Hi there Leo,
I raced Husqvarna 250 crs and later Yamaha mono shock 250.
I was, as always, just a mug having a go but I loved the game and I took so much away that was of benefit...like anything can be done in the time before the next race
As to two strokes laying about...I had a 4 hp Seagull out board in the garage for five years which started first pull without attention to plug...fresh fuel however as I would never leave fuel in a motor that would sit around.
Thank you for your interesting account.
alex