stutter on steady throttle FI - SV650.org

20-02-09, 08:29 PM

HI all got a k8 when cold runs fine when warm at steady throttle at 3500 revs bike seems 2 stutter as you increase revs it smooths out any 1 any ideas been back 2 dealer 5 times they say its normal yeah right

21-02-09, 06:30 AM

I would check the throttle position sensor is set correctly as 3500rpm was the engine speed that my bike ecu changed its fuel map, i believe it is meant to change at approx 1500ish rpm. Use the search facility to find the THROTTLE POSITION SENSOR set up thread. I carried out the mod and made a massive difference. The TPS may not be what is causing your problem but the general consensus of all who have done it is that it makes a big difference.

Bluepete · 21-02-09, 07:37 AM

I'll second that Gazza. MIne stuttered around 3.5k, but the TPS mod sorted it right out. Makes town riding sooooo much easier!

21-02-09, 09:14 AM

mine's done that for the 3months ive owned it, thought it was normal, definatly going to get it sorted this morning.

i'll let you knw mike if it sorts it out

21-02-09, 02:10 PM

thanks for yr help guys may have a go later on k8 there is 2 take it i need too adjust rear one

Sid Squid · 21-02-09, 02:43 PM

Adjusting the TPS alone is pointless, check the throttle balance first.

On all FI bikes there are two TPS, the primary is the lower one.

21-02-09, 05:25 PM

hey mike, ive just done mine, made loads of difference,
also i had my throttles balanced at 11k service only 2weeks ago.

22-02-09, 05:37 PM

Glad you sorted yrs DP did mine didn,t make any difference. its ok when cold prob starts when hot

22-02-09, 10:15 PM

try getting your throttle bodies balanced and also if there are any mods to the fuel or ignitoin system (like a TRE) try running them without it as i took my TRE orr mainly cuz it doesnt make much difference and because even the 'smart' TRE's make them run like a bag of poop at times

20-02-09, 08:29 PM	#1
mikey devon Guest Posts: n/a	stutter on steady throttle FI HI all got a k8 when cold runs fine when warm at steady throttle at 3500 revs bike seems 2 stutter as you increase revs it smooths out any 1 any ideas been back 2 dealer 5 times they say its normal yeah right

21-02-09, 06:30 AM	#2
gazza Guest Posts: n/a	Re: stutter on steady throttle FI I would check the throttle position sensor is set correctly as 3500rpm was the engine speed that my bike ecu changed its fuel map, i believe it is meant to change at approx 1500ish rpm. Use the search facility to find the THROTTLE POSITION SENSOR set up thread. I carried out the mod and made a massive difference. The TPS may not be what is causing your problem but the general consensus of all who have done it is that it makes a big difference.

21-02-09, 07:37 AM	#3
Bluepete Member Mega Poster Join Date: Sep 2005 Location: Ex motorcyclist Posts: 1,961	Re: stutter on steady throttle FI I'll second that Gazza. MIne stuttered around 3.5k, but the TPS mod sorted it right out. Makes town riding sooooo much easier! __________________ https://www.facebook.com/pete.philli...04?ref=tn_tnmn

21-02-09, 09:14 AM	#4
dual-power sv Guest Posts: n/a	Re: stutter on steady throttle FI mine's done that for the 3months ive owned it, thought it was normal, definatly going to get it sorted this morning. i'll let you knw mike if it sorts it out

21-02-09, 02:10 PM	#5
mikey devon Guest Posts: n/a	Re: stutter on steady throttle FI thanks for yr help guys may have a go later on k8 there is 2 take it i need too adjust rear one

21-02-09, 02:43 PM	#6
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: stutter on steady throttle FI Adjusting the TPS alone is pointless, check the throttle balance first. On all FI bikes there are two TPS, the primary is the lower one. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

21-02-09, 05:25 PM	#7
dual-power sv Guest Posts: n/a	Re: stutter on steady throttle FI hey mike, ive just done mine, made loads of difference, also i had my throttles balanced at 11k service only 2weeks ago.

22-02-09, 05:37 PM	#8
mikey devon Guest Posts: n/a	Re: stutter on steady throttle FI Glad you sorted yrs DP did mine didn,t make any difference. its ok when cold prob starts when hot

22-02-09, 10:15 PM	#9
dual-power sv Guest Posts: n/a	Re: stutter on steady throttle FI try getting your throttle bodies balanced and also if there are any mods to the fuel or ignitoin system (like a TRE) try running them without it as i took my TRE orr mainly cuz it doesnt make much difference and because even the 'smart' TRE's make them run like a bag of poop at times

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