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Message started by Cincy on 08/17/07 at 10:23:37

Title: Carburetor Problem
Post by Cincy on 08/17/07 at 10:23:37

I have an odd intermittant problem on my 1996 (12,000 miles). Sometimes when I am cruising at highway speeds of 60 or higher my motor will cut out as if it is out of gas. If I move the fuel valve lever to the prime position the bike will recover and run fine. (I know not to leave it in this position after the engine is off as gas will continue to flow into the carb). After reading some other postings here I thought there might be something in the gas tank so I removed and cleaned it and added an external filter between the gas tank and the carb. No change. It really isn't a huge problem but it is annoying. Any insight into the nature of the problem would be greatly appreciated.

Thanks in advance!

Title: Re: Carburetor Problem
Post by Reelthing on 08/17/07 at 10:28:37

sounds like the infamous diaphram in the petc0ck or the vac line running to it - might want to change the vac line just because it's a really cheap thing to do first, also you can take the petc0ck apart and clean/inspect it.

Title: Re: Carburetor Problem
Post by Savage_Rob on 08/17/07 at 10:30:14

This is not unheard of and it's often the sidestand interlock. It will kill the engine if the bike is in gear and it thinks the sidestand is down. If it's just slightly loose and jiggles, it can cause the engine to stutter. The same can be said for a loose connector... or the stuff Reelthing mentioned above.

Title: Re: Carburetor Problem
Post by Balderdash on 08/17/07 at 10:32:07

Since you already cleaned out the pet0ck and filter...

The vacuum hose from the right side of the carb to the back tube of the petc0ck has to be air tight at both ends and without holes, if it looses vacuum (especially at speed) then the vacuum pressure won't be enough to pull the membrane far enough, the petc0ck wont let enough gas past to feed the engine.

Take the tube off, inspect it for leaks, if it has a leak replace it or cut it off if you can. If there are no leaks, put a little dab of sealant on both plugs and then put the tube back on (make sure the hose clamps are squeezing the hose a little and not just sitting there). If the clamps aren't holding tight you can substitute some trash bag twist tie wires to hold the tube tight around the plug.

Title: Re: Carburetor Problem
Post by youzguyz on 08/17/07 at 10:35:12

The petc0ck link:
http://suzukisavage.com/cgi-bin/YaBB.pl?board=tech;action=display;num=1113631600

Title: Re: Carburetor Problem
Post by Cincy on 08/17/07 at 10:44:43

Thanks Balderdash! A vacuum leak sounds very reasonable and I will make the twist tie/sealant repair as you suggested. Thanks again! :)

Title: Re: Carburetor Problem
Post by verslagen1 on 08/17/07 at 11:35:19

I've had the same problem with my '96.
So I've run on 'Res' since I've gotten it and it runs fine that way. Just have to watch my gas closely. That's easy to do durring the week.

I'm thinking it may be either a leaky vac line, clogged or varnished over petc0ck screen or the diapham may be hardening. Replaced the vac line, no fuel in it either, had the petc0ck out and completely apart with no evidence of a problem. It's also possible when I had it apart that it didn't go back together correctly and the spring is out of place. Some day I'll take it apart again.

Title: Re: Carburetor Problem
Post by Cincy on 08/20/07 at 14:09:39

I found that there was no clamp next to the fuel valve so all I had to do was fit the hose tighter and install twist-tie clamps and the problem seems to be corrected. When I described this problem to my stealership over a year ago, you would have thought that they could have had a clue to the problem. Instead, they diagnosed an electrical problem and needlessly replaced my starter switch for $200.

Thanks again for a great and easy fix!

Title: Re: Carburetor Problem
Post by Reelthing on 08/20/07 at 15:27:57

Cincy wrote:

When I described this problem to my stealership over a year ago, you would have thought that they could have had a clue to the problem. Instead, they diagnosed an electrical problem and needlessly replaced my starter switch for $200.

Thanks again for a great and easy fix!

they look something like this:

http://www.hollywoodstandups.com/images/bozo.jpg