Posted November 15, 2001 - 04:08 PM
My question, has anyone else in SLC, UT experince the same problem and if so what carb settings are you currently running. Any suggestions would also be appreciated.
Posted November 16, 2001 - 09:18 AM
Posted November 16, 2001 - 05:05 PM
Get your jetting set correctly and you will be in Heaven.
Posted November 16, 2001 - 05:26 PM
Originally posted by littlemeh:
I live at 4000' and had the same problem. You are rich on the needle circuit. Drop the needle one clip position and this will help out the problem. If the problem persists, you may even have to try two clip positions.
Posted November 16, 2001 - 08:56 PM
Cheapest mod(nothing to buy) to your problem up is rasing the clip position from #4(stock) to #3. You'll notice a big difference for such a small move.
Only adjust the main jet if your getting splutter also at full throttle(do the position mod first though). But I suspect your only getting trouble from 1/4 to 3/4 throtle right? Well it's all needle position.
Posted November 17, 2001 - 02:05 PM
You are right. All of my problems are at 1/4 to 3/4 throttle. I have also fouled two plugs in 300 miles and they are a sticky black. The bike now has around 400 miles on it and the problem seems to be worse with the cooler weather.
I'll try your and Yzernie's advice and change the needle position first before I have the shop mess around with the jetting.
Thanks for all of you help,
Posted November 17, 2001 - 09:03 PM
Posted November 18, 2001 - 02:56 AM
1 - less moisture in the air means more O2
relative to moisture content
2 - cold air is more dense - more O2 per unit
Winter months means jet richer on a PROPERLY jetted carb.
Your ballpark stock jetting should be based at sea level elevations. The higher the altitude, the less O2, meaning you have to jet leaner...
Tar black plug...That IS impressive - mucho rich!
Posted November 18, 2001 - 03:54 AM
I had the exact same problems you are describing. The bike ran great until I had about 500 miles on it and it got colder out. I started to get a mid throttle sputter. It got so bad it fouled the plug. I know conventional wisdom says to jet richer in colder weather. For some reason my bike became very rich in the colder weather. I leaned the needle out one clip and it is now running great.
I know it was cold here yesterday at 40 degrees, hardly a cloud in the sky but the humidity was at 87% I think possibly though the winters are dry fall can be very wet and humid causing the bike to run rich. Maybe a bar mounted weather barometer would be an good add on