I've read ton of threads similar but thought I'd throw this out there and see what ya'll think. I bought a 2007 RS 1700 late Dec. It has 17k miles on it but clearly sat for a while. (Air box was dirty, battery was dead, took while to crank up, backfired few times first 5 minutes I rode it) Since then it's been fine albeit it's cold in NC so I really have only ridden it a few times. But 3 times now I've had an impossible time getting it to crank. The motor turns over, fires up but sputters and chugs and very low idle for 20-30 seconds and then shuts off. Repeat 15 times until I get lucky and fires up nice and steady. No other problems. Once it's running it runs beautiful. (Full choke makes problem worse...in fact, I pretty much can't even use full choke. Most success comes from barely pulling choke out at all & then turning choke off after 30 seconds or so).
I have aftermarket straight pipes (no baffles) K&N air box (just cleaned) & new battery. Mechanic buddy suspects it was jetted already bc it would ride terrible otherwise.
Any suggestions / ideas would be awesome. So far I've been told to replace spark plugs & turn idle up a bit...which I will do tomorrow.