only starts with hot-start lever
Posted May 02, 2006 - 10:44 AM
Posted May 02, 2006 - 05:14 PM
Posted May 02, 2006 - 05:42 PM
What exactly does this hot start device do? it may help in the diagnosis?
The hot start is opposite of a choke. Your choke richens your mixture, where as the hot start leans the mixture.
Its kind of really hard to say, cause my bike is really lean to begin with, so if I pull my hot start at idle it will die from starvation. But yours might be richer and you just need to adjust your idle. You ever hear a lawn mower die just as its running out of gas? It will actually increase in rpms for a sec or two because of the lean mixture. Well its just a thought, or you put it back together wrong
Posted May 02, 2006 - 06:23 PM
Posted May 02, 2006 - 06:35 PM
Posted May 02, 2006 - 06:45 PM
Posted May 03, 2006 - 02:04 AM
Posted May 03, 2006 - 02:52 AM
Posted May 03, 2006 - 07:38 AM
The hot start cable is connected to a plunger in the carb. When you pull the lever, the plunger opens up and allows fresh air into the carb to lean out the mixture. It does the exact opposite of a choke.
Thanks for the explination of the hotstart but how does it lean out the carb? what circuit does it affect? and yeah, sounds like you trouble is in the pilot circuit.
AUS_WR450 - Whilst on this subject of hotstart setup and jetting, I have a question. Once my bike is nicely warmed up after about a 5 min ride, if I pull in the hotstart lever and the revs rise. Does this suggest that my pilot circuit is too rich. (the bike has no apparently jetting issues across the rev range).
This could be an indication that the pilot is set too rich. Try turning the fuel screw in a 1/4 turn at a time while it's nice and warmed up and idling and see if the rpms go up. Refer to the sticky at the top of the jetting forum to get the pilot jet and fuel screw tuned up. Having this circuit tuned well will aid in starting (hot or cold) as well as give you better low end response.