|
Post by scootx on Oct 28, 2018 5:03:46 GMT -5
hi all im new here.. hope someone here can help me.. i have a 50cc gy6 qmb139 scooter.. first one ever.. but i did a 100cc big bore install the other day and i did everything PERFECTLY.. well at least i THOUGHT i did.. gaskets, torque, timing, all that good stuff... but now, im getting oil drips from somewhere i cant really tell, but im sure its around the valve cover.. i have gasketed that thing like crazy, the rubber gasket ive replaced 3 times and even use lots of silicone gasket maker and it will stop for a few hours but then the leak will always return.. also, my oil filter now is ALWAYS just DRIPPING with oil !! i have no idea how to fix this.. is it my "pcv" valve? i have researched and researched that valve and no where can i find how to replace or fix it.. also the 100cc head did not have that "hole" that the egr thingee goes to.. would that be the cause ? i posted 2 video questions about all this but i dont think anyone wants to watch my videos asking my questions lol.. im just so confused.. is there ANYONE out there that can help me with this ?
|
|
|
Post by scooterpimp on Oct 28, 2018 8:22:01 GMT -5
Im assuming you mean air filter is getting oily? Like your sucking oil from breather on valve cover ? How much silly-cone did you use? If valve cover is filling with oil, did return holes get plugged/blocked ?causing rocker area to fill up & not drain down ? just tossin ideas out there
|
|
|
Post by scootx on Oct 28, 2018 18:00:39 GMT -5
Im assuming you mean air filter is getting oily? Like your sucking oil from breather on valve cover ? How much silly-cone did you use? If valve cover is filling with oil, did return holes get plugged/blocked ?causing rocker area to fill up & not drain down ? just tossin ideas out there yea lol i meant AIR filter... bear with me lol im VERY new to all this... thanks for the reply though... once i figure out how all the parts work and their functions i KNOW i can take off on my own fixing this thing.. i could EASILY just buy a new scooter but i want to learn all this very bad and i just want to do it all myself because it just feels better when you ride!! but anyway, after i installed that big bore kit ive had nothing but bad problems.. now i can only ride for about 20 minutes before the engine starts to get LOUDER or something and begins to lose power.. im guessing that its overheating after about 20 minutes..? how would i ever go about fixing THAT?? and i ordered another non-egr valve cover.. just in case this one is bad or something.. as far as the oil getting in my air filter, im not sure if it's coming from the carberator big hose or the little hose coming from the valve cover ? hmmm or BOTH ?? question: lets say i figure out the cause... IS IT POSSIBLE TO FIX THIS OIL PROBLEM in the air filter ?? gosh i just wish i knew more about this engine... ive only been studying the gy6 engine for about a week now, but i WAS able to install a 100cc big bore kit and get it running, but now i have oil leak, oil in the filter, and an overheating problem... hmmm what do i do ? btw.. im good about helping people out that help me... thanks :0)
|
|
|
Post by milly on Oct 28, 2018 18:06:51 GMT -5
scootx I listened to your video earlier and your valve clearance's sound like the gaps to big. Will listen again soon but off to bed in a bit, they been mucking about with putting the clocks back an hour here in the U.K. Deffo not right all that oil blowing out into the air filter though quite a puddle under the scoot.
|
|
|
Post by scooterpimp on Oct 28, 2018 18:10:20 GMT -5
If oil isnt draining back to crankcaseor is slow from cyl. Head. Oil level in crankcase will run low & cause damage. Run motor for short time. Then pull off valve cover to see if its filled with oil. If there is excessive oil staying in valve cover area that would explain persistent leal & vent hose to air filter box sucking in oil..
|
|
|
Post by scootx on Oct 28, 2018 18:12:25 GMT -5
scootx I listened to your video earlier and your valve clearance's sound like the gaps to big. Will listen again soon but off to bed in a bit, they been mucking about with putting the clocks back an hour here in the U.K. Deffo not right all that oil blowing out into the air filter though quite a puddle under the scoot. thanks sooo much... no hurry at all.. im gonna take my time with this project.. im learning more and more everyday... thanks again... i will make a better video tomorrow.. i was on my break from work and was in a BIG hurry when i made that video.. thanks again :0)
|
|
|
Post by scootx on Oct 28, 2018 18:15:17 GMT -5
scootx I listened to your video earlier and your valve clearance's sound like the gaps to big. Will listen again soon but off to bed in a bit, they been mucking about with putting the clocks back an hour here in the U.K. Deffo not right all that oil blowing out into the air filter though quite a puddle under the scoot. .004 ... however they may have slipped or something... thanks :0)
|
|
|
Post by scooterpimp on Oct 28, 2018 18:38:58 GMT -5
Sounds like you may want to retrace your steps on the bbk install. Better safe than sorry. Leaks , noises , power loss. Something a miss.i saw your video , that pair pipe can be tossed out if you wish. If new cyl has no hole for it its blocked off . But follow big hose from part on valve cover to the black filter thing is and verify small vacume hose that goes to side of intake is capoed off at intake.one side feeds vacume petcock (leave there) other side is vacume for pair system and can be capoed off. Jumping from a running car is a bit too much for the scoot, be careful. There is a thing in tech section on pair system removal..hope any of this helped? I can confuse myself easily sometimes.
|
|
|
Post by scootx on Oct 28, 2018 19:15:38 GMT -5
Sounds like you may want to retrace your steps on the bbk install. Better safe than sorry. Leaks , noises , power loss. Something a miss.i saw your video , that pair pipe can be tossed out if you wish. If new cyl has no hole for it its blocked off . But follow big hose from part on valve cover to the black filter thing is and verify small vacume hose that goes to side of intake is capoed off at intake.one side feeds vacume petcock (leave there) other side is vacume for pair system and can be capoed off. Jumping from a running car is a bit too much for the scoot, be careful. There is a thing in tech section on pair system removal..hope any of this helped? I can confuse myself easily sometimes. okie.. in my mind i can picture what you are saying.. i did get kinda lost in your words lol during the middle there but i think i understand what you are saying.. i have to do it in my head .. so ill look to make sure a valve is capped off.. and this is getting closer to solving this mystery ? i wonder, how many possible problems arrise with this gy6 device? i mean, there's got to be a relatively common series of problems right ? sori, im sooter land language illiterate, but as soon as i figure out how everything works, i can catch this oil leak somehow.. i mean, this can be a symptom of a lot of OTHER scenarios right? oh well, first thing in the morning i will go look and make sure that valve is capped off.. i think i can find it maybe.. but anyway, as of now as besides all this, the engine WILL run pretty good AND with lots of power believe it or not, BUUUUT, after about 20 mins or so, the engine will start to get slightly louder and seems to "tire" a little and i feel the seat getting a little warmer beneath me.. that CAINT be good.. i wonder how to remedy THAT ? oh well but anyway i almost forgot, i made another video to help explain all where im comin from:
|
|
|
Post by scooterpimp on Oct 28, 2018 19:40:44 GMT -5
#1 With the overheating problem, did you increase the main jet size in the carburetor after 100 cc big bor was installed? If not that is why your engine is running hot /lean. #2 The valvecover oil leak needs that stripped bolt replaced or threads in head repaired to stop leak.#3 the oil in airbox should be cleaned out & monitored after proplems #1 & #2 are fixed. May i suggest that you take care of one repair/problem at a time so you dont accidentally cause yourself more headaches in the future. We do what we can to help our fellow scooterists out. We all been where your at now..
|
|
|
Post by scootx on Oct 29, 2018 9:15:15 GMT -5
#1 With the overheating problem, did you increase the main jet size in the carburetor after 100 cc big bor was installed? If not that is why your engine is running hot /lean. #2 The valvecover oil leak needs that stripped bolt replaced or threads in head repaired to stop leak.#3 the oil in airbox should be cleaned out & monitored after proplems #1 & #2 are fixed. May i suggest that you take care of one repair/problem at a time so you dont accidentally cause yourself more headaches in the future. We do what we can to help our fellow scooterists out. We all been where your at now.. no i did not increase jet size... but i do have a new carberator.. a ken hin (sp) should i just install this one? what size jet do i need ? thanks
|
|
|
Post by scooterpimp on Oct 29, 2018 10:13:45 GMT -5
Would start around #80 on main jet , stock is 75 ,
|
|
|
Post by scootx on Oct 29, 2018 10:58:32 GMT -5
okie i found the intake thingee beside the carberator hose like thing that goes into the engine and there was a hose leading from there to some kind of round alumium thingee that comes from the gas tank.. should i remove this and then cap off the little valve hole ?
|
|
|
Post by scooterpimp on Oct 29, 2018 11:15:52 GMT -5
That I think is your gas petcock
|
|
|
Post by scootx on Oct 29, 2018 12:08:17 GMT -5
okie here is a video i made a few minutes ago about capping off that intake hole valve thingee.. and also i got the engine running so you can hear but the camera mike kinda distorts what the engine REALLY sounds like kinda.. but anyway thanks again
|
|