sputtering

Mykal_ · 04-23-2008, 10:45 AM

I have been having a problem with my bike. When I push it above 7500 rpm's or so it will "cut out" or "lose power" and has little power above 7000 before it does that. I have added a new air filter and a 115 carb jet. I'm not sure if it had that problem before I modded it because I didn't push it. I have also drilled the exhaust, only the end and first plate. Could I take the exhaust all the way off just long enough to test if that could be the problem? Maybe a carb problem? Not getting enough gas? Not enough air? I don't know. I have 2k miles on it.

kens97sto171 · 04-23-2008, 10:46 PM

Could possibly be a rev limiter.. But i thought the limiter were closer to 8500RPM on the 200cc bikes. (is it a 200??) you did not say.

Ken

katoranger · 04-24-2008, 08:49 AM

Do you have the stock spark plug yet? If so replace it with a NGK plug.

Also check the connections on the CDI and coil.

I would start with the sparkplug as it probably is fouled.

Allen

tcs · 04-24-2008, 12:53 PM

...and while you're at it, go ahead and put a quality plug wire on, too.

HTH,
tcs

BW · 05-13-2008, 08:33 AM

Had the same problem with my new Viva SX200s, I had a kink in the choke cable.
Kinked the cable when replacing the jet, check the simple/stupid stuff first.

IronFist · 05-13-2008, 09:07 AM

What is the color of the electrodes on the sparkplug? 8O N2r

warrior91 · 05-13-2008, 02:45 PM

my guess is it is overjetted try 1 size smaller main. :wink:

daboostcreep · 03-20-2009, 02:07 PM

My bike is setup the same....foam filter, and a muffler-ectomy. I installed a 115 main jet and now at high RPM it pops and sputters, and literally will not accelerate...it seems it slows down as a matter of fact.

maybe the air/fuel screw???

04-23-2008, 10:45 AM	#1
Mykal_ Join Date: Feb 2008 Posts: 11	sputtering I have been having a problem with my bike. When I push it above 7500 rpm's or so it will "cut out" or "lose power" and has little power above 7000 before it does that. I have added a new air filter and a 115 carb jet. I'm not sure if it had that problem before I modded it because I didn't push it. I have also drilled the exhaust, only the end and first plate. Could I take the exhaust all the way off just long enough to test if that could be the problem? Maybe a carb problem? Not getting enough gas? Not enough air? I don't know. I have 2k miles on it.
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04-24-2008, 08:49 AM	#3
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Do you have the stock spark plug yet? If so replace it with a NGK plug. Also check the connections on the CDI and coil. I would start with the sparkplug as it probably is fouled. Allen __________________ You meet the nicest people on a Honda Clone.
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05-13-2008, 08:33 AM	#5
BW Join Date: Apr 2008 Location: Florida Posts: 52	Check this Had the same problem with my new Viva SX200s, I had a kink in the choke cable. Kinked the cable when replacing the jet, check the simple/stupid stuff first.
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05-13-2008, 09:07 AM	#6
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	What is the color of the electrodes on the sparkplug? 8O N2r __________________ IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________
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05-13-2008, 02:45 PM	#7
warrior91 Join Date: Nov 2007 Location: N.E. Saskatchewan, Canada Posts: 679	my guess is it is overjetted try 1 size smaller main. :wink: __________________ '91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong)
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04-23-2008, 10:46 PM	#2
kens97sto171 Join Date: Mar 2007 Posts: 193	Could possibly be a rev limiter.. But i thought the limiter were closer to 8500RPM on the 200cc bikes. (is it a 200??) you did not say. Ken
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04-24-2008, 12:53 PM	#4
tcs Join Date: Dec 2007 Posts: 117	...and while you're at it, go ahead and put a quality plug wire on, too. HTH, tcs
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03-20-2009, 02:07 PM	#8
daboostcreep Join Date: Feb 2009 Posts: 50	My bike is setup the same....foam filter, and a muffler-ectomy. I installed a 115 main jet and now at high RPM it pops and sputters, and literally will not accelerate...it seems it slows down as a matter of fact. maybe the air/fuel screw???
	0