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General Category >> Rubber Side Down! >> it runs, but not good
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Message started by LeadfootLambert on 05/18/13 at 19:41:00

Title: it runs, but not good
Post by LeadfootLambert on 05/18/13 at 19:41:00

Some of you may have read my intro, I am fixing up a savage for a coworker, it's been in storage for 10 years so first thing I did was open up the carb and clean it, it was dry but the jets were plugged and the needle and seat were junk, I replaced the needle and seat, bought a Raptor petcock, new gas in tank, new battery. it will start and idle, but that's it if you try to give it any gas it backfires out the exhaust and stalls, also the mixture screw seems to have no effect on the way it runs except if you turn it all the way in it will stall, anything from 1/8 out to 3 turns out makes no diff. I noticed when cleaning the pilot jet there are no holes on its sides like the one shown in the picture on the download cd, is this normal? also the opening on the screwdriver slot end of the jet is much larger than the other end, again normal? everything else in the carb looks good, no tears in the plunger diaphragm, the small diaphragm on the side looks good also, float level is good, no fuel pouring out the bowl vents, I blew compressed air through all passages, all seem clear, any ideas? New spark plug also!

Title: Re: it runs, but not good
Post by 00savage on 05/19/13 at 04:04:13

Hi leadfoot. Go to the market place section of the forum. Click on lancers performance parts. He sells a jet set kit. Try rejetting the carb and doing the white spacer mod. Lots of info in the tech section about it. Rejetted mine and did the white spacer mod last week. She's running better than ever. Runs smooth & no more backfires. Good luck & keep us posted on your progress.

Title: Re: it runs, but not good
Post by ToesNose on 05/19/13 at 04:18:02

Are there any other mods done to the bike? Did you check the spark plug? ;)

Title: Re: it runs, but not good
Post by Dave on 05/19/13 at 06:42:24

The air bleed holes on the side of the Pilot Jet are not needed or used on the stock Savage carb. If you do get that kind of jet....it will still work just like a pilot jet without air bleed holes....as there is no air supply to those jets in the stock carb.

Title: Re: it runs, but not good
Post by DavidOfMA on 05/19/13 at 07:22:11

Is the bike stock? What sizes are the pilot and main jets?

Just looked at my small collection of jets. On some the screwdriver side is larger than the outlet and on one other it's the reverse. So I doubt that's the problem. L

If the plug looks good, what happens if you try to give it gas with the choke out one notch?

Title: Re: it runs, but not good
Post by Steve H on 05/19/13 at 08:33:54

Make sure the needle is in the slide right. When I got mine, the needle was below the spring. Did exactly the same thing. When I took it apart and put the needle above the spring, it ran great.

Title: Re: it runs, but not good
Post by Routy on 05/19/13 at 08:34:39

You have to assume it was running good when it was parked. Don't start to modify anything now and get into more problems than what you have now. If it appears to be stock jetting etc, and hasn't been hacked, get it running right first, then mod it later, and then only if needed, and only where needed.

Make sure the bowl is staying full to the gasket, or else it won't take much throttle, just as you're having trouble w/. If it is full, then you are back into the carb, for finding the problem.
If the bowl isn't full, then check for blockage upstream to the tank.

Smeone said you can check the fuel level w/ a clear hose connected to the nipple on the bottom of the bowl, and then open the drain plug.

Title: Re: it runs, but not good
Post by justin_o_guy2 on 05/19/13 at 09:21:46

Yep,, first thing, see if its stock, if it is, it otta run good.
Mine wont let me give it gas when its cold, itll coff & die.
It takes me a few minutes of diddlin with it to get it ready to run.

Raise the idle up to just short of "Thats ridiculous"..

Title: Re: it runs, but not good
Post by LeadfootLambert on 05/19/13 at 15:12:27

Ok, I assume it ran well when put up 10 years ago, but I don't know for sure. It's is all stock. I did not remove the needle from the slide but I will check that. I will also check the float level again, I did replace the spark plug. The smaller end of the pilot jet is so small my wife's sewing needle wont fit thru. Only other question I can think of right now is will it run okay with the boot between the carb and air cleaner removed or does it need to be there? it's off right now for ease of removal of the carb again and again, will be reinstalled when done messing with it. Thanks for all the help!

Title: Re: it runs, but not good
Post by LeadfootLambert on 05/19/13 at 16:36:29

the plug shows lean,
http://i194.photobucket.com/albums/z95/axeman39/null_zpsa9445c43.jpg
I raised the float level till it just seeps out with no gasket, it definitely runs better, ;D but not perfect yet, mixture screw still not doing anything, if i put the palm of my hand 1/4 inch behind the carb it revs much better and doesn't backfire.

Title: Re: it runs, but not good
Post by LeadfootLambert on 05/19/13 at 17:09:42

Here's how it runs now, click picture for video
http://i194.photobucket.com/albums/z95/axeman39/th_692C4433-24DE-4C27-AEBF-5082AF070867-5227-000004A0047EB901_zpsba08c278.jpg (http://i194.photobucket.com/albums/z95/axeman39/692C4433-24DE-4C27-AEBF-5082AF070867-5227-000004A0047EB901_zpsba08c278.mp4)

Title: Re: it runs, but not good
Post by Digger on 05/19/13 at 19:04:54

Sounds lean to me....rpms hanging on the overrun.

Sat for 10 years...did you dip the carb body?

Good luck!

Title: Re: it runs, but not good
Post by LeadfootLambert on 05/20/13 at 15:28:59

Carb body is spotless, I agree it's lean, today I brought the carb to work and removed the white spacer and replaced it with one of exactly half the thickness, this should richen it up a bit, also looked at the jets with a magnifying glass it"s got a 47.5 pilot and a 152 main jet, I'm heading out to the garage to reinstall the carb in a bit, will report back.

Title: Re: it runs, but not good
Post by LeadfootLambert on 05/20/13 at 17:09:46

Here's the results, a decent running savage! Thanks for all the help!
http://www.youtube.com/watch?v=1VEV36nsxuo

Title: Re: it runs, but not good
Post by ToesNose on 05/21/13 at 04:23:38

"Sounds good to me.....ready to ride" I second that LeadFoot! :)

Title: Re: it runs, but not good
Post by justin_o_guy2 on 05/21/13 at 05:41:30

& what did you do to achieve that little miracle?

Title: Re: it runs, but not good
Post by LeadfootLambert on 05/21/13 at 17:19:09

746B6D6A7770417141796B672C1E0 wrote:

& what did you do to achieve that little miracle?

Persistence! started by disassembling the carb, make sure all passages are clear, set float level, make sure battery is fully charged [runs crappy on low voltage] new spark plug, removed white spacer, replaced with washer half as thick, make sure boot between carb and airbox is installed, stock jetting 47.5 and 152, air screw is at 2 turns out. All I can say is only make one change at a time, and verify results before changing anything else, I had the carb on and off the bike at least a dozen times over the span of a week, don't give up and DO use this forum for info, everything you need to know about the Savage is here. Before taking on this project I had never laid hands on a Savage before, everything I know now is from here, Thanks Guys! 8-)