can't rev over 5K RPM

cuz · October 28th, 2011, 08:12 AM

ok so i was in the proses of syncing my carbs and when i was warming up the bike around the block i cant pass over 5

i ordered a leo slip on has not arrived yet

but i dont think just cuz i have the oem on will stop me from revving over 5 i have 0990 k&n
drilled slides
crankcase breather
112.5 main jets
3 3mm washers under each needle
idk do i need bigger jets? idono pls help

csmith12 · October 28th, 2011, 08:41 AM

i thought the needle shims were 4mm washers, maybe that could be the issue

Honko · October 28th, 2011, 09:29 AM

Newp, the 3 mm are the correct size for shimming.

cuz · October 28th, 2011, 09:40 AM

more washers yea naw?

cuz · October 28th, 2011, 10:22 AM

idk if it helps but the bike just finished a whole water bottle filled w/gas

choneofakind · October 28th, 2011, 10:42 AM

Is the bike too rich? 112.5 mains seem big for use with an oem exhaust from what I can tell. Check out the jetting database for a point of reference:

http://www.ninjette.org/forums/showt...tting+database

1LoneWolf · October 28th, 2011, 10:44 AM

112.5 main jets are pretty big, do you have the snorkel in? What kind of air filter, stock? Usually if you can't rev up high, it means you're running lean. But with 112.5 main jets and 3 washers under the needles, that seems unlikely. If anything, you're probably running way too rich. Try removing the snorkel if you haven't already, and report back. If it's revving better, then you're probably running too rich. In that case, you should try removing a washer from each needle.

PS: 3 washers is a little too much with a stock exhaust, people who put 3 washers under the needles usually have removed the airbox and installed pod filters or something like that (in addition to rejetting). I tried shimming my needles once, and put 2 washers under each needle, and my bike ran like garbage. This was because I had already rejetted the carbs.

cuz · October 28th, 2011, 10:53 AM

the airbox is delete i guess i wait till the slip on get here

cuz · October 28th, 2011, 11:04 AM

for a second it started to puff out black smoke not a lot but enough to get me scared

NathanUc · October 28th, 2011, 11:11 AM

Quote:

Originally Posted by cuz

for a second it started to puff out black smoke not a lot but enough to get me scared

Black smoke means rich I believe so others thoughts were probably right.

Do you have a 110main to try? If you went through all the trouble of removing the air box, you might as well buy a full system exhaust honestly.

cuz · October 28th, 2011, 11:23 AM

im hopeing that w/the slip on it will all work ill just turn it off till it gets here thanks guys

1LoneWolf · October 28th, 2011, 06:33 PM

Quote:

Originally Posted by cuz

im hopeing that w/the slip on it will all work ill just turn it off till it gets here thanks guys

I'd recommend a full system... not a slip on. A slip on is basically just a muffler attached to the stock midpipe. The headers are stock. You would want a full system, like an Area P or Yoshimura, or a Leo Vince. The diameter of the pipes are larger, allowing more exhaust gasses to flow out. A slip on won't do much for you.

cuz · October 28th, 2011, 07:02 PM

the leo slip on is on its way as we type lol ill update after i install it

cuz · November 3rd, 2011, 07:58 PM

mna i still cant pass 5 even w/the slip on should i go down on the main jet or less on the washers?

NathanUc · November 3rd, 2011, 08:01 PM

Yeah, go down to 110 and see how it runs (if you have it). As others have said, slip ons don't do a hole lot in terms of changing air/fuel mixture. A lot of people are running 112.5 mains on bikes with full systems and getting proper mixtures so it's more than likely way too rich for stock headers.

If you have to order some, maybe get a variety in the range of 98-110 to save on shipping costs just in case.

94fiveohvert · November 3rd, 2011, 08:28 PM

i would go smaller jet, and possibly 2 washers instead of 3.

cuz · November 3rd, 2011, 09:09 PM

allright txs ill try tomato

wayanlam · November 3rd, 2011, 11:20 PM

112.5 mains are really big while still sporting the stock exhaust, im running 110 mains, 40 pilots, and i think 3rd notch on the needle, and i have a full exhaust, K&N pod filter, Ported intake and exhaust ports, and bored up to 265cc.

if adjusting the shimms does not help, definitely go down to 108 while you still have the stock exhaust.

October 28th, 2011, 08:12 AM	#1
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	can't rev over 5K RPM ok so i was in the proses of syncing my carbs and when i was warming up the bike around the block i cant pass over 5 i ordered a leo slip on has not arrived yet but i dont think just cuz i have the oem on will stop me from revving over 5 i have 0990 k&n drilled slides crankcase breather 112.5 main jets 3 3mm washers under each needle idk do i need bigger jets? idono pls help __________________________________________________ THE GOOD LIFE

October 28th, 2011, 08:41 AM	#2
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	i thought the needle shims were 4mm washers, maybe that could be the issue __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

October 28th, 2011, 09:40 AM	#4
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	more washers yea naw? __________________________________________________ THE GOOD LIFE

October 28th, 2011, 10:22 AM	#5
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	idk if it helps but the bike just finished a whole water bottle filled w/gas __________________________________________________ THE GOOD LIFE

October 28th, 2011, 10:53 AM	#8
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	the airbox is delete i guess i wait till the slip on get here __________________________________________________ THE GOOD LIFE

October 28th, 2011, 09:29 AM	#3
Honko ninjette.org sage Name: Hyon Location: Northern Virginia Join Date: Jun 2011 Motorcycle(s): 2010 Green SE Posts: 574	Newp, the 3 mm are the correct size for shimming.

October 28th, 2011, 10:42 AM	#6
choneofakind ninjette.org certified postwhore Name: . Location: . Join Date: Feb 2011 Motorcycle(s): . Posts: Too much. MOTM - Feb '13, Feb '14	Is the bike too rich? 112.5 mains seem big for use with an oem exhaust from what I can tell. Check out the jetting database for a point of reference: http://www.ninjette.org/forums/showt...tting+database

October 28th, 2011, 10:44 AM	#7
1LoneWolf ninjette.org member Name: R. Location: San Francisco, CA Join Date: Jul 2011 Motorcycle(s): 2009 Ninja 250R Posts: 86	112.5 main jets are pretty big, do you have the snorkel in? What kind of air filter, stock? Usually if you can't rev up high, it means you're running lean. But with 112.5 main jets and 3 washers under the needles, that seems unlikely. If anything, you're probably running way too rich. Try removing the snorkel if you haven't already, and report back. If it's revving better, then you're probably running too rich. In that case, you should try removing a washer from each needle. PS: 3 washers is a little too much with a stock exhaust, people who put 3 washers under the needles usually have removed the airbox and installed pod filters or something like that (in addition to rejetting). I tried shimming my needles once, and put 2 washers under each needle, and my bike ran like garbage. This was because I had already rejetted the carbs.

October 28th, 2011, 11:04 AM	#9
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	for a second it started to puff out black smoke not a lot but enough to get me scared __________________________________________________ THE GOOD LIFE

October 28th, 2011, 11:23 AM	#11
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	im hopeing that w/the slip on it will all work ill just turn it off till it gets here thanks guys __________________________________________________ THE GOOD LIFE

October 28th, 2011, 07:02 PM	#13
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	the leo slip on is on its way as we type lol ill update after i install it __________________________________________________ THE GOOD LIFE

November 3rd, 2011, 07:58 PM	#14
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	mna i still cant pass 5 even w/the slip on should i go down on the main jet or less on the washers? __________________________________________________ THE GOOD LIFE

November 3rd, 2011, 08:01 PM	#15
NathanUc B-Town Ninja Name: Nathan Location: Bloomington, IN Join Date: Feb 2011 Motorcycle(s): Black 2013 Ninja ZX6R ABS Posts: 609 Blog Entries: 3	Yeah, go down to 110 and see how it runs (if you have it). As others have said, slip ons don't do a hole lot in terms of changing air/fuel mixture. A lot of people are running 112.5 mains on bikes with full systems and getting proper mixtures so it's more than likely way too rich for stock headers. If you have to order some, maybe get a variety in the range of 98-110 to save on shipping costs just in case. __________________________________________________ Downgraded to a 2013 636. Previous owner of a 2010 250r --------------------------------- My moto-vlog YouTube channel http://www.youtube.com/bloomingtonninja

November 3rd, 2011, 08:28 PM	#16
94fiveohvert ninjette.org member Name: United States Location: oklahoma city, ok Join Date: Oct 2011 Motorcycle(s): ninja 250r, crf 50 Posts: 120	i would go smaller jet, and possibly 2 washers instead of 3.

November 3rd, 2011, 09:09 PM	#17
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	allright txs ill try tomato __________________________________________________ THE GOOD LIFE

November 3rd, 2011, 11:20 PM	#18
wayanlam ninjette.org certified postwhore Name: Wayan Location: Bali - Indonesia Join Date: Apr 2009 Motorcycle(s): 2014 Z250 Posts: A lot.	112.5 mains are really big while still sporting the stock exhaust, im running 110 mains, 40 pilots, and i think 3rd notch on the needle, and i have a full exhaust, K&N pod filter, Ported intake and exhaust ports, and bored up to 265cc. if adjusting the shimms does not help, definitely go down to 108 while you still have the stock exhaust. __________________________________________________ Kawasaki Z250, Bored up to 300cc with 12.8 CR, 41hp at wheel 27nm torque, Two bros full exhaust with DB killer Dynojet Power Commander V, KnN Open filter, intake and exhaust ported, Puig Windshield

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