cold starting

[400exrider139]

ok my fourwheelers been sitten for a week or so now and its really cold were im at like in the 30 or 40s, and i can not get that thing started to save my life if you guys have any tips or pointer on how to start this thing in the cold please let me know or i guess it will be sitten all winter, so please help

[DnB_racing]

first thing to help start in the cold is to make sure that you turn your fuel off when done riding and let the gas burn out of the carb! in other words start with "fresh' gas in carb, then when your going to ride turn fuel on and pump throttle a couple of times put choke on and DONT touch throttle while trying to start

[kenny450er]

i pull mine in the garage an fire up the torpedo heater for awhile I'm jetted for 80-90 degree weather the cooler the temp's get the richer it going to get you can always lean it out some

[400exrider139]

do u guys think the valves might need to be adjusted?? or the jetting is messed up??

[DnB_racing]

yes it could be valves but definatly try your jetting first if your plug looks like its out, how does it run? any signs of jetting being off

[400exrider139]

its seems to run fine when its warm outside it starts right up but it does back fire alittle i think i have a 175 in there and i have a full exhaust with air filter cover removed

[DnB_racing]

is it an ex or a trx and year and what carb is in it?

[400exrider139]

04 trx 450r stock carb with dynojets

[mx Eli]

i can start my 04 in -15 degree weather for ice racing

turn on gas
turn choke on
pump it alittle
kick over a couple times
pump again not to much
then kick!!!!

if it doesnt start put a mr.heater on and blow it right on the motor

[Balaz_73*00]

Id say 175 with your setup is a little lean especially if you say it backfires..I dont know if thats your starting issue but Im willing to bet if you check your plug itll be lean. 180-185

[400exrider139]

ya i did just have a slip on on it but changed to a full and never changed the jetting

[MR4Engine202]

"i pull mine in the garage an fire up the torpedo heater for awhile I'm jetted for 80-90 degree weather the cooler the temp's get the richer it going to get you can always lean it out some"



no the cooler the temp is the higher concentration of oxygen there is so as the temp gets lower you need more fuel to keep it from being lean...think of it as when your starting the engine when its cold you need more fuel to start it easier

[400exrider139]

well it was about 60 out today and it fired right up but it just wont do it when its cold outside:confused:

[kenny450er]

Originally posted by MR4Engine202
"i pull mine in the garage an fire up the torpedo heater for awhile I'm jetted for 80-90 degree weather the cooler the temp's get the richer it going to get you can always lean it out some"



no the cooler the temp is the higher concentration of oxygen there is so as the temp gets lower you need more fuel to keep it from being lean...think of it as when your starting the engine when its cold you need more fuel to start it easier ha ha that's funny not to sure what i was thinking when i said that

[quad71]

Adjust the fuel screw turn out to richen, and pump throttle 2 times.