SuzukiSavage.com - 5th gear bogging down and sputtering and dying

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5th gear bogging down and sputtering and dying
07/29/11 at 20:59:12

hey guys i have a 98 savage and an open exhaust basically a big hollow chamber off a yamaha welded on to the head pipe and the old feller mod air filter with cover removed and snorkel removed also half white spacer mod and when i have the bike opened up in 5th gear it spits sputters and eventually dies what is causing this my air mix screw is about 2 3/4 turns out i havent rejetted yet am i getting to much air or not enough fuel or is it something different? also what is the little cable under the valve cover for and does it need to be adjusted a certain way? thanks in advance

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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: 5th gear bogging down and sputtering and dying Reply #1 - 07/29/11 at 21:17:00 Did you try it on prime ? That would sure seem like the vacuum operated petcock not opening very far. Look for a vacuum leak. The idle mix screw adjustment is never the problem at hi speed running. The cable is probably the comrpession release??
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verslagen1

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Re: 5th gear bogging down and sputtering and dying
Reply #2 - 07/29/11 at 21:28:56

mattnovy82 wrote on 07/29/11 at 20:59:12:

*an open exhaust
*and the old feller mod air filter
*with (air box) cover removed
*and snorkel removed

also half white spacer mod and when i have the bike opened up in 5th gear it spits sputters and eventually dies what is causing this my air mix screw is about 2 3/4 turns out

i haven't rejetted yet am i getting to much air or not enough fuel or is it something different?

also what is the little cable under the valve cover for and does it need to be adjusted a certain way? thanks in advance

You have all these mods and you haven't rejetted?
I'm surprised it runs long enough to get it 5th gear.

The 1st 4 bullets will make it run incredibly bad on stock jetting.

start here...
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1309246277

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mattnovy82 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 18	Re: 5th gear bogging down and sputtering and dying Reply #3 - 07/30/11 at 07:55:42 thanks alot what size jets should i get? i live in north central arkansas it is often humid here but has been dry as of lately..
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Routy

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Re: 5th gear bogging down and sputtering and dying
Reply #4 - 07/30/11 at 12:58:42

Quote:
when i have the bike opened up in 5th gear it spits sputters and eventually dies
-----------------------------------------------------------------------------
IMO, I think you have a main line fuel restriction problem, other than too small a main jet. Or at least I've never known a lean main jet to cause an engine to "die".
I'd suggest you find that problem first,.....before modding the carb.

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Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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ksthumper

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Re: 5th gear bogging down and sputtering and dying
Reply #5 - 07/30/11 at 16:47:37

I use a 152.5 main and just recently went back to the stock 52.5 pilot due to flooding issues after changing muffler styles. They are really cheap, 2 - 3 bucks apiece. Just ask for a range of jets to try for a mikuni carb.

Have you tried reducing the amount of air coming into the motor? Do you know what size jets you are running now?

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99 savage: k&n filter, .6 spacer mod, 152.5 main, stock pilot, open HD shorty "muffler" and currently working on bobbing.

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mattnovy82 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 18	Re: 5th gear bogging down and sputtering and dying Reply #6 - 07/31/11 at 13:02:37 as far as i know they are the stock jets.... whatever they are? i planned on putting the cover back on the air box and tryin it thanks guys will try that and update any more info greatly appreciated!!!
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: 5th gear bogging down and sputtering and dying Reply #7 - 07/31/11 at 20:46:49 150 to 160, should be 5 jets.
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Starlifter Serious Thumper Offline It only snows seven months of the year here. Posts: 3746 Eastern Michigan Gender:	Re: 5th gear bogging down and sputtering and dying Reply #8 - 07/31/11 at 21:28:51 There is no 5th gear on a 98, they didn't put in a 5th gear until 2005.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: 5th gear bogging down and sputtering and dying Reply #9 - 07/31/11 at 22:02:22 Starlifter wrote on 07/31/11 at 21:28:51: There is no 5th gear on a 98, they didn't put in a 5th gear until 2005. earth to star, earth to star... huh?
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ksthumper Junior Member Offline Posts: 83 Olathe, KS Gender:	Re: 5th gear bogging down and sputtering and dying Reply #10 - 08/01/11 at 09:59:30 Pretty positive that my 99 has 5th.
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Starlifter Serious Thumper Offline It only snows seven months of the year here. Posts: 3746 Eastern Michigan Gender:	Re: 5th gear bogging down and sputtering and dying Reply #11 - 08/01/11 at 10:01:51 Sorry, I stand corrected...always thought it came in in 05. When did it come in?
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ksthumper Junior Member Offline Posts: 83 Olathe, KS Gender:	Re: 5th gear bogging down and sputtering and dying Reply #12 - 08/01/11 at 10:05:22 1995 and on
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spacepirates

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Re: 5th gear bogging down and sputtering and dying
Reply #13 - 08/01/11 at 10:35:48

Gotta check that you have three things: air, fuel, and spark. the last one isn't really an issue, at WOT the other two are more likely to be at fault.

so, check that at WOT your bike is getting just the right amount of both. Check that you have adequate fuel flow from gas tank to carb and carb to engine (petcock to prime and jetting).

There is also the chance that your air filter is all nasty and gummed up, so take it out and clean it (blow air throw it backwards).

hm, all that being said, make sure it is actually a WOT thing and not a gear things. open the throttle up all the way in any/every gear and see if the same stuff happens. if it does, then it is a fuel/air issue. if it doesn't.... Huh

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spacepirates

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Re: 5th gear bogging down and sputtering and dying
Reply #14 - 08/01/11 at 10:37:50

forgot to add:

check your spark plug.
pull the plug and look at it. the color will tell you which way you need to jet, based on where in the throttle the bike last was (over the past few minutes) before you shut it off. white = too lean, dark/black = too rich.

you'd have to ride it for a good bit of time at WoT though, and with it bogging down it wouldn't be fun...

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