hard start on bf650i

[06bf650i]

i have been having a hard time starting when i let my bike sit overnight or over 4 hours. after i finally get it to start and run it for few minutes, it will crank on the first turnover. i have put new jets in when i put hmf on. but i was wondering if it could be the valves. engine runs great after you finally get it goin.

[TonyBlonie]

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i have been having a hard time starting when i let my bike sit overnight or over 4 hours. after i finally get it to start and run it for few minutes, it will crank on the first turnover. i have put new jets in when i put hmf on. but i was wondering if it could be the valves. engine runs great after you finally get it goin.[/b]

My valves were too tight and caused hard starting at 1000 miles. It never hurts to check and adjust them.
I also have a weak fuel pump which is vacume operated on the 2006 650i. Try turning the fuel selector to prime next time before you start cranking. It gives a little more fuel pressure to the carbs.
These two things turned my almost impossible-to-start bike into a dependable ride.