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Message started by John E Black on 04/24/16 at 15:17:47

Title: Carb issue
Post by John E Black on 04/24/16 at 15:17:47

Howdy
Recently completed a RYCA conversion with a 2004 Savage...issue I have is its not running smoothly. During the build, before remounting the tank, I did a carb tuning using an auxiliary fuel source. I followed the instructions, did the adjustments and the engine ran pretty good. Now that everything is assembled, including a new fuel thingy, it only seems to run, and not that well btw, when the fuel thingy is set to Prime. If I turn the thingy to FUEL, it runs for a few minutes, then it proceeds to run roughly and then stall...
Could this be an issue with the vacuum feed? If so, how do I check it???
Help...!

Title: Re: Carb issue
Post by justin_o_guy2 on 04/24/16 at 15:53:11

Did you plug the vacuum line that WAS supposed to make the stock vacuum petcock work?

If you allow it to barely run, leaning on the sidestand, you're starving the cam for oil. Every now and then you need to get it revved up and get something under the sidestand or put it on a jack and level it up.

Title: Re: Carb issue
Post by Serowbot on 04/24/16 at 16:30:13

This, is a link...-> Test your Petcock,.. don't just turn it to Prime.. (http://suzukisavage.com/cgi-bin/YaBB.pl?num=1251932429/1) ;)...

Title: Re: Carb issue
Post by Suzukisavvy on 04/25/16 at 08:54:43

The float was bad in my bike, perhaps give it a check. Time for a Raptor Petcock

Title: Re: Carb issue
Post by John E Black on 04/25/16 at 09:42:49

Had the bike upright but did not plug the vac line...going to try tapping on the float bowl and see if that helps. And going thru the link you sent to try those tips.

BTW, I did add a small K&N filter to the engine breather line...could that affect the rough running?

Thanks much...hopefully will reply with better news soon!

Title: Re: Carb issue
Post by verslagen1 on 04/25/16 at 10:36:56

If you adjusted it to run right without the vac port plugged, and now you have it attached to the petcock, it's now way rich.

You have to start from square 1 again, do not pass go, goto jail.

Title: Re: Carb issue
Post by justin_o_guy2 on 04/25/16 at 11:51:17

Everything you've done is a potential cause.
There are small air circuits on the edge of the inlet. Some have installed a cone filter and covered them. Won't run right.
Take it off, get it running. Put it back.

Before you plugged the vacuum line it was sucking air in that had no fuel in it, less air was going through the carb,to carry fuel, and you adjusted the carb to dump enough gas to run. Then plugged it, yeah, running rich now.

Title: Re: Carb issue
Post by John E Black on 04/26/16 at 09:53:49

I see that now...forgive my inexperience, but finally starting to figure this out. Based on the comments, I'm going to opt for the Raptor petcock and plug the vac intake. Which it seems will solve the problem. And I understand I need to start at square one for tuning.
Before it arrives, in theory, can I not plug the vac fittings on the carb and the stock petcock to at least tune the carb? Or will this only prolong the problem?

Thanks

Title: Re: Carb issue
Post by DesertRat on 04/26/16 at 11:09:11

NOPE ...

the stock p3tc0ck requires the vacuum connection to draw fuel into the carb bowl.

You bypass this it no worky, or works until the fuel bowl is empty ...

either FIX your vacuum issue or swap for the raptor and plug off the vacuum connection at the carb ...

your ONLY choices ...

Title: Re: Carb issue
Post by justin_o_guy2 on 04/26/16 at 11:48:24

Plug the vacuum, put the stock petcock on prime. Might not be exact, but it will be close.
And Uninstall the rubber tube that air filter is on unless you are Absotively, Posilutey Sir tin it's not plugging anything off.

Title: Re: Carb issue
Post by John E Black on 04/26/16 at 13:06:05

Plugged both and it does run on Prime but understand this is only a temporary fix...just waiting for the Raptor to fix this issue for good.
As for the breather line...it is not plugged.
But, should I just remove it altogether? or just the filter? Seemed like a good idea at the time...

thanks

Title: Re: Carb issue
Post by verslagen1 on 04/26/16 at 13:35:03

717473757E79777A78701B0 wrote:

As for the breather line...it is not plugged.
But, should I just remove it altogether? or just the filter? Seemed like a good idea at the time...

No, filter on the end of the line is typical.
place in area where it can drip and not make a mess.

Title: Re: Carb issue
Post by justin_o_guy2 on 04/26/16 at 15:03:58

If you have installed a new air inlet tube on tye carburetor, take it off. If it runs different, go from there.

Title: Re: Carb issue
Post by Suzukisavvy on 04/27/16 at 08:53:29

Possible the front carb connecter on the engine block is leaking air.

Try starting the bike and spraying starting fluid on the connecter and if your idle increases you have a leak.

Title: Re: Carb issue
Post by justin_o_guy2 on 04/28/16 at 16:01:07

My bad,,
BTW, I did add a small K&N filter to the engine breather line...could that affect the rough running?

I saw added K&N filter and thought he replaced the a ir filter.
That's been known to cause problems.
But what he did is no biggie. Sorry.

Title: Re: Carb issue
Post by Art Webb on 04/28/16 at 20:03:25

7C5D4B5D4A4C6A594C380 wrote:

stock petcock will operate in Prime position with no vacuum, that's the purpose of the Prime setting, to get fuel to the carb when the engine isn't running
just to clarify