Hello fellow SP1 owners. I have recently purchased my 2001 model after it had been stood for approximately 3 years. Last week I rode the bike and it was lumpy but ran fine once the fresh petrol had flushed through. Yesterday the bike started fine and revs fine in neutral but once in gear and under load it feels like it's dropping onto one cylinder, the bike occasionally ran back onto two at over 5k revs but when back on 1 cylinder it's occasionally backfiring. I don't know which cylinder is dropping out as I'm riding it. I'm thinking plugs/ plug caps/ coils/ HT leads or possibly a injector. Any help/ suggestions would be greatly appreciated as this has tainted my experiences so far with my dream bike. Thank you.