Changed the jets....but..... - SV650.org

04-04-06, 03:21 PM

...when i look down the front Carb with the engine running, fuel looks like its pouring out the main jet (passing the needle) but not on the back carb

They're 150 jets, de-snorkled filter, ignition advancer, micron full system, stage 1 cams

Should i be worried, it seems to be running fine

TSM · 04-04-06, 03:26 PM

Is the needle secure on the slider, could the retaining clip come loose?

04-04-06, 04:22 PM

Quote:

Originally Posted by TSM

Is the needle secure on the slider, could the retaining clip come loose?

Checked that, cleaned all the jets too

04-04-06, 04:31 PM

Are the carbs balanced, if the front is leading then it may well cause the needle to come of its seat.
Are both needles at the same height?
are the diaphragms and springs ok and the same ie not unequal.

04-04-06, 06:42 PM

Quote:

Originally Posted by John Burt

Are the carbs balanced, if the front is leading then it may well cause the needle to come of its seat.
Are both needles at the same height?
are the diaphragms and springs ok and the same ie not unequal.

Both needles are at the same height, diaphragms and springs are OK

Will balance the carbs and see what that does

northwind · 04-04-06, 11:44 PM

Most importantly, does it go?

05-04-06, 02:07 PM

Quote:

Originally Posted by northwind

Most importantly, does it go?

OH YES

TSM · 05-04-06, 02:20 PM

Side Question.
Does it run a tad lumpy at idle?
Ive got DJ150s in mine & i think the needles are 1 clip up which may be the problem. If i give it a big hand of throtle it chokes a bit then goes, saying that its been standing for a while..

northwind · 05-04-06, 02:20 PM

Well then. Don't try and diagnose a problem that doesn't exist

05-04-06, 03:28 PM

Presuming the main jets are the same, then main air jet and emulsion tube are things to have a look at. A combination of these begin to ‘atomise’ the fuel such that when it enters the venturi (at the orifice you have made these observations) it isn’t still in large droplet form.

The emulsion tube is the bit the main jet screws into, I would have to look at the manual to say where the main air jet is on the SV’s carbs, but you can look that up yaseln

04-04-06, 03:21 PM	#1
svrash Guest Posts: n/a	Changed the jets....but..... ...when i look down the front Carb with the engine running, fuel looks like its pouring out the main jet (passing the needle) but not on the back carb They're 150 jets, de-snorkled filter, ignition advancer, micron full system, stage 1 cams Should i be worried, it seems to be running fine

04-04-06, 03:26 PM	#2
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Is the needle secure on the slider, could the retaining clip come loose? __________________ 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

04-04-06, 11:44 PM	#6
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	Most importantly, does it go? __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

05-04-06, 02:20 PM	#8
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Side Question. Does it run a tad lumpy at idle? Ive got DJ150s in mine & i think the needles are 1 clip up which may be the problem. If i give it a big hand of throtle it chokes a bit then goes, saying that its been standing for a while.. __________________ 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

05-04-06, 02:20 PM	#9
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	Well then. Don't try and diagnose a problem that doesn't exist __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

04-04-06, 04:31 PM	#4
John Burt Guest Posts: n/a	Are the carbs balanced, if the front is leading then it may well cause the needle to come of its seat. Are both needles at the same height? are the diaphragms and springs ok and the same ie not unequal.

05-04-06, 03:28 PM	#10
Blue_SV650S Guest Posts: n/a	Presuming the main jets are the same, then main air jet and emulsion tube are things to have a look at. A combination of these begin to ‘atomise’ the fuel such that when it enters the venturi (at the orifice you have made these observations) it isn’t still in large droplet form. The emulsion tube is the bit the main jet screws into, I would have to look at the manual to say where the main air jet is on the SV’s carbs, but you can look that up yaseln

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