SuzukiSavage.com - Carb-Jet Question

CPLgrr-USMC

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Carb-Jet Question
05/19/09 at 19:26:45

I have the stock Mikuni on my '96 Savage. I bought the bike used and I'm just assuming that the last owner didn't rejet or anything. But when I bought the bike the idle mix plug was already drilled and pulled out. I'm adding a K&N this weekend and already have a better exhaust. I'm about 3 turns out now and could actually go for another turn out, but I won't. So, I pulled out the carb today along with the battery and airbox. I pulled out the jets and was looking for some info on what size they are. Nothing, the only markings the main jet had was like a square with another square in it. And that's it. Does anybody know if this is the stock main jet or? Because I'm clueless as to finding out. Thanks
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LANCER

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Re: Carb-Jet Question
Reply #1 - 05/19/09 at 20:06:00

The stock main jet has a round head with a straight slot for a screw driver. There are supposed to be numbers after the little square you saw but could with age have worn down. Did you try looking at them under a magnifying glass ? I have to use it all the time.
The pilot jet has the little square & numbers on the side under the threads as you hold it thread end up.
With your pilot screw 3 turns out and it acting like it wants more then it sounds like you are ready to to up 1 size on the pilot jet.
Are you clear on the basic routine of jetting and tuning each of the 3 primary fuel circuits ?
-Low throttle range (idle to 1/4 throttle) pilot jet circuit
-Mid throttle range (1/4- 3/4 throttle) needle jet and jet needle...basically the white spacer on the needle
-Hight throttle range (3/4-wide open throttle) main jet

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CPLgrr-USMC

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Re: Carb-Jet Question
Reply #2 - 05/19/09 at 20:15:17

Yes, I understand the fuel circuits. I've been researching this carb for a while now. Thanks for the info, I'll get workin on that in the morning. My next problem is that I stripped one of the screws to get to the white spacer and needle. I felt like such an idiot. And now I don't know how to get that guy out. He's deep in there. And as luck would have it my screw extractor broke the last time I tried to use it.

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seviersavage Senior Member Offline SuzukiSavage.com Rocks! Posts: 364 Smoky Mountains Tennessee Gender:	Re: Carb-Jet Question Reply #3 - 05/19/09 at 20:20:26 I ended up having to drill the screw head and use an easy out. Needed an extension with a dremel tool to reach it. Seviersavage
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marshall13

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Re: Carb-Jet Question
Reply #4 - 05/19/09 at 21:07:35

CPLgrr-USMC wrote on 05/19/09 at 20:15:17:

Yes, I understand the fuel circuits. I've been researching this carb for a while now. Thanks for the info, I'll get workin on that in the morning. My next problem is that I stripped one of the screws to get to the white spacer and needle. I felt like such an idiot. And now I don't know how to get that guy out. He's deep in there. And as luck would have it my screw extractor broke the last time I tried to use it.

small needlenose vice grips(you'll only get about 10 degrees of turn, so make sure you set them right), after you put the tip of a soldering gun to the screw for a minute or so... toasty warm, and the aluminum casting will expand more than the screw...

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Reelthing

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Re: Carb-Jet Question
Reply #5 - 05/20/09 at 06:21:03

CPLgrr-USMC wrote on 05/19/09 at 19:26:45:

....the only markings the main jet had was like a square with another square in it......

That's the mikuni jet mark so at least it's not a junk aftermarket jet, stock or not there is no way to tell without the number - sometimes the stamping is very light in the brass - might need to polish it a little and get a mag glass - it's there. A clue might be if the brass plug was still in place over the mixture screw if it is odds are good the carb hasn't been touched - and toss the carb body screws as far as you can - pick up some stainless allen heads.

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Fubar YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 15 Ohio Gender:	Re: Carb-Jet Question Reply #6 - 05/20/09 at 06:27:10 The factory main jet is a 145 and mine had the number on top when I pulled it. My savage is an 03 thou and that might be why mine was numbered. Hope that help.
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CPLgrr-USMC Junior Member Offline First Bike Love Posts: 71 Camp Pendleton, CA	Re: Carb-Jet Question Reply #7 - 05/20/09 at 19:09:58 Got it, the guy at the cycle shop used a mikuni tool and was able to tell me that it was a 145.
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haulback

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Re: Carb-Jet Question
Reply #8 - 05/22/09 at 06:08:40

Good point.... anyone know offhand what size the fasteners are for the float bowl, so a guy could pick up replacements beforehand???

Or, if you get a set of JIS screwdrivers, (I assume they are used elsewhere on the bike) is it neccesary to replace them..that is, is the reason people get so p-o'ed at them because they don't have correct drivers??

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PTRider

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Re: Carb-Jet Question
Reply #9 - 05/22/09 at 06:53:59

The two screws next to the battery case are tough to get a straight shot at. It's the angle of the screwdriver that strips out the heads. A socket head capscrew and ball-end hex key (Allen wrench) makes the job easier. Or, just use a #2 Phillips driver bit with a wrench on the hex. That gets close to the battery case OK. Screw size?...4mm dia. x 16mm long???, plus lockwashers. It's easy to take out of of the accesible screws (left front) and measure it.

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dasch Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1137	Re: Carb-Jet Question Reply #10 - 05/22/09 at 08:45:56 Float bowl: Metric 5 x 16 long, not 4!! Swap stock ones with stainless allen screws, much easier to work. Same for the top carb cover. Metric 5 x 10 long. Swap them all with allen heads. Same goes for all other phillips and flat head screws. Use allens.
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