I have an AC 650 V2, IE BF 650. Do they make a block heater for this as mine starts so tough when cold? Any help would be appreciated. Thanks Guys.

 

Give a full choke and NO throttle at all when starting in cold weather. Still problem? Try new plugs. Mine starts just fine in freezing 10~20 F degrees.

 

You may want to check the valves for clearence.

 

Ok, egg on my face a little here. I tore down my carbs and did another complete cleaning. I checked the choke lever on the handlebar and it was letting the choke cable slip through, I replaced the $8 piece and my machine starts EVERY time, no matter how cold. This was my only Gripe on my AC and it is now resolved. I went on a nice 20 mile Powerline ride and never had a problem. Thanks for all the input on this guys, if the piece breaks again, a quick fix is not to replace the cheap plastic piece, you just steal a metal shifte lever off of a old 10 speed and use that, the cable ends are the same.