sputter at highmid/high rpm?

focus101 · September 19th, 2013, 10:53 AM

whats up guys, i finally rode my bike to work yesterday (the first real test drive since i installed the jet kit and pod 15miles) and on the way there and back i noticed when im cruising at 70 holding the throttle 3/4 (i think around 8-9000 rpm) the bike is kind of bumpie almost like its a missfire or running out of fuel (full tank) and when i WOT its fine no sputter but it slow a pick up though, anything pass 6500 rpm at 3/4 throttle it acts like that. any suggestions?

btw when its at operating temp its acts like this..

and also the idle is just slightly moving around and i blip the throttle it hangs for a quick sec and drop right back to the set idle, im assuming that the mixture screws?

some more carb tuning got to be done i guess..

focus101 · September 19th, 2013, 06:27 PM

Anyone??

csmith12 · September 19th, 2013, 07:46 PM

Pods.... jetting for pods sucks and not my strong point either but sounds lean.

What size jets did you install?
What brand of pods? K&N?
How many turns out currently on the mixture screw?

Also, I think I seen some pod jetting info here.

quarterliter · September 19th, 2013, 07:47 PM

I'd start at 2.5 to 2.75 turns out on the mixture screws. Raise the needle 1 clip. What main are you running?

focus101 · September 19th, 2013, 10:55 PM

Quote:

Originally Posted by csmith12

Pods.... jetting for pods sucks and not my strong point either but sounds lean.

What size jets did you install?
What brand of pods? K&N?
How many turns out currently on the mixture screw?

Also, I think I seen some pod jetting info here.

Main jet I'm running is a 110
Needle is 4spots from the top
K&n pod
And haven't touched the mixture screws yet, but the last owner drilled out the epa caps..

I'm going to see install the factory pro long boy Mixture screws then imma give them a turn..

focus101 · September 19th, 2013, 10:57 PM

Quote:

Originally Posted by quarterliter

I'd start at 2.5 to 2.75 turns out on the mixture screws. Raise the needle 1 clip. What main are you running?

I'm currently at 4 spots from the top at the needle I'm going to move the clip to the last slot and up a jet..

focus101 · September 19th, 2013, 11:02 PM

Or before I move the needle clip position again I'll change the main jet first..

jkv45 · September 20th, 2013, 06:11 AM

If it's pulling cleanly at WOT the main is right.

Your issue is in the part-throttle area that's controlled by the needle position.

Lower the clip to raise the needle and richen the mixture.

csmith12 · September 20th, 2013, 07:22 AM

Agree with Jay and Kevin, I think your closer than it seems, move the eclip first if WOT is good. 2.5 turns out on the mix.

agentbad · September 20th, 2013, 08:45 AM

Did you up your pilot jets to 40? I run 112 for mains and no shims.

focus101 · September 20th, 2013, 09:45 AM

Guys fixed the problem, it was the needle height Moved the e clip to the slot,and I installed the new factory pro mixture long screw, worth the money and easy get to, and idles nice, as of now my tuning is complete..

Thanks guy

csmith12 · September 20th, 2013, 09:48 AM

focus101 · September 20th, 2013, 09:58 AM

The adjustment woke the bike up a lot..

jkv45 · September 20th, 2013, 11:24 AM

Good deal - glad it's running well.

Checked out those Factory Pro idle mixture screws (http://www.factorypro.com/prod_pages/prodk04.html) - great idea, but $40 + $12 shipping is crazy...

September 19th, 2013, 10:53 AM	#1
focus101 ninjette.org member Name: shawn Location: nj Join Date: May 2013 Motorcycle(s): 96 250 Posts: 65	sputter at highmid/high rpm? whats up guys, i finally rode my bike to work yesterday (the first real test drive since i installed the jet kit and pod 15miles) and on the way there and back i noticed when im cruising at 70 holding the throttle 3/4 (i think around 8-9000 rpm) the bike is kind of bumpie almost like its a missfire or running out of fuel (full tank) and when i WOT its fine no sputter but it slow a pick up though, anything pass 6500 rpm at 3/4 throttle it acts like that. any suggestions? btw when its at operating temp its acts like this.. and also the idle is just slightly moving around and i blip the throttle it hangs for a quick sec and drop right back to the set idle, im assuming that the mixture screws? some more carb tuning got to be done i guess..

September 19th, 2013, 07:46 PM	#3
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	Pods.... jetting for pods sucks and not my strong point either but sounds lean. What size jets did you install? What brand of pods? K&N? How many turns out currently on the mixture screw? Also, I think I seen some pod jetting info here. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

September 20th, 2013, 07:22 AM	#9
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	Agree with Jay and Kevin, I think your closer than it seems, move the eclip first if WOT is good. 2.5 turns out on the mix. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

September 20th, 2013, 09:48 AM	#12
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	__________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

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September 19th, 2013, 06:27 PM	#2
focus101 ninjette.org member Name: shawn Location: nj Join Date: May 2013 Motorcycle(s): 96 250 Posts: 65	Anyone??

September 19th, 2013, 07:47 PM	#4
quarterliter ninjette.org guru Name: Kevin Location: Madison Join Date: Apr 2013 Motorcycle(s): 2004 Ninja 250 Posts: 465	I'd start at 2.5 to 2.75 turns out on the mixture screws. Raise the needle 1 clip. What main are you running?

September 19th, 2013, 11:02 PM	#7
focus101 ninjette.org member Name: shawn Location: nj Join Date: May 2013 Motorcycle(s): 96 250 Posts: 65	Or before I move the needle clip position again I'll change the main jet first..

September 20th, 2013, 06:11 AM	#8
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	If it's pulling cleanly at WOT the main is right. Your issue is in the part-throttle area that's controlled by the needle position. Lower the clip to raise the needle and richen the mixture.

September 20th, 2013, 08:45 AM	#10
agentbad ninjette.org sage Name: bob Location: Earf Join Date: Apr 2013 Motorcycle(s): 2005 Ninja 250, 2006 SV650N Posts: 642	Did you up your pilot jets to 40? I run 112 for mains and no shims.

September 20th, 2013, 09:45 AM	#11
focus101 ninjette.org member Name: shawn Location: nj Join Date: May 2013 Motorcycle(s): 96 250 Posts: 65	Guys fixed the problem, it was the needle height Moved the e clip to the slot,and I installed the new factory pro mixture long screw, worth the money and easy get to, and idles nice, as of now my tuning is complete.. Thanks guy

September 20th, 2013, 09:58 AM	#13
focus101 ninjette.org member Name: shawn Location: nj Join Date: May 2013 Motorcycle(s): 96 250 Posts: 65	The adjustment woke the bike up a lot..

September 20th, 2013, 11:24 AM	#14
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	Good deal - glad it's running well. Checked out those Factory Pro idle mixture screws (http://www.factorypro.com/prod_pages/prodk04.html) - great idea, but $40 + $12 shipping is crazy...