OK, going to try to give as much details as I can, i hope this makes sense.  I have already drilled out the little plug and made that adjustment.  I have replaced the jets in the lower 1/2 of the carb.  I have not yet done anything with the top side of the carb yet.

When i start the bike, 2005 S40, the idle is a bit lower as things are running a bot cool.  If i roll the throttle a bit off of idle, it starts crapping out.  To the point where the bike can complete die and has to be restarted.  If i roll the throttle past that point everything runs normal.

After she warms up, idle is faster than when cool, and rolling the throttle is more normal.

Thoughts?

JutMan wrote on 06/29/15 at 08:42:06:

OK, going to try to give as much details as I can, i hope this makes sense.  I have already drilled out the little plug and made that adjustment.  I have replaced the jets in the lower 1/2 of the carb.  I have not yet done anything with the top side of the carb yet.

What adjustment? What jets did you install?

JutMan wrote on 06/29/15 at 08:42:06:

When i start the bike, 2005 S40, the idle is a bit lower as things are running a bot cool.  If i roll the throttle a bit off of idle, it starts crapping out.  To the point where the bike can complete die and has to be restarted.  If i roll the throttle past that point everything runs normal.

After she warms up, idle is faster than when cool, and rolling the throttle is more normal.

Thoughts?

You should adjust the carb to run properly at normal operating temperature. When cold are you running it on or off choke?

We need more details about your jets, tuning and atmospheric conditions. What you describe could be a small adjustment...or completely normal.

remember, give the guy a chance to reply or else we're inventing issues.

Had to go back to ebay to find the jets..
I like in Eastern, PA for the location in the Poconos.

Main Jet: #150
Pilot Jet: #55 BS30/96

I adjusted the screw out about 1.5 turns then maybe a bit more. This was all done to try and eliminate the backfire, but she still backfires on shutdown and a bit when decelerating.  I also forgot to mention that I also replaced the muffler with a Dyna as recommended.

I have never tried to ride with the choke pulled.

Gary_in_NJ wrote on 06/30/15 at 10:39:03:


I love the backfire, gets a bit of attention and the wife knows when I am home I will let it warm up before trying the 1/4 turns.  I do not think that I let it warm up before when I set it.

Adjusted the screw full in and then out 1.5 turns to start a baseline.  I think it may have worked it's way out a little from the last adjustment.  I had to turn it in about 2 full turns to begin screwing it back out.