Join Date: Jun 2012
Location: Lisboa, Portugal
Motorcycle: 99 SRAD 750
Re: How to cold start
I allways tought that the choke mechanism would allow more fuel in the same conditions.
I'm not sure why, but from what ccmhunt wrote, if there is an opening from the engine intake to the vaccum chamber, it would create more vaccum, lift the needle higher then letting more fuel in at the same rpm.
To the OP...that on the left handlebar is a fast idle, it's not a choke, altough it is used to help starting in the cold. My FI 750 has that too, and sometimes she is a bitch to start in the cold weather. Try making the pump prime two times, and blip the throttle while pressing start. Still, a bitch to start but helps a bit.
If she is very very hard to start then I would check the valves, throttle sync, and ECU repro if you are using aftermarket filter+exhaust...
Last edited by tmp; 11-06-2012 at 11:04 AM.
Reason: Vaccurized unreason