Bike running very "lumpy" when top speed is reache - SV650.org

02-05-06, 07:28 AM

This morning on my way to work, I tested the top speed again on the private road section...

Once the bike is flat out it starts to jump

It jumps b etween 120 & 130 mph. It's not just the speedo indicating, the engine sounds strange & I can feel the bike pulling/stopping/pulling/stopping.

What's the matter with it now

TSM · 02-05-06, 07:42 AM

Is it hitting the redline limiter? The SV should not be able to in 6th unless you are geared way diffrent.

pegasus · 02-05-06, 09:43 AM

your hitting the limit patrick watch your revs...as a matter of interest my k4 could hit its limit in 6th no problem

TSM · 02-05-06, 09:56 AM

Just read it again, it cant be the limiter unless the gearing is realy changed as at max revs you would be doing abt an indicated 135. Well on mine its like that and its geared +1 on the rear.

02-05-06, 09:57 AM

What is your jetting like?

Biker Biggles · 02-05-06, 10:56 AM

Sounds like what you are describing is your engine surging,which is more likely to be a fueling issue.Maybe a bit of fuel starvation at high revs?

02-05-06, 11:22 AM

No the revs are fine.
will have to look into getting it rejetted.

I just put a fuel cleaner into the fuel system - might that cause it ?

02-05-06, 12:28 PM

Been quoted £150 + VAT for a rejet

02-05-06, 07:40 PM

Not too bad I suppose. Cheaper to fit your own and not that hard to do.

03-05-06, 06:26 AM

Absolutely fine again this morning.

I "think" it must have been the fuel system cleaner getting rid of some build up gunk...

02-05-06, 07:28 AM	#1
SpankyHam Guest Posts: n/a	Bike running very "lumpy" when top speed is reache This morning on my way to work, I tested the top speed again on the private road section... Once the bike is flat out it starts to jump It jumps b etween 120 & 130 mph. It's not just the speedo indicating, the engine sounds strange & I can feel the bike pulling/stopping/pulling/stopping. What's the matter with it now

02-05-06, 07:42 AM	#2
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Is it hitting the redline limiter? The SV should not be able to in 6th unless you are geared way diffrent. __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

02-05-06, 09:43 AM	#3
pegasus Member Mega Poster Join Date: Aug 2004 Posts: 1,122	your hitting the limit patrick watch your revs...as a matter of interest my k4 could hit its limit in 6th no problem __________________ tune in, turn on, burn out

02-05-06, 09:56 AM	#4
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Just read it again, it cant be the limiter unless the gearing is realy changed as at max revs you would be doing abt an indicated 135. Well on mine its like that and its geared +1 on the rear. __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

02-05-06, 10:56 AM	#6
Biker Biggles Member Mega Poster Join Date: Jan 2005 Location: Barnet Herts Posts: 5,071	Sounds like what you are describing is your engine surging,which is more likely to be a fueling issue.Maybe a bit of fuel starvation at high revs? __________________ On a clear day we stand there and look further than the ordinary eye can see.

02-05-06, 09:57 AM	#5
Razor Guest Posts: n/a	What is your jetting like?

02-05-06, 11:22 AM	#7
SpankyHam Guest Posts: n/a	No the revs are fine. will have to look into getting it rejetted. I just put a fuel cleaner into the fuel system - might that cause it ?

02-05-06, 12:28 PM	#8
SpankyHam Guest Posts: n/a	Been quoted £150 + VAT for a rejet

02-05-06, 07:40 PM	#9
Razor Guest Posts: n/a	Not too bad I suppose. Cheaper to fit your own and not that hard to do.

03-05-06, 06:26 AM	#10
SpankyHam Guest Posts: n/a	Absolutely fine again this morning. I "think" it must have been the fuel system cleaner getting rid of some build up gunk...

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