SuzukiSavage.com - Rejetted carb, but still WOT dead zone

Mattdw

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Rejetted carb, but still WOT dead zone
09/05/08 at 11:37:46

All,

Have a '96 Savage, all OEM stuff, air filter, muffler. I bought Lancer's kit and installed the 150 main jet, and all 3 washers for the spacer mod. Lowest and mid-range throttle are perfect. However, with WOT, still have a dead zone, almost as if there were too much fuel flowing.
Can this be right ?
If I put back my original jet, which I believe was a 145, can I leave the pilot jet in that came with the Lancer kit ?
What change in behavior might I expect ?
On a positive note, the BIG BANG is gone, but I still need the WOT throttle response.

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T Mack 1 - FSO

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Re: Rejetted carb, but still WOT dead zone
Reply #1 - 09/05/08 at 12:12:56

Hmmmm....

So, fuel circuits that react to throttle position are:
0 to 1/4 throttle: pilot / low speed screw & Jet
1/8 to 3/4 throttle: needle position (spacers)
3/4 to WOT the size of Main jet.

With that said, the 150 should be ok with a stock setup. The WOT is a stumper, how is it a 7/8 throttle? In other words, go to WOT and then roll it back a little.......

Also, check the plug. Too much fuel will be black. But if you replced the pilot jet, then it might be black from too much fuel at slow speed.

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Engineers design things, Technicians make them work.
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Mtn. Man YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 16 Ft. Collins, CO Gender:	Re: Rejetted carb, but still WOT dead zone Reply #2 - 09/05/08 at 12:18:21 If you're thinking its getting too much fuel at WOT, maybe time to ditch the stock air box/filter. Just thinking aloud...
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T Mack 1 - FSO Serious Thumper Alliance Member Offline sold 2001 LS650 for a 1986 XLH1100 Posts: 2919 Emmaus,Pa Gender:	Re: Rejetted carb, but still WOT dead zone Reply #3 - 09/05/08 at 12:26:04 Mtn. Man wrote on 09/05/08 at 12:18:21: If you're thinking its getting too much fuel at WOT, maybe time to ditch the stock air box/filter. Just thinking aloud... Oh... that turns on a light bulb..... How is the air filter??????
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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Rejetted carb, but still WOT dead zone Reply #4 - 09/05/08 at 12:26:41 real sure you got the diaphram spring back in there correct?
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Mattdw

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Re: Rejetted carb, but still WOT dead zone
Reply #5 - 09/05/08 at 12:32:10

T Mack 1 - FSO wrote on 09/05/08 at 12:26:04:

Mtn. Man wrote on 09/05/08 at 12:18:21:

If you're thinking its getting too much fuel at WOT, maybe time to ditch the stock air box/filter.

Just thinking aloud...

Oh... that turns on a light bulb..... How is the air filter??????

Air filter is brand new...just got it TODAY, the PO took it out and didn't replace it (Don't ask).

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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Rejetted carb, but still WOT dead zone Reply #6 - 09/05/08 at 12:53:12 by they way - how much of a dead spot? - just a little bit - say like the last 1/8 of the throttle - or anything past 1/2 throttle doesn't do much - so how dead is dead
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Mattdw Full Member Offline Posts: 193 Frisco, TX Gender:	Re: Rejetted carb, but still WOT dead zone Reply #7 - 09/05/08 at 12:54:04 Reelthing wrote on 09/05/08 at 12:53:12: by they way - how much of a dead spot? - just a little bit - say like the last 1/8 of the throttle - or anything past 1/2 throttle doesn't do much - so how dead is dead Yeah, I would say the last 1/8 of the throttle.
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Mattdw

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Re: Rejetted carb, but still WOT dead zone
Reply #8 - 09/05/08 at 13:11:43

T Mack 1 - FSO wrote on 09/05/08 at 12:12:56:

Hmmmm....

So, fuel circuits that react to throttle position are:
0 to 1/4 throttle: pilot / low speed screw & Jet
1/8 to 3/4 throttle: needle position (spacers)
3/4 to WOT the size of Main jet.

With that said, the 150 should be ok with a stock setup. The WOT is a stumper, how is it a 7/8 throttle? In other words, go to WOT and then roll it back a little.......

Also, check the plug. Too much fuel will be black. But if you replced the pilot jet, then it might be black from too much fuel at slow speed.

Last 1/8 is bad...rolling off and I get immediate pickup.
I did change the spark plug to an Iridium plug. Would that make a diff ?

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Mattdw Full Member Offline Posts: 193 Frisco, TX Gender:	Re: Rejetted carb, but still WOT dead zone Reply #9 - 09/05/08 at 13:18:15 Oh, FYI, I don't recall the 'dead zone' with the stock main jet and pilot jet, but I would get the BIG BANG, which is my main reason for rejetting when i could not get rid of it with adjusting the air bleed
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verslagen1

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Re: Rejetted carb, but still WOT dead zone
Reply #10 - 09/05/08 at 13:24:52

Mattdw wrote on 09/05/08 at 13:11:43:

T Mack 1 - FSO wrote on 09/05/08 at 12:12:56:

Hmmmm....

So, fuel circuits that react to throttle position are:
0 to 1/4 throttle: pilot / low speed screw & Jet
1/8 to 3/4 throttle: needle position (spacers)
3/4 to WOT the size of Main jet.

With that said, the 150 should be ok with a stock setup. The WOT is a stumper, how is it a 7/8 throttle? In other words, go to WOT and then roll it back a little.......

Also, check the plug. Too much fuel will be black. But if you replced the pilot jet, then it might be black from too much fuel at slow speed.

Last 1/8 is bad...rolling off and I get immediate pickup.
I did change the spark plug to an Iridium plug. Would that make a diff ?

You need to increase your main jet.

And I'd put back the white spacer till this is right.

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