03SHEELE Posted January 1, 2012 Report Posted January 1, 2012 So heres my setup. Jetting was ok this summer. elevation about 200ft, current jetting is 360 main, stock needle midle clip, 32.5 pilot, stock carbs with open air box with K&N pro flow filter, 4mm crank long rod with mx hardcore port job from HJR, T5 pipes running pump gas with 23 13/110 domes with the cool head. Im new to 2 stroke bikes so would like input as to if i should change my jetting for the winter. Heres a pic of the right plug after i took a litle 30 minute ride. Could not get much WOT on here because it was so icy. the Left plug loked the same as the right one Temps was about -8 C that day... average temps for winter here is about -15 to -25C. Quote
dunebuggy09 Posted January 2, 2012 Report Posted January 2, 2012 first off is this a reading after just playing around? make sure when u do a correct plug reading that u do a wide open throttle through all gears. then pull the clutch in and kill the motor. if u already know this i apologize. besides that your plug looks pretty good. im sure you could go a little leaner on your main jet, just keep an eye on your plugs. also what is your timing set at? Quote
03SHEELE Posted January 2, 2012 Author Report Posted January 2, 2012 first off is this a reading after just playing around? make sure when u do a correct plug reading that u do a wide open throttle through all gears. then pull the clutch in and kill the motor. if u already know this i apologize. besides that your plug looks pretty good. im sure you could go a little leaner on your main jet, just keep an eye on your plugs. also what is your timing set at? yea i know i should do a WOT through all gears but the icy trails that day did not agre with that! lol just tought i'd check them to give me an idea how my jetting is in more normal driving. Quote
esterelbanshee Posted January 2, 2012 Report Posted January 2, 2012 Go 3 jet sizes up for winter Quote
03SHEELE Posted January 2, 2012 Author Report Posted January 2, 2012 Go 3 jet sizes up for winter 3 up for the main only?? should i up the pilot and touch the needle position? Thanks for the help guys Quote
03SHEELE Posted January 2, 2012 Author Report Posted January 2, 2012 oh and as for timming, i have it a 0 right now. Does going to +4 timming meen i would have to change the jetting.. would it be ok for the winter months? I just tought to run it at 0 for winter and change it to +4 for the summer timer. Sorry for all the newb questions lol Quote
30years Posted January 2, 2012 Report Posted January 2, 2012 I live in MI and during the winter, I was always told its kind of a rule of thumb to go up one or two main jet sizes and bump ur clip down one notch. Better to run rich than lean! Quote
salmon_slayer06 Posted January 2, 2012 Report Posted January 2, 2012 I would go up one size on all the jets and raise the needle by one clip. Quote
03SHEELE Posted January 3, 2012 Author Report Posted January 3, 2012 I would go up one size on all the jets and raise the needle by one clip. does timing affect the jetting? Is it ok to advance the timing to +4 in the winter? Quote
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