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07-24-2013, 11:30 AM | #1 |
Join Date: Jul 2013
Posts: 3
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Help! Check out my cylinder head... wont start
Hey guys,
It's been awhile since I've posted...so far back, that it was the other forum. I have two scoots and a couple of big bikes - one of my scoots, however, is just giving me the worst. 2007? baja sc150- generic chinese gy6 -1700miles I began to have major issues with the valves, and a warning sign was raised when i had to adjust them every couple hundred miles. Well, every couple of hundred went to every single ride. I've heard the metal on these guys is sometimes poor... Then, after paining this for awhile, the valve adjustment had 0 give on the intake side and will not start. The thread i posted about this years ago, everyone told me to just replace the head- I want to make sure this is my issue - here's a picture of the inside of the current head I just took off this morning. The fuzz on the r valve is paper towel from trying to scrub it. Take a look- any advice is welcome. |
07-24-2013, 02:05 PM | #2 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
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You have a lot of carbon, which is most likely caused by bad rings.
Carbon can accumulate if you are running to rich, but your carbon is very extreme, and indicative of burning oil.
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2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats. |
07-25-2013, 04:21 PM | #4 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
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Yes, usually. But dead rings mean you will to ridge-ream your cylinder (jug). I'd get an upper-end rebuild kit, it's easier and cheaper than paying to have your current jug reamed at a machine shop.
You cannot reassemble without a new head gasket, even if the old one looks fine, once the head comes off, it's toast.
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2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats. |
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