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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Carb jetting opinions /cgi-bin/YaBB.pl?num=1272157759 Message started by einheit13 on 04/24/10 at 18:09:18 |
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Title: Carb jetting opinions Post by einheit13 on 04/24/10 at 18:09:18 Ok, first of all, thanks Lancer-you're the man! I wish you sold the same kinda kits for HDs CV carbs! Anyway, 08 S 40. All stock save for an open 1 3/4" fishtail pipe. Where should I start with jetting?? I'm in Hampton, Va. Elevation, roughly 10'+ above sea level. I did make a baffle for the pipe, to give some of the bottom end back, I may make a tighter one though. I'm felling like maybe the 155 main and 55 pilot?? I don't know how much air flow the factory box/filter hinders, but with an open pipe I know its running lean. I've got the mix out 3.5 turns and she pops like crazy on decel... What do you 'experienced' guys think about this?? Should I start lower and use the shims from the kit?? |
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Title: Re: Carb jetting opinions Post by LANCER on 04/25/10 at 14:44:50 If you have the screw out to 3.5 turns then you need a bigger pilot jet. you should not go beyond 3 turns out lest you loose the screw from being too loose once the screw gets to 2 turns out you should consider the next larger pilot jet. Be sure to file the white spacer on the needle by 1/2 or replace with 3 washers for a richer midrange. You can certainly try the 155 main jet and see how it runs.. If it has good power at wide open throttle without hesitation or stumblng then you are good to go,but if it stumbles then go down to 152.5 and test at w/o throttle again. your location will not affect your jetting much at all in your instance |
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Title: Re: Carb jetting opinions Post by LANCER on 04/25/10 at 16:54:50 070B0C0A070B165351620 wrote:
Actually, I do have a kit for an HD CV carb. i had a sporty until a yr or 2 ago. It has: -replacement slide spring -carb top gasket -42 &44 pilot jets -170 & 175 main jets -rreplacement needle -rep. needle jet -drill bit 7/64 -2 sml worm clamps -4 ss allen head screws for top w/ allen wrench -EZ-Just idle mixture needle plus several pages of instructions It cost me about $100 Every thing is new and still packed as I received it. Sold the bike before I got a chance to insall it If you can use it and want it then say $55 incl shp. Send a PM if you are interested in it. |
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Title: Re: Carb jetting opinions Post by einheit13 on 04/25/10 at 18:38:07 373A35383E29696C5B0 wrote:
Actually, I do have a kit for an HD CV carb. i had a sporty until a yr or 2 ago. It has: -replacement slide spring -carb top gasket -42 &44 pilot jets -170 & 175 main jets -rreplacement needle -rep. needle jet -drill bit 7/64 -2 sml worm clamps -4 ss allen head screws for top w/ allen wrench -EZ-Just idle mixture needle plus several pages of instructions It cost me about $100 Every thing is new and still packed as I received it. Sold the bike before I got a chance to insall it If you can use it and want it then say $55 incl shp. Send a PM if you are interested in it.[/quote] I may know someone whom will ned it, but its too small for my 98 1200C. I'm at a 48 pilot, 180 main. Still a tad lean. I have yet to mess with the slide, still learning about CV carbies! |
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Title: Re: Carb jetting opinions Post by LANCER on 04/26/10 at 01:51:04 drilling (with the drill bit provided) the holes in the bottom of the slide slightly larger allows the slide to move a little more briskly and improves throttle response all the parts, other than the pilot and main jet sizes will work on any of the CV series carbs. the EZ-just screw which was lilke $20+ by it self I think, replaces the factory screw and you no longer need a screw driver to adjust it. It has a knurled knob that stick out so you can just reach under the carb and turn it at any time if it needs fine tuning...very handy. anyway, if you find someone let me know please. |
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