125cc won’t fire - Page 2

Nicthegreat420 · 09-07-2020, 02:18 AM

Am getting compression, spark and fuel, air mix is correct.
Bike still won’t start up, not even with a bump start.
Nor a fully charged after purchasing for 18 hrs at 2amps brand new 12v battery.
New plugs. Tried 4 new ones all gapped @0.7mm at spec. Also tried 0.6 and 0.8
New wire loom.
New Cdi—Sparks— plus CDai shows timing on a Green LED.
Timing chain and cam timing is set correctly.
Valves are both .05mm, to tao tao HC stock head specs.
Coil does get power to spark plug n from cdi. Kill switch has been bypassed.
It has stock starter in it. Stock Starter button switch. Stock horn.
Carb has been cleaned every inch has been double checked.
New fuel filter n gas gets to carb.
Uni Air filter, oiled n ready.
Needle clip has been changed to all 5 settings, still no starting, it’s catches for a second, never idles anymore.
Not sure what else I’ve not put down but if anyone comes up with ideas shoot em my way please. Anything helps at this point.
I did notice exhaust header gasket was not present when I purchased this bike. Just a wider OD piping. Has aftermarket exhaust, clearly showing a leak, also it always popped on de acceleration downhills.

Only 4 things to make a engine go boom.

Gas
air
compression
spark

Compression is good, it pushes against the starter motor when the battery is very low after many attempts of starting it.
HELP ME

If anyone has any further suggestions feel free to let me know. It’s been a year n the bike still won’t fire up:

09-07-2020, 02:18 AM	#1
Nicthegreat420 Join Date: Oct 2019 Posts: 69	125cc won’t fire Am getting compression, spark and fuel, air mix is correct. Bike still won’t start up, not even with a bump start. Nor a fully charged after purchasing for 18 hrs at 2amps brand new 12v battery. New plugs. Tried 4 new ones all gapped @0.7mm at spec. Also tried 0.6 and 0.8 New wire loom. New Cdi—Sparks— plus CDai shows timing on a Green LED. Timing chain and cam timing is set correctly. Valves are both .05mm, to tao tao HC stock head specs. Coil does get power to spark plug n from cdi. Kill switch has been bypassed. It has stock starter in it. Stock Starter button switch. Stock horn. Carb has been cleaned every inch has been double checked. New fuel filter n gas gets to carb. Uni Air filter, oiled n ready. Needle clip has been changed to all 5 settings, still no starting, it’s catches for a second, never idles anymore. Not sure what else I’ve not put down but if anyone comes up with ideas shoot em my way please. Anything helps at this point. I did notice exhaust header gasket was not present when I purchased this bike. Just a wider OD piping. Has aftermarket exhaust, clearly showing a leak, also it always popped on de acceleration downhills. Only 4 things to make a engine go boom. Gas air compression spark Compression is good, it pushes against the starter motor when the battery is very low after many attempts of starting it. HELP ME If anyone has any further suggestions feel free to let me know. It’s been a year n the bike still won’t fire up:
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