|
SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Carb changes to make /cgi-bin/YaBB.pl?num=1411321385 Message started by NCSUindy09 on 09/21/14 at 10:43:05 |
|
Title: Carb changes to make Post by NCSUindy09 on 09/21/14 at 10:43:05 Hey guys. I think it's about time to rejet the carb and maybe take out the white spacer. I was wondering if anyone had a guess at which size jets I'll need and which ones to replace. Here's my setup: 1986 with 18k miles Stock muffler (With a couple small holes for sound) Cone style air filter (lots of air) Raptor Petcock Idle mix screw is probably 3+ turns out Stock Jets/carb Stock everything else 315ft above sea level Right now I get a ton of engine braking and some loud backfire on decel. The acceleration is pretty good. Warms up and idles well. I get occasional flooding but it's probably just from crap in the tank getting the float valve stuck. A few good whacks usually fixes that. I'll probably invest in a fuel filter soon. I'm checking with some friends to try to find an audio/electronic tach to make things easier. Yay turd polishing ;D ;D Thanks |
|
Title: Re: Carb changes to make Post by Ed L. on 09/21/14 at 10:59:37 Don't take out the entire white spacer, it will make the bike run too rich in the mid range. Get some small washers and use them to stack up to about half the white spacer height. That should be about right for your setup. Or you can shave the spacer down. The main and pilot jet should be just about right and I wouldn't swap them out quite yet. I ran a 152.5 main with the stock pilot jet for years with no problem and my bike has open exhaust and intake. Just upgraded to a stage 1 cam and did a 155 main and 50 pilot rejet for the new cam profile. If you are going to change out a jet start with the main, all the pilot does is control the idle and very bottom end. One change at a time is the best way to tune the carb. Been polishing my turd for quite a few years now, fun isn't it? ;) |
|
Title: Re: Carb changes to make Post by verslagen1 on 09/21/14 at 11:05:27 Sounds to me like you don't need to change a thing. Quote:
Quote:
'86 had a 155, and I don't hear you complaining about the top end. Quote:
|
|
Title: Re: Carb changes to make Post by NCSUindy09 on 09/21/14 at 11:28:45 Cool, thanks. I've cleaned out the carb before as thoroughly as I could. I'm not sure what the TUV valve is though. I'll give it another good cleaning and maybe fiddle with the spacer next weekend. Thanks for the tips |
|
Title: Re: Carb changes to make Post by Serowbot on 09/21/14 at 11:33:59 FYi.. the 86' don't even have a spacer... ...it's got a notched needle... ;)... It's a TEV valve... (throttle enrichment valve)... it get's pulled open at high vacuum decel to toss a little juice out the pipe, reducing afterfires.. Right-side.. near the vac line tap... 3 screw cover plate, I think... :-?... Number 12... http://p1.bikepics.com/2007%5C10%5C08%5Cbikepics-1049897-800.jpg |
|
Title: Re: Carb changes to make Post by Ed L. on 09/21/14 at 11:37:33 Check for exhaust leaks, they can cause some real good pops out the pipe. The gasket that goes between the head and header pipe will get crushed flat after a few teardowns and give some good snap, crackles and pops. It's one of those things that might look good but leaks no matter how hard the bolts are tightened. |
|
Title: Re: Carb changes to make Post by justin_o_guy2 on 09/21/14 at 14:47:20 And you are better off needing to snug them every so often than stripping the threads trying to make sure they stay tight. Snug when the motor is cool. |
|
Title: Re: Carb changes to make Post by NCSUindy09 on 09/22/14 at 09:19:00 The backfire sounds like it's coming from the air filter rather than the muffler. After I put the air filter on I got a decent HP boost and a much meaner sound. Sound from the intake is much louder than the exhaust. Also yeah I didn't know what that was (TEV valve) when I cleaned the carb so I left it alone. Gonna get that sucker this time. |
|
Title: Re: Carb changes to make Post by 49mack on 09/24/14 at 08:09:16 NCSUindy09: poke around on this forum and find the thread on cutting a single coil off the TSU or anti-reversionary valve. That's on the right side of the carb held in place by 3 screws. This reduced a lot of backfire for me. While you're at it, replace those 3 screws with allen head cap screws (home Depot) and it will save you the hassle of future "screw-ups" when the Phillips head screws made of Silly Putty eventually strip. Look for zinc or plated screws. The black oxide w screws will eventually rust. |
|
Title: Re: Carb changes to make Post by justin_o_guy2 on 09/24/14 at 09:09:33 I use Anti-seize on just about every bolt that screws into aluminum.. especially on the carb. The valve cover bolts,for sure.. |
|
Title: Re: Carb changes to make Post by leconya on 09/26/14 at 11:06:25 I have 05 S40. I backfire like crazy. Previous owner did drill out the bafflers. >:( I don't mind the loud pipes but the backfireing is driving me crazing and scaring people on the streets. :-[ Help! |
|
Title: Re: Carb changes to make Post by verslagen1 on 09/26/14 at 12:38:20 2D202D202D202F26410 wrote:
You need to rejet, see carb tuning in the tech section. |
|
Title: Re: Carb changes to make Post by justin_o_guy2 on 09/26/14 at 13:09:01 Even with all stock setup my 05 made too much racket on decel. I'm not sure now,because that was a long time ago,but I don't think I had found this place at the time. Now,knowing what I've learned here,I'm pretty sure that the header bolts or something needed attention. I'm pretty sure it was not doing that for the first few hundred miles. Anyway,I dropped the$$$$ for a Supertrap and the pack of extra disks,put in a fatter main, slimmed the white washer down and it ran really nice and sounded really sweet.. BUT,if I had it to do over again,I'd slap a Dyna on it and tune the carb to that. They are better looking than the Trapp, and cost a lot less AND the performance and sound are too close to be worth spending the money on. Changes to the intake don't have near the impact on mixture inside the cylinder as changes in exhaust restrictions. The piston pumps that out,using a ring designed for pushing. Intake,OTOH,is a product of vacuum, which isn't as efficient as exhaust. |
|
SuzukiSavage.com » Powered by YaBB 2.2! YaBB © 2000-2007. All Rights Reserved. |