SuzukiSavage.com - S40 stock carb

BOBD Full Member Offline Posts: 170 Blacklick, Ohio Gender:	S40 stock carb 11/02/12 at 03:52:59 What carb. would be a direct replacement for the stock carb on a 2012 S40? I messed up the air screw on the stock one and wonder about replacing it with something else. I mean the air screw is really really screwed! Hope it doesn't cost too much to do. Or does someone have a stock one with an air screw that works?
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verslagen1

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Re: S40 stock carb
Reply #1 - 11/02/12 at 09:13:18

Any of the replacements we've found are generally for performance improvements. Hence we live with the changes we need to make to get them to work.

VM36 or 38, requires a new throttle cable, rejetting.

The stock carb is a BS40, we generally go down a size because this carb has a butterfly whichs restricts the flow of a 40.

A 36 will have better low rpm performance, a 38 maybe equal. ask lancer, he's messed with it the most. A 40 will have real good top end, but be iffy at idle.

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BOBD

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Re: S40 stock carb
Reply #2 - 11/02/12 at 10:07:07

verslagen1 wrote on 11/02/12 at 09:13:18:

Any of the replacements we've found are generally for performance improvements. Hence we live with the changes we need to make to get them to work.

VM36 or 38, requires a new throttle cable, rejetting.

The stock carb is a BS40, we generally go down a size because this carb has a butterfly whichs restricts the flow of a 40.

A 36 will have better low rpm performance, a 38 maybe equal. ask lancer, he's messed with it the most. A 40 will have real good top end, but be iffy at idle.

Thanks for the info. I bought a used stock carb from Cavi Mike for $50. I'm going to use it. The air screw has never been touched. Still has the cap over it.

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« Last Edit: 11/02/12 at 15:28:25 by BOBD »

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LANCER

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Re: S40 stock carb
Reply #3 - 11/02/12 at 17:22:54

As soon as you get the carb and remove the cover from over the pilot screw, soak it with a penetrating oil of some kind for a couple of days, applying the oil 2-3 times/day.
You want that screw to turn EASILY to avoid tearing it up, and BE SURE to use a screw driver that fits the screw slot snugly.
You should also clean the screw head with carb cleaner before putting the driver to it to eliminate slipping.

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