I'd appreciate some advice please... Now that I've got the UJM run in I thought I'd take the SP3 out for a ride this evening. It turned over fine, eventually started, but sounded like it was only running on both cylinders some of the time. It kept dying, spat back through the airbox a few times, popped through the exhaust. Eventually I went up the road, it died on me several times. Generally, it's not a happy bike.
Assuming it's not just sulking about being neglected and the company it has to keep in the garage, any thoughts? Obvious things - there's plenty of fuel in it, the battery has been on an Optimate.
TIA
Andrew