no spark

sparkplugeater · 05-31-2018, 09:35 AM

Good morning all. My kid had a vx 80 redcat. for about a month now the machine will run for a little while with a new plug in it. After it is shut off, there is no spark and it needs to be replaced. I have changed the voltage regulator and coil. Any ideas on how to keep the machine from eating plugs? Thanks.

**JerryHawk250** · 05-31-2018, 09:45 AM

What brand spark plug you are using? A good replacement plug would be a NGK BP6HS.

sparkplugeater · 06-04-2018, 10:18 AM

I have used c7hsa 4629, try other one you think?

**JerryHawk250** · 06-04-2018, 10:25 AM

Check and make sure that you have a good ground and power connections. Spark plugs don't burn up that easily. Seems like you may be having other issues such as a weak spark. You have already replace the coil so that should rule that out.
Some of the smaller Cc engines require a slightly hotter plug.

sparkplugeater · 06-05-2018, 11:05 AM

Any ground or connection areas more problematic than others?

sparkplugeater · 06-06-2018, 12:18 PM

Ok I checked every connection that I could find put it in a new plug and it ran for about 5 minutes then quit and will not start back up. Help please

dirtbkr188 · 06-06-2018, 01:47 PM

Just out of curiosity, what does the old plug look like when you remove it? Is it black with oil and/or smell of gas?

Are you gassing the throttle while trying to start the bike (out of frustration to get it to start)?

imapdog · 06-06-2018, 04:43 PM

I'd say your leaking oil into the cylinder if a brisk spark plug fails.
like dirtbkr188 said what does plug look like when it goes bad.

Charc · 06-07-2018, 01:21 PM

I have several honda big reds 200s and a polaris 90 that will eat ngk plugs anywhere from 5-30 min sumtimes itl run yan hr or so until i shut em off then wont start again,if i pull plug and crank bike while grounding plug itl have spark but they wont fire under compression.i also have had many other machines throughout my yrs owning my bike. Atv amd small eng shop do the same thing? I have never found a reason for it at all and i have done everything including replaceing every part on the bike just to try to fix it and nothing works but changing to autolite or champion copper plus or a exp plug of some other than ngk.im not against ngk because in other machines i have owned and worked on they run great and last forever.so i dont know why but some machines just love to eat ngk.? Maybe youve tried autolite or champion,but if not id sure give them a try has worked everytime for me.good luck

FLASHLIGHTBOY · 06-10-2018, 01:04 PM

if your sparkplugs fire when out of the motor... under compression has nothing to do with the spark...... test with an ohm meter.... check the outside case and the electro.... it is ground to the case... how come you go thru so many plugs... strange... I would check the spark coil and try replacing it.... too much voltage.. check to see if you have 12 volts to it... sometimes some people put a resistor in the wiring ... like on older DODGE CARS...

05-31-2018, 09:35 AM	#1
sparkplugeater Join Date: May 2018 Posts: 4	no spark Good morning all. My kid had a vx 80 redcat. for about a month now the machine will run for a little while with a new plug in it. After it is shut off, there is no spark and it needs to be replaced. I have changed the voltage regulator and coil. Any ideas on how to keep the machine from eating plugs? Thanks.
	0

05-31-2018, 09:45 AM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	What brand spark plug you are using? A good replacement plug would be a NGK BP6HS. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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06-04-2018, 10:25 AM	#4
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	Check and make sure that you have a good ground and power connections. Spark plugs don't burn up that easily. Seems like you may be having other issues such as a weak spark. You have already replace the coil so that should rule that out. Some of the smaller Cc engines require a slightly hotter plug. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel Last edited by JerryHawk250; 06-05-2018 at 11:28 AM.
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06-10-2018, 01:04 PM	#10
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	sparkplug if your sparkplugs fire when out of the motor... under compression has nothing to do with the spark...... test with an ohm meter.... check the outside case and the electro.... it is ground to the case... how come you go thru so many plugs... strange... I would check the spark coil and try replacing it.... too much voltage.. check to see if you have 12 volts to it... sometimes some people put a resistor in the wiring ... like on older DODGE CARS... __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
	0

06-04-2018, 10:18 AM	#3
sparkplugeater Join Date: May 2018 Posts: 4	I have used c7hsa 4629, try other one you think?
	0

06-05-2018, 11:05 AM	#5
sparkplugeater Join Date: May 2018 Posts: 4	Any ground or connection areas more problematic than others?
	0

06-06-2018, 12:18 PM	#6
sparkplugeater Join Date: May 2018 Posts: 4	Ok I checked every connection that I could find put it in a new plug and it ran for about 5 minutes then quit and will not start back up. Help please
	0

06-06-2018, 01:47 PM	#7
dirtbkr188 Join Date: Aug 2009 Posts: 516	Just out of curiosity, what does the old plug look like when you remove it? Is it black with oil and/or smell of gas? Are you gassing the throttle while trying to start the bike (out of frustration to get it to start)?
	0

06-06-2018, 04:43 PM	#8
imapdog Join Date: Feb 2018 Location: nashville Posts: 574	I'd say your leaking oil into the cylinder if a brisk spark plug fails. like dirtbkr188 said what does plug look like when it goes bad.
	0

06-07-2018, 01:21 PM	#9
Charc Join Date: May 2018 Posts: 4	I have several honda big reds 200s and a polaris 90 that will eat ngk plugs anywhere from 5-30 min sumtimes itl run yan hr or so until i shut em off then wont start again,if i pull plug and crank bike while grounding plug itl have spark but they wont fire under compression.i also have had many other machines throughout my yrs owning my bike. Atv amd small eng shop do the same thing? I have never found a reason for it at all and i have done everything including replaceing every part on the bike just to try to fix it and nothing works but changing to autolite or champion copper plus or a exp plug of some other than ngk.im not against ngk because in other machines i have owned and worked on they run great and last forever.so i dont know why but some machines just love to eat ngk.? Maybe youve tried autolite or champion,but if not id sure give them a try has worked everytime for me.good luck
	1