Starting Problem when bike is Hot

[Rifleman3006]

My 650 starts easily when the engine is cold but every so often it is very hard starting after I get off the bike and run into a store and come back in 5 or 10 minutes. I can shut off the bike and it will start right back up no problem but if I'm off of it for a longer time ( 5 or 10 minutes) it's hard to start. Any thoughts on what might be causing this?? Thanks!

 

[wsteele]

I would try some addictive to yor fuel I have had that happen to me on a very hot day of riding and stopping the bike for awhile and the bike got baked in the sun for awhile before I got back on it. I am not a Startron salesman but it is really good stuff and will probably help you out with your problem.

 

[JaimeC]

When was the last time you had the scooter in for service? Might be just a software-flash away from being fixed.

 

[Stonebrook]

I have had this happen 3 or 4 times. It happens when I take a short ride, a mile or 2, and going into a store for few minutes. When I get back on, it doesn't want to start. I suspect the engine is fooled into thinking it is warmed up, and does not increase the fuel/air mix as it would if it were cold.

The fix for me is to give it a little throttle when cranking. Starts right up. And remember, a little throttle with a firm hand on the rear brake!

 

[Snowdog]

Does it turn over just as fast, or does it sound like a low battery. If so you might need to clean your battery terminals. If it still turns over good, then I agree you might be fooling the FI into a wrong mixture.

 

[tlippy]

Stone...Your suggestion works. I suspect the choke doesn't come on again after a short run.

 

[Rifleman3006]

Thanks everyone. It does crank just as fast as any other time, the battery is fairly new as I had to replace the original that was bad. The bike has 4300 miles on it, has not been in for any service other than 600 mile first service, then a water pump replacement at 2100 miles and a new battery shortly thereafter. I changed the oil myself at 3600 miles. Anyway, I may try some Startron as suggested and also try to give it a little throttle when starting. It doesn't do this all the time, sometimes it starts right up after I come out from a store etc. Other times, I don't think it wants to start so go figure, it is not consistent!!