My Girlfriends blaster I got her
- Thread starter langlsha0
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I got my girlfriend a Yamaha Blaster I thought junk, wasn't liking it(I own a YFZ450 04'). It was purple before paint (94') I believe so we painted top of plastic black with 100's of coats of clear coat (scratch proof) lol it had a loud pop every other stoke and it was shooting oil out of head, so I installed new head gasket and sanded the head to avoid another leak. I took it out today I enjoy the cheap little quad about as much as my YFZ450 but I'm having a issue if it's revved it goes up then just goes quite then pops (sounds like a old hit and miss motor) Im not sure the issue it never dies though. Also exhaust is FMF Fatty pipe and is loose it just slides in and a spring holds it on? I'm guessing needs a gasket of some sort?
2 strokes must be leakproof on both the inlet and the exhaust.
A leaky exhaust will not allow the expelled fuel charge to be fully rammed back into the combustion chamber.
A leaky inlet will allow more air than required into the crankcase which makes for a fuel lean mix, resulting in a hotter burn which will destroy components, usually a piston.
Leak tests should be done on a freshly obtained motor and then at least twice a season.
A leaky exhaust will not allow the expelled fuel charge to be fully rammed back into the combustion chamber.
A leaky inlet will allow more air than required into the crankcase which makes for a fuel lean mix, resulting in a hotter burn which will destroy components, usually a piston.
Leak tests should be done on a freshly obtained motor and then at least twice a season.
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Good advice for anyone that gets a "new" to you machine. Go through it end to end, checking everything.
Leakdown, carb clean and set, mark down jetting and settings, clean filter,lube cables, chain.
leakdown will indicate air leak which will cause lean A/F ratio, which will cause BOOM
Leakdown, carb clean and set, mark down jetting and settings, clean filter,lube cables, chain.
leakdown will indicate air leak which will cause lean A/F ratio, which will cause BOOM
I agree with Larry'sShee. Its way safer to go over it and see with your own eyes whats a potential problem.
What Carb is installed on it? I'd also open it up, clean it out very good, and see what jets are installed. They will have small Numbers priinted on the bottom. Somtimes hard to read, but you should be able to see them.
The Exhaust should have gaskets also. From what I read, I'm taking it you don't have the slip over flange that the springs hold on to the pipe? then the flange blots to the exhaust port to the motor? Take a pic of that and the carb and we'll try to help you more.
Where are you located in PA by chance? I swear I saw that blaster on Pittsburgh's craigslist a few weeks ago.
Fred
What Carb is installed on it? I'd also open it up, clean it out very good, and see what jets are installed. They will have small Numbers priinted on the bottom. Somtimes hard to read, but you should be able to see them.
The Exhaust should have gaskets also. From what I read, I'm taking it you don't have the slip over flange that the springs hold on to the pipe? then the flange blots to the exhaust port to the motor? Take a pic of that and the carb and we'll try to help you more.
Where are you located in PA by chance? I swear I saw that blaster on Pittsburgh's craigslist a few weeks ago.
Fred
We'll thanks a lot guys my first 2-stoke, I'm thinking I need a exhaust flange first. And I've had about 50 Nitro RC cars which are pretty much 2 stroke so tuning them should be kind of similar I'd assume? And another question I've read 100's of forums on what gear oil or oil to use in crank case, I work at autozone and I run a 4stroke wet clutch oil in my YFZ but I'm not sure about what to run in this blisters case I want something easy on the clutch.
Oh and when posting pics would it be better if I post 1 at a time or all at once and the. You have. To swipe or get "photobucket" app? Thanks for all the help guys.
Oh and when posting pics would it be better if I post 1 at a time or all at once and the. You have. To swipe or get "photobucket" app? Thanks for all the help guys.
4 stroke engine oil is fine to run as long as it contains no friction modifiers.
The crankcase in a 2 stroke contains only oil that goes in through the carby, the gearbox is what you should have said.
