Well we had about 2 inches of ice and snow a couple days ago and the doesnt like it. Sometimes it runs ok, then sometimes it runs real shitty. It wont rev past like 1/4 throttle. It just bogs down and cuts out. I was thinking mabye its a short somewhere so i reached down to pull out the kill switch wires, thinking it would help, and i got a nice shock. After i turned off the bike and pulled em out it still runs bad. It seems like it runs better when i have the choke on. I was thinking its a clogged main jet, but it goes away after a while so i dunno. Anybody else had this problem?

 

move to Texas.............toooooooooo DAM cold there, thats whats wrong..........lol

 

mine did the same and i did the same thign ahahha

but mine runs good after i adjust3ed the needle. i thikn i was running to rich maybe i dont know. I should run more lean when the air is cold

???

 

Take a look at your spark plug cap... is it broken or cracked?

 

fiddy's don't like the cold... that's all there is to it. it'll act up untill it's properly warmed up, and having the choke on will lean it out and make it run hotter, warming the bike up quicker but too much might make it stall in the cold b/c the air is already so dense. you just have to be paitent and let it warm up before trying to tear it up on one wheel. don't worry my piece wouldn't even start in this cold *** weather (~15F here). oh and imprezawd is wrong, you want to tune the bike to run slightly more rich in the cold, b/c cold air is more dense, naturally making the bike run leaner...
B

 

i have the same problem and its bcuz the spark plug cap is cracked and water gets on the spark plug and shorts it out

 

Doesnt the choke make it richer because it cuts off air to the engine? Anyways i dont think thats the problem because it's already warmed up when it starts acting shitty. I put a fuel filter on it last night just incase the main jet was getting clogged, but i havent actually taken it apart to clean the carb yet. Ill go check the spark plug cap and see if its broken. Thanks for the help

 

do you guys have aftermarket filters???? in the snow they'll get really wet and you may be sucking up enough water to make it cut out and sputter???

 

Going up one size on the main jet without any other carb modifications cures the problem 95% of the time.

 

Ive got the stock filter and my friends works fine, so i dont think its the jet, but i dunno. I still gotta check that plug cap...

 

XR70 plug caps are made of rubber. Just throwing that out there.. Got tired of busting stockers every ride.

 

Clean ur air filter, change the plug (get one number lower on a ngk plug) and check the cap, try riding with choke on (try both levels), try new gas, clean the carb, warm the bike up good. If it bogs stop and put it in neatrual and rev it up for a couple of seconds, that always help cure bogging problems for me.

 

Well guys i checked the spark plug cap again today and when i pulled off the rubber part on the end, the plastic piece was nice and broke. Anybody know where to get a new one? You say an xr70 one works? Right now its just duct taped together... Thanks for your help

 

I had the same problem and it was the spark plug cap once i changed it it ran like a champ cheap fix 2 only like three bucks worth a try good luck

 

I'm not sure about you but where I'm from the choke causes an overrich condition, thus combating the natural cold/lean problem you discussed earlier in your post.

 

you have to adjust the mixture when you change weather drastically or change altitudes