back after a bit of an absence , not absinth ! had to do my test again due to the dvla having lost some of my licence details , ah well , all done and 600 spondulies lighter.
any how , my old yam pre divvy xj600 1989 , is playing up , and I,m great at pulling things to bits and stickin em back together but when it comes to intermitant stuff ??????
so can you please help......bike fires up great , 1st time every time I get her out , she rattles a bit from the clutch but basically runs great. pulls like a train and no smoke. shes done 30000 mile but ive restored her to a certain extent. now , heres the difficult bit...if I do roughly 15 mile or so or slightly less if ridden hard she starts miss firing and then runs on 3 cylinders , 2 cylinders if I try to go further. let it cool down for half an hour and shes back on 4. if I really open her up , 7-8,000 revs it seems to briefly hit on four cylinders again but briefly.
now , I love the old girl , shes ugly but great fun ....we all know one of them eh ? I just want her running right again , surely cant be much , I was thinking coil , electronic ign box ? any ideas lads I,m desperate here. how do you test these items if it is them , please can you help . cheers Richie.
ps , I know this is a yam site but any one needs help with a brit bike. I,m availlable