SuzukiSavage.com - Carb Confusion, Pt 2

DrunkenDwarf Senior Member Offline Morning Zombie Posts: 325 Seattle, WA Gender:	Re: Carb Confusion, Pt 2 Reply #15 - 08/31/10 at 21:08:08 Thanks ralfyguy. Good to know I'm not the only one. What jetting are you currently using? I'm going to try to dial in the 52.5, but I'll probably go back to the 55 to try to reduce the wonkiness at 1/8 to 1/4 throttle. I'm hesitant to reduce the needle spacer to 1mm. That's the other option. -D. Dwarf
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ralfyguy

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Re: Carb Confusion, Pt 2
Reply #16 - 09/01/10 at 04:35:15

I run the 145 stock main and the 52.5 pilot, but with bleed holes. I tried the 55 pilot, but it was too rich. I have stock air filter and stock exhaust, but the baffle removed. I tried a 150 main, but it was too rich with plug fouling. I replaced the white spacer with 3 washers from Lancer's kit. Brings it down to 2/3. If your 55 pilot doesn't have bleed holes, try one of those.

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DrunkenDwarf

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Re: Carb Confusion, Pt 2
Reply #17 - 09/01/10 at 07:59:47

I've tried 55 w/ holes and 52.5 w/ holes. I'm currently using the 52.5. It's been hotter than normal this week (it's always very humid) and I've dialed in the idle at 1 1/2 turns (plus or minus 1/4 turns). The shutdown WUMP is pretty significant, but not quite to BANG levels.

I don't want to mess with it too much until the weather cools off. Hate to end up too lean when it's 40 degrees cooler out.

I also need to find someplace to test the main jet. I've had mediocre success with the standard roll-off test.

-D. Dwarf

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Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock

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ralfyguy

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Re: Carb Confusion, Pt 2
Reply #18 - 09/01/10 at 09:52:10

Maybe 1 1/2 turns isn't enough. Did you try the correct method with were the idle runs the highest? The sweet spot on mine seems to be 2 turns out. And then I turned it out another 1/4 turn, just when the idle wants to start going down again, because I want it a tad on the rich side. When I had the 55 pilot I had to turn it all the way in and it was still too rich. That's why I put the 52.5 back in.

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DrunkenDwarf

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Re: Carb Confusion, Pt 2
Reply #19 - 09/01/10 at 17:17:28

ralfyguy wrote on 09/01/10 at 09:52:10:

Maybe 1 1/2 turns isn't enough. Did you try the correct method with were the idle runs the highest? The sweet spot on mine seems to be 2 turns out. And then I turned it out another 1/4 turn, just when the idle wants to start going down again, because I want it a tad on the rich side. When I had the 55 pilot I had to turn it all the way in and it was still too rich. That's why I put the 52.5 back in.

I don't know if it's correct, but here's what I did.

Rode to work. About 9 miles total, about of it is 4 highway. Stopped in the parking lot.
Adjusted the screw out until it the engine slowed a lot. 2 1/2 turns
Adjusted the screw in until the engine slowed a lot. 1/2 turns
Adjusted the screw out until the engine slowed a little. 2 turns
Adjusted the screw in until the engine slowed a little. 1 turn

Adjustments were in 1/2 turn increments. The difference between 1, 1 1/2, and 2 turns is very subtle.
It was roughly 70 F and 70% humidity at the time.

Maybe it'll turn it out a 1/4 turn tomorrow and see if there's a response.

-D. Dwarf

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Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock

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