SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000 Need Help: Try Searching before posting |
|
Thread Tools |
18-01-09, 03:20 PM | #1 |
Guest
Posts: n/a
|
Pilot screw adjustment.
Right, had a bit of a hassle getting one of the pilot screws out of the carbs as the head had got shagged (seems a common problem with the screws in the carbs) its been running rich for ages, and havent got around to buying new carbs as the screw was jammed, but recently it has really started to loose power. wont even lift the front wheel when throtteling it in 1st gear! i think ive been running it rich for too long, and buggered the piston rings but will check that later...first things first get teh carbs sorted. Started cleaning the carbs but need to know how many turns out (from completely tightened) for the standard setting, then i can work from there and set it to my requirements.
cheers |
18-01-09, 04:47 PM | #2 |
Guest
Posts: n/a
|
Re: Pilot screw adjustment.
About 2-1/2
But theyre idle screws and only effext the idle circuit and initial throttle opening, check the choke cables and plungers as its the most common issue on an sv |
18-01-09, 06:13 PM | #3 |
Guest
Posts: n/a
|
Re: Pilot screw adjustment.
well those screws are well and trully fudged, but that hasnt really been a problem. like i said, its been running lean for ages, but still pulls really really well, but recently, its lagged in power loads. so i just need to set everything to its initial settings, to eliminate things bit by bit, then figure out whats wrong. ill try to get the screws out after work tomorrow with a torx, but i really dont think they are budging!
|
29-05-16, 01:07 PM | #4 |
Member
Join Date: Feb 2009
Posts: 247
|
Re: Pilot screw adjustment.
I've just removed the pilot screw while cleaning the first carb for the first time. I hadn't realised you had to record the setting, until I read the manual properly after I had removed it. Lesson learned - read the instructions first!
So, my question is - am I correct that to reinstall you tighten the screw in all the way and then undo it approximately 2.5 turns? I'm going to pay attention to the next one and see what setting that was at and hope, hope, hope that the setting was the same.
__________________
2002 SV650S K2 + 2005 CBR125-R (my 2009 SV650S Dark Grey K9 was stolen in Hextable 18/7/12 ) |
29-05-16, 04:55 PM | #5 | |
Guest
Posts: n/a
|
Re: Pilot screw adjustment.
Quote:
|
|
29-05-16, 06:02 PM | #6 | |
Member
Join Date: Feb 2009
Posts: 247
|
Re: Pilot screw adjustment.
Quote:
__________________
2002 SV650S K2 + 2005 CBR125-R (my 2009 SV650S Dark Grey K9 was stolen in Hextable 18/7/12 ) |
|
29-05-16, 11:11 PM | #7 |
Guest
Posts: n/a
|
Re: Pilot screw adjustment.
Daveog, glad to help. syncronizing the carbs is a bit different, after you get the idle A/f sort individually you would hook up your vacuum lines to the sync tool and use the adjuster on the left side of the carb linkage to get them both pulling equal vacuum at idle. Then readjust your idle and bam, the front wheel will be in the air in no time. I just redid my sv650 and it runs way better than the stock carb tuning. The bike is stock aside from a desnorkled air cleaner and a staintune slip-on. I ran 145main jets, 17.5 pilot jets(all mikuni), two shims on the jet needles and tuned just as I explained. Good luck!
|
30-05-16, 09:12 AM | #8 |
Member
Join Date: Feb 2009
Posts: 247
|
Re: Pilot screw adjustment.
Thanks Marchetti - fingers crossed I can do it!
__________________
2002 SV650S K2 + 2005 CBR125-R (my 2009 SV650S Dark Grey K9 was stolen in Hextable 18/7/12 ) |
30-05-16, 12:12 PM | #9 |
Member
Mega Poster
Join Date: Jul 2008
Location: here as devil's advocate
Posts: 11,540
|
Re: Pilot screw adjustment.
or get yourself a gunson colortune. if you do remember to get the correct plug thread fitting.
|
31-05-16, 11:20 AM | #10 |
Member
Mega Poster
Join Date: Jul 2003
Location: Doncaster, oop norf
Posts: 2,122
|
Re: Pilot screw adjustment.
Dave just set it to stock settings (2.5 turns out from lightly seated), things have to be wildly wrong for you to need otherwise. I would take Marchetti's advice with a pinch of salt - what other mods has the bike got? That much upjetting all round really would be to suit a heavily-modified engine, and TBH I'd be looking for a good dyno operator do do that. FWIW our American cousins seem to run huge jets in their bikes, I don't know why.
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Pilot power vs pilot road | James SV | Tyres | 30 | 18-05-09 10:20 PM |
carb adjustment screw | SAMMY650 | SV Talk, Tuning & Tweaking | 5 | 26-10-07 08:30 PM |
Michelin Pilot sport vs Michelin pilot road | Dave The Rave | Bikes - Talk & Issues | 26 | 08-10-07 12:19 PM |
Pilot Power or Pilot Road? | mario | Tyres | 3 | 06-10-06 03:45 AM |
Michelin Pilot Sport or Pilot Power ? | mihaip | Tyres | 0 | 22-09-06 12:02 PM |