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Savage13

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Help!
04/16/08 at 10:38:57

I just installed Lancers high-perf carb kit and i'm amazed at the difference; my baby is a darn monster lol. My only consern is when it's at idle if i give the throttle a quick twist she nearly dies before revving, if i ease into it she's fine but a fast takeoff may be nearly impossible. The carb came set with a #20 pilot jet and a #190 main, i haven't tried to change them yet (i'm not mechanically inclined) but the kit came with a 17.5 and a 22.5 pilot and mains from 165-230. I'm running a K@N in the factory location and a 4 disk Supertrapp exhaust, anyone with a similar setup know the best jet combo to cut backfires, shotgun pops, and my annoying stall from idle?

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 29042 L.A. California Gender:	Re: Help! Reply #1 - 04/16/08 at 11:17:24 If you were inclined enough to install it, you surely are inclined enough to change a couple of jets. Maybe you need help with under standing whats going on? Check out the manual that came with the carb, and in the tech sect for carb tuning.
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rpgpgmr

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Re: Help!
Reply #2 - 04/16/08 at 11:19:38

You are talking about a Savage, right? Those jets are way different numbers. I bought Lancer's jet kit too and mine came with:

main jets: 150, 152.5, 155
pilot jet: 55

I changed mine out to the 155 main and 55 pilot. Have you done the white spacer mod yet? That usually takes care of the backfire (most of it anyway). When you re-jet you will have to adjust your idle mixture as well.

Raising the idle speed may help with the hesistation too.

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2005 Suzuki Boulevard S40
2007 Yamaha V-Star Classic

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Savage13

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Re: Help!
Reply #3 - 04/16/08 at 11:31:58

To clarify, i purchased the entire carb not just a jet kit; that's why jet sizes are so different i assume. And Ver you are correct, i did install it by myself and have within the last 30 minutes changed the main jets successfully; i'm just not understanding what's happening. I assume that since it's occurring from dead idle it's the pilot jet causing the problem, but i'm not sure weather to increase the size or decrease it. I can go up or down one size, only problem is theres no opening to change the pilot like there is for the main :'( will i have to remove the bowl from the base of the carb to reach it? I'm definately no expert but the stall feels alot like flooding, so i'm gonna try the lower size first unless someone can advise otherwise. I get my lisence back in just over 2 weeks so i'm desperate to have her running at 100% by then.

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Latimer Junior Member Offline I love YaBB 1G - SP1! Posts: 81 Boston Gender:	Re: Help! Reply #4 - 04/16/08 at 11:40:37 Can you fiddle with the idle mixture to see if it has different results? Im completely unfamiliar with that carb you are talking about, but I know my stock one acted like you just described after rejetting until I adjusted the idle mixture screw.
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rpgpgmr Senior Member Offline Posts: 270 Huntington, WV Gender:	Re: Help! Reply #5 - 04/16/08 at 12:47:27 Mine too.
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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Help! Reply #6 - 04/16/08 at 13:02:58 Savage13 wrote on 04/16/08 at 10:38:57: and a 4 disk Supertrapp exhaust, you really only have 4 disks on that supertrapp?
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Help! Reply #7 - 04/17/08 at 00:22:17 If so, that's tighter than the stock exhaust, I think. Thats a pretty narrow space bewtween those disks, unless someone put spacers between the disks.
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T Mack 1 - FSO

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Re: Help!
Reply #8 - 04/17/08 at 03:05:11

May not be a jet issue. Remember what going on. There's 3 fuel deliver circuits. Low , mid and high. Low is the idle/air mix screw. Mid is controlled by the needle position on the slide and high the main jet.

On Lancer's carb, when you "hit" the gas, you get into the mid or high circuits quickly. No vacuum control on the slide. But, if the mid is set too lean or too rich, the bike can go "blah".

Check with Lancer , but there is a possibility that you will have to play with the needle position, raising to richen, lowering to lean it.

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Engineers design things, Technicians make them work.
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30% of being mechanical is confidence/30% is knowing to go slow when needed/30% is looking repeatedly at what you have/10% is dumb luck Wink

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Savage13

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Re: Help!
Reply #9 - 04/17/08 at 11:20:19

Thanks for the advice so far. I've changed the pilot to the 17.5, went to the 165 main and set the needle clip to the top or leanest position; and still have some of the stall but not as badly. I noticed it was better after moving the needle position for the midrange power but i'm at the top and can't go any leaner, can i change that needle for an even leaner condition or is it something i have to live with?

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Reelthing

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Re: Help!
Reply #10 - 04/17/08 at 11:30:55

As the needle lifts it pulls fuel through the mainjet until it is all the way up and the mainjet is wide open - could drop the mainjet a little more

But do you really only have 4 disks in the supertrap?

you have a lot of intake going on there for quite a restrictive exhaust - a 'trap at 4 disks is likely to flow less exhaust than a stock muffler

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Savage13 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 23	Re: Help! Reply #11 - 04/17/08 at 11:39:25 Actually i had a 19" turnout from jcwhitney that sounded like a Harley jacked up on coke, but it had tyhe same stall problem, the Trapp only had 4 disks (on bike when i bought it) but with the endcap removed she seems to move plenty of air
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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Help! Reply #12 - 04/17/08 at 11:44:28 oh their loud with the cap off! - sounds cool when you let off of it from higher rpms too - if you slip the stock filter back in the air box does it bog more or less when you crack it open?
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Savage13 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 23	Re: Help! Reply #13 - 04/21/08 at 10:55:47 Made a little progress, with the 165 main jet i still have the hesitation but it's very very minimal. I just ordered jets sizes 150-155-160 hopefully the 160 will take it where i want. If not i'll go to the lower ones, but even then i think the carb was very well worth the money. I'll post an update to my crisis (lol) as soon as i have a result.
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