sounds like marbles in my top end

[370]

wiould you like me to post links to these articles?

 

[blaster240R]

yes please..........

 

[370]

ask and you shall recieve!!

heres the link for building the leak down tester..


how to build a leakdown tester.. - powersportjunkies.com

 

[370]

and here is the link for using the tool you've built.
how to do a leakdown test - powersportjunkies.com

 

[blaster240R]

i think a co worker of mine might have a leak down tester. would any leakdown tester work or do i need a special one

 

[370]

anyleak down tester will work..

 

[370]

make sure you seal the exhaust port and intake manifold.. chances are your gonna find a leak dude..

 

[blaster240R]

wouldnt i have high idle problems or something cause it runs good other than that noise.

 

[370]

not nessarily. if your jetted fat in the pilot circuit then you woudl have masked that issue..

 

[blaster240R]

ok i was just asking because the problem only happens when i'm 3/4 to full throttle

 

[blaster240R]

what about spraying some carb cleaner around diff places and see if it changes

 

[370]

thats an old skool trick BUT.. you cannot access every seal when it's running to use that method. which is why a leakdown tester works so well.. it; puts equal pressure on every gasket and seal.

 

[yamahaman126]

Have you tried to set your timing back to stock and see what happens?

 

[fmxr47]

you could do a crankcase pressure test to see if its leaking into the combustion chamber, but you can only do about 6psi. on the crankcase test

 

[blaster240R]

sorry guys havent had time to mess with it lately. been busy deer hunting..

 

[370]

you could do a crankcase pressure test to see if its leaking into the combustion chamber, but you can only do about 6psi. on the crankcase test

have you EVER seen the insidee of a 2 cycle? do you know how they work? if putting pressure into the the crankcase area of a 2 cycle engine doesn't also pressureize the cumbustion chamber than the god dman thing WILL NOT RUN.. lemme give youa crash course on how a 2 cycle engine works.. fresh air fuel mixture is inducted INTO the crankcase. then when the piston come downward is pressureizes the crankcase and leaves low pressure above the piston.. naturally thing under high pressure move to areas of low pressure.. you also have a pulling action from the exhaust that also helps pull that fuel charge from the lower end up via the transerfers.. (hense the name TRANSFERs!!) this then fills the are aboe the piston and the piston moves up compressed the mixture above the piston and filling the crankcase , the spark plug fires and you've got combustion... and a fresh fuel charge for the next combustion cycle.. sooo please tell me how exactly your test proves a f*cking thing? are you putting the piston at TDC and doing it and looking for ring seal? because that also WILL NOT WORK

we are talking about a detoantion problem here.. if you would have read the thread i told him to do a leakdown test in search of a leak... which would pull air, lean the mixture and in turn contribute to the detonation by ways of higher than normal cylinder temperatures this coupled with the little bit of timing advance that he has WILL CAUSE detoation..

 

[darealblaster]

have you EVER seen the insidee of a 2 cycle? do you know how they work? if putting pressure into the the crankcase area of a 2 cycle engine doesn't also pressureize the cumbustion chamber than the god dman thing WILL NOT RUN.. lemme give youa crash course on how a 2 cycle engine works.. fresh air fuel mixture is inducted INTO the crankcase. then when the piston come downward is pressureizes the crankcase and leaves low pressure above the piston.. naturally thing under high pressure move to areas of low pressure.. you also have a pulling action from the exhaust that also helps pull that fuel charge from the lower end up via the transerfers.. (hense the name TRANSFERs!!) this then fills the are aboe the piston and the piston moves up compressed the mixture above the piston and filling the crankcase , the spark plug fires and you've got combustion... and a fresh fuel charge for the next combustion cycle.. sooo please tell me how exactly your test proves a f*cking thing? are you putting the piston at TDC and doing it and looking for ring seal? because that also WILL NOT WORK

we are talking about a detoantion problem here.. if you would have read the thread i told him to do a leakdown test in search of a leak... which would pull air, lean the mixture and in turn contribute to the detonation by ways of higher than normal cylinder temperatures this coupled with the little bit of timing advance that he has WILL CAUSE detoation..

omfg are you serious????? God dam it you give good explanations and know EVERYTHING about 2-strokes.....definatly deserves alot of repp!!!

 

[370]

thank you dareal yameel... haha

 

[ROCKSTAR]

well said my good brother...

 

[fmxr47]

i meant a case pressure test sorry for the mixup, im a technician, i think i have an idea on how a 2-cycle works! i meant to pressurize the tranny case and see if any of those seals were leaking, i like to do a leakdown and a case pressure test on 2-strokes