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Posted by: spjohn
Sometimes it's just a ground screw backing out. Other times I've had to check the connections going into the various kill switches. My experience after a year and a half has always been something simple like that. Like people say on here, if you don't like to wrench don't buy a Chinese quad.
Posted by: Chopper400ex
Khealy, The plug you need is a NGK D8EA.
Posted by: yamoto150owner
Most times for me it is the spark plug. if your engine uses a A7RTC( or something like that) Use a NGK C7HSA and replace that piece of junk plug. If replacing the plug does not help try disconnecting the (1) black and white from the cdi and try starting it. if it starts that means that there is something wrong with the kill switches. Just ask for more inf if needed
P.S. If you disconnect the wire from the cdi , you have to disconnect the spark plug wire to turn the atv off.
Posted by: yamoto150owner
it should say in the manual exactly what it is, but commonly on the Kazuma and Redcat 50cc ATVs i don't need to adjust the gap.
Posted by: billl2099
thats correct NGK is the brand name spark plug is C7HSA
Posted by: BiggusBlockus
I just bought a Chinese made ATV - title sez the manufacturer is ZSMOT (never heard of them).
It was running great - we ran through 3 tanks of gas between my daughter and the neighbor kids riding it. It just quit once. We got it restarted and then it quit again and will crank - but no spark (pulled plug and checked).
Is there are common failure point to start with on these little Chinese 50s? I'm guessing the coil is bad. Any advice appreciated! Thanks
Posted by: BiggusBlockus
Thanks - I'll try the simple stuff first. What is the correct plug gap? I just bought a new NGK plug just before I read your post! I will also check all connections.
Posted by: BiggusBlockus
yamoto150owner,
Excellent advice! I changed the plug out and she fired right up.
Now, I have another electrical problem. I think this will be my first & last Chinese quad.
While I was putting the plastic back on, I wiggled a four way connector and the quad just shut off. The fuses are good, all the connections look good. I'm not an electrician by any means.
Posted by: Khealy007
Hey, I own two chinese atvs and they run pretty good. I haven't really had the chance to beat them up to much but they have preformed quite well on the railroad grades by my home. My wife has a fully automatic Komot 150ST and I have the 4 spd Komoto 250stw. I too need to replace the spark plug for the 250STW, the OEM is an LG D8TC and it is a piece of junk. Do any of you know the conversion to NGK? or any other brand?
Posted by: SilveradoSS
BiggusBlockus, I had the same problem with my sons Coolster 110cc. The harness plugs in the wire harness are crap and don't make a solid connection. After bouncing around awhile, my sons quad would start backfiring and eventually stall due to a loose pin connection in one of the plugs. I took all of the harness plugs apart and tweaked the pins in the connectors to make a connection with some resistance when plugging them together. This fixed his random stalling/backfiring.
Posted by: criatvchino
I have 4 chinese ATVs
all them use the A7RTC spark
and I cannot find the spare....
Did u try the HGK C7HSA as spare? does it work?
