rebuild gone somewhat wrong need help!!!

soberinphoenix77 · 03-26-2019, 08:47 PM

so i had to rebuild half of my top end because i fried the valves (long story) anyways when i unmounted my 157qmj motor i guess i disconnected a ground wire that comes from the grounding terminal so when i tried to start it it would not fire and the wires heated up and started smoking some. there doesn't seem to be any damage but i need to know where this ground hooks to so i can get my scoot on the road again asap

rks · 03-27-2019, 05:26 PM

The engine ground cable is usually attached by one of the valve cover bolts.

soberinphoenix77 · 03-27-2019, 08:56 PM

That's probably it! Thanks rks

soberinphoenix77 · 04-02-2019, 01:26 PM

ok so that is fixed but still wont fire. i have fuel, spark and everything but just won't ignite? what could be wrong?

Roscoe · 04-02-2019, 05:24 PM

check to make sure the camshaft and crankshaft are lined up properly. Also valve clearance. If all that is correct I'd shut the fuel off to the carb, to make sure it isn't flooded and see if it will start a bit using some carb cleaner into the throat of the carb.

parbs · 04-09-2019, 07:05 PM

check the magneto and pickup.

soberinphoenix77 · 04-13-2019, 05:22 PM

just to make sure i'm doing it right. so i tdc and then align the 3 holes on the top to where the 2 small holes are even with the casing and the large is straight out right? also does anyone know the valve clearance on a 157qmj?

03-27-2019, 05:26 PM	#2
rks Join Date: Dec 2013 Location: Western New York Posts: 454	The engine ground cable is usually attached by one of the valve cover bolts. __________________ 2011 Jonway 150cc..16,109 breakdown free miles, and counting
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04-02-2019, 01:26 PM	#4
soberinphoenix77 Join Date: Sep 2018 Posts: 23	ok so that is fixed but still wont fire. i have fuel, spark and everything but just won't ignite? what could be wrong?
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04-09-2019, 07:05 PM	#6
parbs Join Date: Mar 2019 Posts: 6	check the magneto and pickup.
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04-13-2019, 05:22 PM	#7
soberinphoenix77 Join Date: Sep 2018 Posts: 23	just to make sure i'm doing it right. so i tdc and then align the 3 holes on the top to where the 2 small holes are even with the casing and the large is straight out right? also does anyone know the valve clearance on a 157qmj?
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