Fuel mix screws - SV650.org

TSM · 10-09-05, 03:31 PM

As the dynojet kit says, you should adjust the mixture screws on the SV, well i have tried. Seems like it has been touched before as the screw is damaged, i tried to turn it but it will not budge. How can i sort this out, is it because the screw is rubish brass and has deformed.

PS. what is the standard jetting on the SV, mine had 137.5 in there

21QUEST · 10-09-05, 04:40 PM

You've got to drill them out.

Cheers
Ben

TSM · 10-09-05, 04:43 PM

Has anyone done this here, whats the best way.? Best to use a hand drill i guess.

10-09-05, 04:45 PM

Quote:

Originally Posted by TSM

Has anyone done this here?

I haven't and I certainly wouldn't suggest doing it on my pc monitor, try holding it in a vice instead! :P

21QUEST · 10-09-05, 04:54 PM

Quote:

Originally Posted by Itching 2 go

Quote:

Originally Posted by TSM

Has anyone done this here?

I haven't and I certainly wouldn't suggest doing it on my pc monitor, try holding it in a vice instead! :P

Yep done it. You have to really careful. Start with the smallest drill bit(as tiny and go slowly and keep an eye on the dept.

Use a hand held vacumm cleaner to suck up the brass shavings as you go along.

Cheers
Ben

northwind · 10-09-05, 08:27 PM

And then after you've *****d it up, SV carbs are pretty cheap

21QUEST · 10-09-05, 10:05 PM

Quote:

Originally Posted by northwind

And then after you've *****d it up, SV carbs are pretty cheap

Cheers
Ben

10-09-05, 10:31 PM

Wrap some tape around the drill bit about 3mm down and you won't drill any deeper then where the tape is ***super tip***

10-09-05, 11:44 PM

Might want to try WD-40/RP7 or whatever you guys have for loosening threads before drilling away. The air screws shouldn't be that hard to move, unless someone has set them at the std 2 1/2 turns out and used threadlock (completely unnecessary).

Yes, 137.5 Mikuni mains are std from the factory too.

Sid Squid · 10-09-05, 11:52 PM

Since when was brass rubbish?

It's an entirely appropriate material for jets, mixture screws etc.

10-09-05, 03:31 PM	#1
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Fuel mix screws As the dynojet kit says, you should adjust the mixture screws on the SV, well i have tried. Seems like it has been touched before as the screw is damaged, i tried to turn it but it will not budge. How can i sort this out, is it because the screw is rubish brass and has deformed. PS. what is the standard jetting on the SV, mine had 137.5 in there __________________ 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

10-09-05, 04:43 PM	#3
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Has anyone done this here, whats the best way.? Best to use a hand drill i guess. __________________ 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

10-09-05, 08:27 PM	#6
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	And then after you've *****d it up, SV carbs are pretty cheap __________________ "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"

10-09-05, 11:52 PM	#10
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Since when was brass rubbish? It's an entirely appropriate material for jets, mixture screws etc. __________________ 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"

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10-09-05, 10:31 PM	#8
svrash Guest Posts: n/a	Wrap some tape around the drill bit about 3mm down and you won't drill any deeper then where the tape is *super tip*

10-09-05, 11:44 PM	#9
PeterM Guest Posts: n/a	Might want to try WD-40/RP7 or whatever you guys have for loosening threads before drilling away. The air screws shouldn't be that hard to move, unless someone has set them at the std 2 1/2 turns out and used threadlock (completely unnecessary). Yes, 137.5 Mikuni mains are std from the factory too.