Ok, a bit of an update...
Messed around with the points a bit, ran ok for a mile or 4 then the thing started misfiring badly so limped home and had another look. Swarfy suggested that the points spring might be kissing the cam ring causing the misfire, which reminded me that I'd modded the points last year to give the spring a little more clearance. So checked this, took the points out and replaced them after checking that the fixed end was right at the end of my modded (elongated) slot. Bike ran well yesterday, no faster but no misfire. Today, bloody misfiring badly again after travelling about 4 miles. So I stopped on the side of the road and stripped the points out again, checked the spring position etc, put it back together, no start, not even a cough!!!
An hour lateran several attempts at setting up, Im about to call the AA and think to just check that the little figure 8 plastic insulator was still in place... nope, it had dropped out without me noticing and was lying just by the crankcase breather hole. Retrieved, rebuilt, limped hone on 1 1/2 cylinders.
Dropped the whole points assembly out as I'd noticed some movement in the pivot pin that the points heel moves on. Took the assembly to bits put the back plate in a vice and tapped some centre punch marks into the rear of the pin, tightened it up nicely. Been fir the best 70 mile ride I've had since owning the bike, pulls so much more strongly, overtaking cars up a very steep hill, only got it to 70ish mph but I think if Id had a decent road to play on and a couple of bravery pills it would've got to 80+.
Got home and checked the plugs which were both quite sooty so I'll have a mess with the jetting next I think.
So need a new set of points before these give up again.
These are what's fitted, anyone know who stocks them? I've tried Priory Mags web page and ebay but no luck.
Thanks to everyone for the help and suggestions
Jase
