I have a 2003 yamaha blaster and it dosent want to run right. Im not sure if it is just the cold weather or something wrong with it. Every time is start it when its cold, it starts to sputter out at higher RPMs but im pretty sure its warmed up after a little while and it continues to do it. it start running realy crappy at first when I ran out of gas in my on position so i switched it to reserve and it just ran realy crappy. I had a really crappy cable that puts oil into the carb so I cut the tip off and put it on the carb because it was all torn up before. I drained all the gas in it and filled it back up with a little bit. After about ten miuates it started working again but then it started to do it again after a few minites. I have no idea what to do. If you think you know what might be wrong with it please respond.
HELP!!!
- Thread starter 03whiteblaster
- Start date
Ok my first question is do you have any mods and do you have stock jetting? It sounds like your jetting is off.
Wow that was hard to read. Do an Leak down test with a leaktester tool. Do a compression test too. No cable put oil in the carb , a hose maybe, is there oil in the tank?
^^^^^ all the above.
I worry some that the oil injection hose was split at the carb end.
Is there any signs of oil in the area where the hose fits to the carb, if so do a compression test to see if any damage was done from a poor oil supply.
Cold weather calls for one or more larger main jet sizes.
In reading the end of your post it looks like you have crap in your tank and your carby.
I worry some that the oil injection hose was split at the carb end.
Is there any signs of oil in the area where the hose fits to the carb, if so do a compression test to see if any damage was done from a poor oil supply.
Cold weather calls for one or more larger main jet sizes.
In reading the end of your post it looks like you have crap in your tank and your carby.
After you clean the carb and adjust the float, take tank off, take petcock off and clean tank out. List any and ALL modifications done to it. While you have carb ALL apart for cleaning, write down jet sizes and clip posistion of needle in slide. When reassembling set air screw at 1 1/2 turns out to start. Keep us informed !! Also check that tank vent works and hose is clear.
Everyone above me has made good points. also. i want to throw out there: -- i always make the suggestion to eliminate that oil tank and (based on what you want to do.. and your modifications) run at a 32:1 or 40:1 premix ratio. And as everyone said.. ALWAYS ALWAYS remember to check your jetting.
I used to ride at temps right around 10 degrees or so. I would sputter like a fiend until i pulled my jets and bumped them up a size. and after (if you do) switching to the premix, also check your jetting, just in case.
Change your sparkplug, and try again. (upon changing your plug, don't forget to check the colors on the plug.. i know there's a guide on here, but i absolutely suck at linking things to posts
)
I used to ride at temps right around 10 degrees or so. I would sputter like a fiend until i pulled my jets and bumped them up a size. and after (if you do) switching to the premix, also check your jetting, just in case.
Change your sparkplug, and try again. (upon changing your plug, don't forget to check the colors on the plug.. i know there's a guide on here, but i absolutely suck at linking things to posts
)
Unless the oil manufacturer states otherwise always pre mix at 32:1. In saying this, if you do change your ratio, remember to change your main jet.
A 2 stroke engine under 400cc should not be run at less than 32:1
i would say its your jetting,or thats what it sounds to me,i had the same problem,if you have anymods(like fmf pipe&silencer) i used a 280 main jet and removed the air box lid and it runs great!
It is all 100% stock I believe and I've never driven it in the winter so I figured it was jetting but didn't know for sure. I just cleaned the carb a few days be fore that and put a new float and float pin. I'll try the jetting
/\/\/\ there ya go...mystery solved
new floats do not come set to the correct adjustment
which is 20-21.5mm
measured like this.................
Never mind, I found one. Thanks everyone I hope that this all works and BTW, couldn't adjusting the float stop it from leaking gas possibly?
Blaner
Your Friendly South African Ambassador
I adjusted the float and cleaned out the main jet and it dosent seem to do it anymore but it isnt getting enough gas into it because i cant idle for more than 10 seconds and when im going, if i pin it, it will not go for a second after I do it. The throttle also likes to stick now after i do that and im not sure why. I dont think it has to do with the cable though
