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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Re-jeting my carb /cgi-bin/YaBB.pl?num=1176149344 Message started by Austin_man on 04/09/07 at 13:09:04 |
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Title: Re-jeting my carb Post by Austin_man on 04/09/07 at 13:09:04 I am trying to get more power out of my 97 Savage. Does anyone know what Jet I am to use for increaseing my power and maybe tork. I also heard that I need to remove the white spacer that is located inside the carb. Some people remove and others say to shave it in half. What seems to work better??? |
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Title: Re: Re-jeting my carb Post by Reelthing on 04/09/07 at 13:20:58 Welcome aboard. If you search through the posts you'll find very good howto's on doing the carb. Good place to start on building up the power is freer flow muffler and air filter (unless it's dusty than keep the stocker I think) and a carb rejet. Depending on what you do with the exhaust (Jardine HD SEII or such ) likely a 150 or 152.5 (are you in Austin Tx?) mainjet, 1/2 the white spacer, and turn out the idle mixture screw (after pulling the brass plug) about 2 turns out from a Soft seat. |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/09/07 at 13:31:01 I am in Austin. I have replace my pipe with a Harley Sportser Pipe. It sounds so much better now. I sounded like a Singer Sewing machine before. Thanks for the info. I will give it a shot. |
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Title: Re: Re-jeting my carb Post by vroom1776 on 04/09/07 at 14:07:34 who says a Singer sewing machien doesn't sound nice? I'm dying to get my hands on one! jetting, buy all the sizes around the one you think you need. Saves trips to the shop. |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/09/07 at 14:08:38 10/4.Thanks. |
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Title: Re: Re-jeting my carb Post by jd06s40 on 04/09/07 at 20:18:01 get a pilot jet |
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Title: Re: Re-jeting my carb Post by justin_o_guy on 04/10/07 at 08:24:34 You will need a better exhaust & jetting to get decent powwer out of this little bike. The 1/2 spacer seems to be the most recommended approach. |
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Title: Re: Re-jeting my carb Post by Savage_Rob on 04/10/07 at 09:37:31 Reelthing wrote:
justin_o_guy wrote:
I agree with both of the above. Also, I apologize for derailing the topic earlier. I've cleaned up the thread. |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/10/07 at 09:46:07 So I have the Harley sportster pipe, Shaving my spacer in half and rejeting with a 152.5 main. How about the pilot jet? |
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Title: Re: Re-jeting my carb Post by Savage_Rob on 04/10/07 at 09:51:51 Austin_man wrote:
Stick with the stock and use Lancer's Straight & Simple Carb Tuning procedure in the Tech Ref forum. Only upsize it if you are unable to adjust it far enough using the adjustment screw. |
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Title: Re: Re-jeting my carb Post by Greg_650 on 04/10/07 at 09:55:14 Austin_man wrote:
Nothing etched in stone with the HD pipe and the jet size. You might not need that large. Buy all 3 sizes above the stock 145 and be prepared to swap them until you're happy with it. Backfires aren't cool and neither is black soot. If you change the bowl screws to allen head the first time, it is easy to swap the main jet later without removing the carb. |
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Title: Re: Re-jeting my carb Post by Greg_650 on 04/10/07 at 10:02:49 Savage_Rob wrote:
Aw, don't be so hard on yourself. We forgive you :P I also agree with the 1/2 spacer approach. Save the original spacer and replace with an equivalent diameter washer (or 2) to get the job done. Hint: Magnetize your screwdriver when reinstalling those little screws. You'll have enough juggling to do. |
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Title: Re: Re-jeting my carb Post by Savage_Rob on 04/10/07 at 10:03:34 Greg_650 wrote:
Oh yeah, good point. Forgot that was done too. Try to get stainless if you can. ACE hardware carries 'em in my area. |
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Title: Re: Re-jeting my carb Post by strangeling67 on 04/10/07 at 14:28:32 Greg_650, How do you actually know when you have the correct size jet installed ? Is the black soot or backfire caused by a jet that is too small or too large ? Glenn |
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Title: Re: Re-jeting my carb Post by Greg_650 on 04/10/07 at 15:26:03 strangeling67 wrote:
Backfires are generally caused by a lean mixture (small jet). Soot or blackish smoke would mean a rich mixture (large jet). The "sweet spot" is in the middle where it burns clean, sounds good, and has good power. The other day, based on a guys exhaust color, very few backfires, and other stuff I opted to just change his main jet 1 size to a 147.5. We could have gone bigger, and may anyway, but black smoke is nothing more than wasted gas. So, we'll see (see note)... If you have a stock exhaust you can simply go up one 1 size and change the spacer for a lot more fun and less noise. Then if you change other stuff for better flow, you can increase the jets even more just to keep that sweet spot. Note: this was an unusual case too. The Stinger has a 2002, with only a small amount of bluing on his SuperTrapp (w/ 8 disks) and no bluing on his header. I didn't hear it running before this work but he swears it never backfires. Even better, all his jets were stock. So, I thought it might be better to just try to just get more power without disturbing a good thing. 1/2 spacer and 147.5 is all we did. We cranked it before I left, but it wasn't ready for the street yet. Time will tell. |
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Title: Re: Re-jeting my carb Post by strangeling67 on 04/10/07 at 16:07:40 Thanks, I have a 07 s40 with a Jardine and the dealer said it didn't need to be rejetted but I have a lot of backfiing on deceleration so I just changed it to a 147.5 from the stock 145 but think maybe I should have gone to a 150. I don't know. |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/10/07 at 19:56:29 Lots of help guys. Thanks for the feedback. |
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Title: Re: Re-jeting my carb Post by Greg_650 on 04/11/07 at 09:50:19 strangeling67 wrote:
Dealers don't want to help with rejetting on carburetor bikes. I'm not surprised. My spouse has a 152.5 with her Trapp and 14 disks. I was trying a 157.5 with my Raask, but I just changed it back to a 155 because of the soot in the pipe and on the brake actuator arm....not sure what I'll need when I get the head back on though |
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Title: Re: Re-jeting my carb Post by Reelthing on 04/11/07 at 12:58:28 Greg_650 wrote:
likely just as well - they'd screw it up anyway - now a independent shop that works on a large range of bikes is a different story - actually found 2 still in business in my area(s) - mostly wrench used ones for resale - but are willing to work on anything looks to me like |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/11/07 at 13:01:10 I am going to try a 152.5 and shaving the white spacer. I will keep you all informed. I probably will not get the actual work until Fri. |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/16/07 at 09:05:47 Hello everyone, I wanted give an update on the my bike. I rejeted the bike this weekend with a 152.5 and shaved the white space in half. This made big difference in the performance of the bike. The bike no longer has that laggg when excelerating. There is smooth power from bottom to top. I had to adjust my Idle and Idle screw because it kept dieing. Now it idles and runs so much better. It does continue to back fire. I guess I will never get rid of that. Does anyone have a suggestion on fixing that back fire. It is not bad but it does backfire. |
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Title: Re: Re-jeting my carb Post by Reelthing on 04/16/07 at 09:41:56 and your sure there are not air leaks at the cylinder/head pipe/muffler or carb/cylinder? |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/16/07 at 11:00:42 I order a seal that goes between the head at the top of the motor and the pipe. Mine didn't have one when I pulled it off to put my new pipe together and on. Maybe thats my problem. Let's hope. |
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Title: Re: Re-jeting my carb Post by Reelthing on 04/16/07 at 12:07:03 none at all? Oh - yes until your sure you have a good seal there looking else where needs to wait |
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Title: Re: Re-jeting my carb Post by Austin_man on 04/16/07 at 12:58:17 Ok, My seal will be here tomorrow. I will let you know. Thanks. |
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Title: Re: Re-jeting my carb Post by georgekathe on 04/16/07 at 18:04:18 remember to torque the bolts keeping the header on the engine when engine is cold - also only torque to recommended setting. Greg also has advised (said it was an old rule) to check them again later after you have ridden the bike for a while. I know I did mine - thought I had a leak @ muffler end & thought to check these bolts @ same time - one was no longer @ correct torque setting. had no leak anywhere (no popping or banging after tuned carb), but this was before I tuned carb & was trying to minimize my back firing somehow. Almost gone now - just once in a while which is OK by me. |
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Title: Re: Re-jeting my carb Post by Greg_650 on 04/16/07 at 23:18:33 Austin_man wrote:
Seems like you really would have had an exhaust leak without one. Sure it just wasn't all black and nasty up in there? Mine looked like part of the head when I removed it. Really. Don't wanna put a new one on top of the old one.... |
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Title: Re: Re-jeting my carb Post by Greg_650 on 04/16/07 at 23:22:09 georgekathe wrote:
I say that because of the expansion of the different metals with the bolts and the head, plus the gasket is a crush gasket. You don't want it too tight, just enough to stay together and seal good. |
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