SuzukiSavage.com - Research,S-40 Backfire Issues

WD

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Professional
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trash".

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Rosemark TN
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Re: Research,S-40 Backfire Issues
Reply #15 - 08/11/05 at 07:02:05

My wife's 1996 Intruder pops on decelleration much worse than the Savage does. 2 cylinders, 2 pipes, 2 carbs. In essence, two LS400s sharings a common crankcase.

My friend's 1982 Honda FT500 Ascot pops the same as a Savage.

So do my 1949 Dodge truck, 1969 Dodge truck, and 1985 Ford truck.

If the engine is "carbon dated" Roll Eyes

it's going to make some funky noise on decel and shut down unless/until every minor component is perfect. And considering that 10 degrees or 100 feet of elevation gain/loss change the carb tuning requirements... I see it as "character", and it's one of the reasons I'm buying a Shovelhead with non-baffled pipes.
-WD

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On 2 wheels since 7/87

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LANCER

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Re: Research,S-40 Backfire Issues
Reply #16 - 08/11/05 at 09:51:40

No need to rejet for altitude changes if you choose to go with an Edelbrock Quicksilver. The times I have had one on my Savage it worked perfectly. Never once coughed, sneezed or farted....a perfect gentleman the whole time!

By the way, has anyone played with the idea of using a 100mm piston out of a DR650 for the Savage? In 1995-96 or 98 the DR and the Savage used a common piston and wrist pin, and there is a 100mm DR piston available. I have an extra cylinder for a little R&D work and I thought I would try it on for size. Any thoughts or even better...experience in this area?

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Digger

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Re: Research,S-40 Backfire Issues
Reply #17 - 08/12/05 at 21:31:23

I tried to fix my backfire problem by removing the white spacer and adjusting the mixture screw a few years back when I lived in Houston (sea level). The bike ran too rich and I fouled two plugs before I wised up and put the spacer back in the carb.

Now that I'm living in Colorado Springs at 6500' elevation, my Savage runs much better!

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Digger
2001, Metallic Glacial Blue, Raptor Petcock, Verslavy (first hole) (otherwise, mechanically, the bike is stock), 13,xxx miles
I don't own a cage.
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sluggo

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moses lake washington
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Re: Research,S-40 Backfire Issues
Reply #18 - 08/12/05 at 21:55:00

Digger wrote on 12/31/69 at 16:00:08:

I tried to fix my backfire problem by removing the white spacer and adjusting the mixture screw a few years back when I lived in Houston (sea level). The bike ran too rich and I fouled two plugs before I wised up and put the spacer back in the carb.

Now that I'm living in Colorado Springs at 6500' elevation, my Savage runs much better!

it's my understanding that you should reduce the size of the spacer not remove it completly.

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SINGLES RULE, HARLEYS DROOL

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Reelthing

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Re: Research,S-40 Backfire Issues
Reply #19 - 08/12/05 at 23:26:35

LANCER wrote on 12/31/69 at 16:00:08:

By the way, has anyone played with the idea of using a 100mm piston out of a DR650 for the Savage? In 1995-96 or 98 the DR and the Savage used a common piston and wrist pin, and there is a 100mm DR piston available. I have an extra cylinder for a little R&D work and I thought I would try it on for size. Any thoughts or even better...experience in this area?

If I remember correct woodworker did a .120" overbore or about 3mm - that's 97mm piston - is there enough meat in the cylinder to bore it a 1/4 inch over stock?

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