What voltage have you got at the battery?A good battery is critical on these bikes.You need at least 12.5v at the terminals for reliable starting.Dont go by the voltmeter in the clocks either,...its not reliable. The backfiring could be a leaking exhaust.My old 999 did that when the exhaust seals failed.It could also be down to unburnt fuel. I'm thinking the latter. Early 999/749's used to eat coils,...especially the front cylinder.Moisture from wet roads or a damp garage can creep in and cause corrosion.2005 onwards bikes had an improved version that is a straight swap.(The coils are built into the spark plug caps,btw.) So, 1.Fresh fuel. 2.Check battery. 3.Check/clean plug caps. Let us know how you get on.
I don't like the idea of leaving old fuel in the tank over winter... Especially if the bike could be left in cold conditions.. Condensation can form in the tank and water can get into the fuel… Tank can rust fuel filter can bung up… My bike is always indoors over winter.
I recall reading that to preserve tanks its best to put them away full to the brim ,no room for condensation and no bare metal to corrode. I dont think fuel goes off like it once did? (but don't quote me on that)
I recall reading that to preserve tanks its best to put them away full to the brim ,no room for condensation and no bare metal to corrode. I dont think fuel goes off like it once did? (but don't quote me on that)
pete
Yep, that's what I believe. I work on aircraft and we always put them to bed with tanks brimmed if its for an extended period. The best way to stop the condensation is to completely fill the tanks.