sputtering at 7.5k RPM

leesic66 · April 29th, 2010, 12:14 AM

Hi! so I was on the freeway tonight and when I tried going over 7.5k rpm it started to sputter. It only started doing this tonight.

Also some a-hole tore a hole in the side of my muffler >:O could this have anything to do with it?? Please help!!!

kkim · April 29th, 2010, 01:27 AM

Quote:

Originally Posted by leesic66

Also some a-hole tore a hole in the side of my muffler >:O could this have anything to do with it??

did your bike sputter before you had a hole in the muffler? does the bike continue past 7.5K w/o problems?

leesic66 · April 29th, 2010, 01:30 AM

nope no sputtering before my muffler mishap. I rode it jus a lil while ago and it has a hard time gettin past 7.5-8k I got it to 10k but was still sputtering and it wasnt going as fast as it should have. I was goin like 78mph at 10k

kkim · April 29th, 2010, 03:02 AM

can you post a pic of the hole in the muffler?

perhaps a quick fix with some aluminum tape to seal the hole can tell you if it's the cause of the sputtering.

leesic66 · April 29th, 2010, 09:16 AM

yeah im gonna try to plug the hole today. I still havent had my valves adjusted yet. Do U think that could be the cause of it?

kkim · April 29th, 2010, 11:50 AM

it might... but I would suspect the hole in the muffler if this started right after that happened. always start w/ the easiest fix first.

btw, how many miles since the last valve adjustment?

leesic66 · April 29th, 2010, 12:20 PM

lol i dont know! it has like 16k overall. Its an 05. The PO had let it sit from JAn. - April and I dont think ANY service was done on it. I am takin it to Rev Tek tomorrow for valve adjustment and CCT replacement. Cuz there is a clacking noise coming from the tp of the engine on the right hand side.

leesic66 · April 30th, 2010, 03:07 AM

I was thinkin that maybe Im lean. I dont have backfire but its like not enough gas is goin in for that kind of RPM....IDk

drstimpy · April 30th, 2010, 05:11 AM

Interesting to see what happens when you plug the hole. Might have leaned up a bit with the accidently freer flowing exhaust?

leesic66 · April 30th, 2010, 09:37 AM

would it still be lean even after I plugged the hole?? I did that yesterday and its still lagging once I reach 68mph and above.

HotWheels · May 15th, 2010, 09:52 PM

Hey there. I didin't think the hole was the culprit originally when reading it how ever I was suspicious. Since you've plugged the hole and are still getting ill effects, the next thing I would jump on would be a thorough carb cleaning assault with a small copper wire in hand as well. 7.5 is right about where the biggest part of the main jet comes into play how ever it does affect everything below it as well. These carbs can get get a little tacky in there so easily...=/

When rejetting for my Muzzy, that was where the hard cold/warmed up acceleration took place to determin the proper main jet size. Mine have been clogged a couple times. Grab some carb cleaner and some 18 gauge copper wire and declare war.

JBar215 · June 2nd, 2010, 11:03 PM

I have an 2005 with the same clacking issue but not the sputtering at all but it does idle a little rough. any help on this? Do i need to adjust the valves?

April 29th, 2010, 12:14 AM	#1
leesic66 ninjette.org member Name: Lee Location: Honolulu Join Date: Apr 2010 Motorcycle(s): 2005 Ninja 250 Posts: 17	sputtering at 7.5k RPM Hi! so I was on the freeway tonight and when I tried going over 7.5k rpm it started to sputter. It only started doing this tonight. Also some a-hole tore a hole in the side of my muffler >:O could this have anything to do with it?? Please help!!!

April 30th, 2010, 05:11 AM	#9
drstimpy two wheels good Name: john Location: Wareham MA Join Date: Mar 2010 Motorcycle(s): 04 ex250 and 08 Triumph Sprint ST and custom calfee carbon race tandem Posts: 71	Interesting to see what happens when you plug the hole. Might have leaned up a bit with the accidently freer flowing exhaust? __________________________________________________ Some must watch while others must sleep

May 15th, 2010, 09:52 PM	#11
HotWheels ninjette.org member Name: Brandon Location: San Luis Obispo Ca. Join Date: Feb 2010 Motorcycle(s): EX 250 Posts: 24	Carb clean Hey there. I didin't think the hole was the culprit originally when reading it how ever I was suspicious. Since you've plugged the hole and are still getting ill effects, the next thing I would jump on would be a thorough carb cleaning assault with a small copper wire in hand as well. 7.5 is right about where the biggest part of the main jet comes into play how ever it does affect everything below it as well. These carbs can get get a little tacky in there so easily...=/ When rejetting for my Muzzy, that was where the hard cold/warmed up acceleration took place to determin the proper main jet size. Mine have been clogged a couple times. Grab some carb cleaner and some 18 gauge copper wire and declare war.

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April 29th, 2010, 01:30 AM	#3
leesic66 ninjette.org member Name: Lee Location: Honolulu Join Date: Apr 2010 Motorcycle(s): 2005 Ninja 250 Posts: 17	nope no sputtering before my muffler mishap. I rode it jus a lil while ago and it has a hard time gettin past 7.5-8k I got it to 10k but was still sputtering and it wasnt going as fast as it should have. I was goin like 78mph at 10k

April 29th, 2010, 03:02 AM	#4
kkim Join Date: Nov 2008 Posts: Too much.	can you post a pic of the hole in the muffler? perhaps a quick fix with some aluminum tape to seal the hole can tell you if it's the cause of the sputtering.

April 29th, 2010, 09:16 AM	#5
leesic66 ninjette.org member Name: Lee Location: Honolulu Join Date: Apr 2010 Motorcycle(s): 2005 Ninja 250 Posts: 17	yeah im gonna try to plug the hole today. I still havent had my valves adjusted yet. Do U think that could be the cause of it?

April 29th, 2010, 11:50 AM	#6
kkim Join Date: Nov 2008 Posts: Too much.	it might... but I would suspect the hole in the muffler if this started right after that happened. always start w/ the easiest fix first. btw, how many miles since the last valve adjustment?

April 29th, 2010, 12:20 PM	#7
leesic66 ninjette.org member Name: Lee Location: Honolulu Join Date: Apr 2010 Motorcycle(s): 2005 Ninja 250 Posts: 17	lol i dont know! it has like 16k overall. Its an 05. The PO had let it sit from JAn. - April and I dont think ANY service was done on it. I am takin it to Rev Tek tomorrow for valve adjustment and CCT replacement. Cuz there is a clacking noise coming from the tp of the engine on the right hand side.

April 30th, 2010, 03:07 AM	#8
leesic66 ninjette.org member Name: Lee Location: Honolulu Join Date: Apr 2010 Motorcycle(s): 2005 Ninja 250 Posts: 17	I was thinkin that maybe Im lean. I dont have backfire but its like not enough gas is goin in for that kind of RPM....IDk

April 30th, 2010, 09:37 AM	#10
leesic66 ninjette.org member Name: Lee Location: Honolulu Join Date: Apr 2010 Motorcycle(s): 2005 Ninja 250 Posts: 17	would it still be lean even after I plugged the hole?? I did that yesterday and its still lagging once I reach 68mph and above.

June 2nd, 2010, 11:03 PM	#12
JBar215 ninjette.org member Name: James Location: Aromas Join Date: May 2010 Motorcycle(s): 2005 Ninja EX250, 2005 SV650S Posts: 34	I have an 2005 with the same clacking issue but not the sputtering at all but it does idle a little rough. any help on this? Do i need to adjust the valves?