I'd like to get my bike ready for colder weather riding. There are a few dual sports here in NJ last week of Oct and 1st weekend of November. Also, a mid-Oct ride in Pa. I assume coldest temps would be in mid 40's in the morning but warming up. Any need to change my jetting on 2009 WR250 with Keihin carb? Main jet 175 Pilot jet 42 Slide 7 Needle has red top, think its JD needle. Clip is in the 2nd from top slot which is the 4th up from the bottom most position. Is the cold I described cold enough to change anything? I read to lower clip (raise needle) to richen fuel and maybe go bigger on pilot and main. If I need to change jets, do I just order individual from JD or somewhere else? The Pa ride will be at much higher altitude than I usually ride. NJ rides are how I usually ride. Bike runs well now at low elevations, warm weather. Thanks Mike
I'd like to buy a Motosportz Lectron but can't spend the dough now. My carb seems to be set up great now. Starts 1st kick with the cooler weather. I'm going to the Hammer Run dual sport ride this Sunday. It's supposed to be in the low to mid 30's in the morning. I'm concerned the bike may not run great in the cold. This will be my first cold weather riding with new to me bike. I think i've read almost all there is to read about carbs and jetting. I have no spare jets to change out, though. So, I read that since cold air is more dense than warm air the bike will be leaned out in cold weather since more oxygen molecules will be stuffed into the same volume of air entering the carb. My question is this -to compensate for more air, and without different jets to change, should I turn the air screw in to allow less air into the carb, thereby 'evening out' the mix? If I don't adjust the air screw then the bike would be lean which would hurt performance and is dangerous to the engine, correct? Maybe I'm worrying about nothing, though. I'm a pretty slow rider so maybe I won't even feel any difference with the weather. What do you guys think?
screw it in mite raise the needle a notch[ lower the clip] it seems odd to me the tmxx on my CR144 doesn't seem to mind cooler temps some guys hafta rejet when the wind blows
