Since im not too good with 2 strokes yet, and im new here, I needed help fixing my carb or whatever is wrong with my blaster.. I got the blaster after my old 3 wheeler was stolen X( and the guy My dad bought it from owns a salvage place. He said he replaced the carb on it because it wasnt the original carb (?) and put the correct one on there he tried starting it and it revved wide open and he couldnt get it to shut off (someone messed with the kill switch when adding a kill tether).. Im sure my blaster needs to be rejetted because it has a full (leaky) lrd exhaust and i cant find a way to fix the leaking. Anyways, So when my dad and I brought it home, the day after we got it we started it up with no choke... The machine revved up uncontrolably like a bat out of hell and i pulled the choke all the way out then it lowered back down to a reasonable idle. I let it run for about 5 minutes then turned the choke back off and it revved up wide open again. i turned on half choke and it lowered a little bit but not where it should be.. i pulled the choke out and rode it around for a few minutes.. ran fine. Noticed a terrible vibration and misfire at lower rpms when getting onto the throttle.. after it hits the power band it is fine though. I havent dinked with the jets or air screw or anything.. all i did was clean the carb, Thing looked like it was brand new to begin with.. So can anyone tell me what the problem might be? i dont think its the main seal.. or if that has anything to do with it. anyways... Thanks in advance!
Can only idle right on full choke? Im a noob
- Thread starter Monkeyblaster
- Start date
my guess is theres a airleak somewere, reason is becuase the choke richens the mix and cuts off the air, and if theres a airleak then its sucking air in somewere else therefor if the choke is all the way in it will bog or not run right becuase theres to much air
Tors and everything is removed... air filter and lid are secure... Pictures arecrappy.. shivering my ass off in the 20 degree weather... i dont have time to dig into the carb.. i might be able to tommorow though ive got more pictures... only thought those were relevant.. i know it has some goopy oil stuff covering the bottom side of the motor..
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i can tell you its probally a airleak and what is your main jet it should be at least 270 if not higher
I have no idea... haha i just want to know what might cause that to rev like that and possible ways to solve it..
its probally a airleak. its sucking in air somewehere and leaning out the mixture causing it to idle way high. plus its cold as hell where your at you said so thats making it even leaner, dont even start it up untill you fix the problrm, you will fry your motor
? ive ridden it about 6 times since for about 15 minutes.. i figured that if its running right with the choke on just leave it on? i dont know..
besides the above mentioned leakdown test......
i'd start with a proper carb cleaning:
http://www.blasterforum.com/carburetor-138/how-clean-your-carb-pics-209/
and:
http://www.blasterforum.com/carburetor-138/easy-almost-free-way-stop-leaky-carbs-33335/
followed by setting your floats:
http://www.blasterforum.com/carburetor-138/float-heights-how-adjust-them-50565/
then adjust your airscrew/pilot circut
http://www.blasterforum.com/carburetor-138/adjusting-your-airscrew-pilot-jet-51060/
i'd start with a proper carb cleaning:
http://www.blasterforum.com/carburetor-138/how-clean-your-carb-pics-209/
and:
http://www.blasterforum.com/carburetor-138/easy-almost-free-way-stop-leaky-carbs-33335/
followed by setting your floats:
http://www.blasterforum.com/carburetor-138/float-heights-how-adjust-them-50565/
then adjust your airscrew/pilot circut
http://www.blasterforum.com/carburetor-138/adjusting-your-airscrew-pilot-jet-51060/
Thanks you guys! ill try it tommorow.. with a heater! haha nice toasty garage wouldnt that be great! ... lol
How would i do that? haha Can you guys tell what year my blaster is i cant figure it out.. it has a white nose cone.. i spray painted it black...
you have to run the vin # to see what year, some colors were multiple years..........
http://www.blasterforum.com/do-yourself-20/yamaha-vin-decoder-22562/
build and use a leakdown tester..about $20,
finding an airleak before your piston frying begins = priceless !........
http://www.blasterforum.com/do-yourself-20/build-use-leakdown-tester-10663/
http://www.blasterforum.com/do-yourself-20/yamaha-vin-decoder-22562/
build and use a leakdown tester..about $20,
finding an airleak before your piston frying begins = priceless !........
http://www.blasterforum.com/do-yourself-20/build-use-leakdown-tester-10663/
Misinformation right here ^^^^^ Would you care to explain how and where it "cuts off the air" ??
It is really not a choke, it is an Enrichening circut
A choke is a mechanical device that closes off, restricts, or chokes the air flow.
X-222 on not riding until air leak is fixed. Or continue riding and when it blows up we can give more expensive advice on getting it rebuilt, your choice really. You can get lots of help and advice for free on here, your choice to take it or not. 8-|
The Runaway engine is your clue that something is REALLY WRONG . Might not be anything wrong with wires/switches, as at a certain point a Blaster can run just like a RC car
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