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Message started by uebermann on 07/11/11 at 17:20:09

Title: Engine dies when in RES/ON
Post by uebermann on 07/11/11 at 17:20:09

Howdy,

Been reading a few things here since I got my bike a couple months ago and found the service manual and owner's manual to be great. I got a 2002 LS650 and its my first bike. Took the safety course and found a good deal on Craig's list and picked it up so I'm still a fairly new rider.

Replaced wheels and had oil changed the day after I got it and its been running great up until this past week.

Took it down to Houston on the 2nd (about 4 hour ride) and it ran great the whole way down. On July 4th, it wouldn't start like normal so I leveled it out (driveway on an incline) and found fuel level to be fine and such. Switched to RES, still no go. Put it in PRI and it started up. Switched back to ON/RES and it died after about 20 seconds.

Also, it started backfiring like crazy when idling (and dying) and when letting off the throttle, which it had never done before. I slightly adjusted the idle screw and it no longer dies when idling and the backfiring seems to have stopped when idling as well.

I read some threads on here but I'm not gonna lie, I am not familiar at all with working on my own vehicles other than basic stuff. Cleaned out air filter, replaced the fuel line hose (it had a small leak) but I found this hose loose and don't know what its for and am thinking it may be an issue? Pics below show side and location of said hose (sorry if they are big, I didn't edit them and my camera is on biggest reso it has):

http://i167.photobucket.com/albums/u142/samthup/bike1.jpg

http://i167.photobucket.com/albums/u142/samthup/hose1.jpg

http://i167.photobucket.com/albums/u142/samthup/hose2.jpg

1. What is this hose?

2. Should it be clamped off or attached to something?

I live in apartment complex and I'm not able to work on the bike here though I can take it to a friend's house this weekend and open it up if need be.

I can run it as it is but I don't like that the bike isn't running like it should and would much rather fix it instead of ignoring it.

Thanks in advance for the help and sorry for butchering any technical terms.

Title: Re: Engine dies when in RES/ON
Post by verslagen1 on 07/11/11 at 17:26:30

That's the vac hose and it why it died on you.
it turns on the petcock when the engine is running.
w/o it you have to put it in prime to get gas to the carb.
there's a nipple on the bottom of the petcock for it.

expect the rpm to pick when you reconnect it. ;D

Title: Re: Engine dies when in RES/ON
Post by uebermann on 07/11/11 at 17:45:28

noobness kicking in here - petcock is the switch with pri/on/res ?

Title: Re: Engine dies when in RES/ON
Post by Z on 07/11/11 at 17:50:27

Yes

Title: Re: Engine dies when in RES/ON
Post by uebermann on 07/11/11 at 18:05:18

Awesome thanks guys. found the "nipple" and put it back on. Runs perfectly normal again! Now I can re-adjust the idle back to normal but I'll do that tomorrow. Also have to get some kind of clamp for it (as I'm sure there's supposed to be one on it) but I'm sure those are easy enough to find at the hardware store.

Thanks for the help - greatly appreciated.

Title: Re: Engine dies when in RES/ON
Post by Oldfeller on 07/11/11 at 18:14:28

I have the exact same bike, year model, color and all.

My vac petcock acted up in all sorts of strange ways, giving me false carb errors and repeatedly dying on me in traffic (acting like I was out of gas) when I had a half a tank at least. Fixing the petcock was my main hobby for a while there.

Eventually, we discovered the Raptor manual petcock and life has sure been good since then.

Title: Re: Engine dies when in RES/ON
Post by Boofer on 07/11/11 at 18:42:29

I noticed the zip tie and slash muffler. looks like someone did a little work on it, which is fine. A four hour ride is a great test for any bike, since you likely encountered all types of roads and traffic. I change my own oil, and you can, too. It will cost about $15 if you use Suzuki filter and brand name motorcycle oil. There is a post in technical section. A set of allen wrenches will cost about $10. Still cheaper than a dealer. If it will run four hours it will run forever, more or less. Welcome. Nice ride. I think you did good. Ride safe.

Title: Re: Engine dies when in RES/ON
Post by AZSGT on 07/11/11 at 19:27:48

Question. My bike was having the same issues as his. When I saw this thread I went out and checked my bike for the same hose.

Sure enough, the hose is missing. I don't have a stock petcock
(I don't think. I just bought the bike, guy said it was new, looks new)

When I plugged the end of the hose, the rpm's went up just as Verslagen said it should.

My question is, if I don't have a stock petcock, should I cap this hose or does it reconnect to the carb as stock???

Title: Re: Engine dies when in RES/ON
Post by verslagen1 on 07/11/11 at 19:46:28

your petcock...
http://suzukisavage.com/images/uploaded/pc1.jpg

your petcock on drugs...
http://i187.photobucket.com/albums/x12/CurtisFox2004/100_1387.jpg

now which one do you have?

Title: Re: Engine dies when in RES/ON
Post by AZSGT on 07/11/11 at 19:56:30

Neither. It looks more like the raptor but not quite. It is brass colored and has off-on-res. It has no vacuum hose going to it.

Title: Re: Engine dies when in RES/ON
Post by AZSGT on 07/11/11 at 20:06:24

better yet it is even more basic. Connects to bottom of the tank and has fuel line going out. Does not have the 2 inlets you show on the top of the petcock.

Title: Re: Engine dies when in RES/ON
Post by AZSGT on 07/11/11 at 20:20:49

http://i1215.photobucket.com/albums/cc506/AZSGT/2011-07-11195326.jpg

http://i1215.photobucket.com/albums/cc506/AZSGT/2011-07-11195737.jpg

Title: Re: Engine dies when in RES/ON
Post by verslagen1 on 07/11/11 at 20:43:50

WTF is that? kinda looks like a HD petcock

and you gotta plug that port, a little rtv and a screw will do fine.

Title: Re: Engine dies when in RES/ON
Post by AZSGT on 07/11/11 at 20:46:23

don't know. I didn't install it. So just plug that vac line up?

Title: Re: Engine dies when in RES/ON
Post by verslagen1 on 07/11/11 at 20:48:06

607B726675210 wrote:

So just plug that vac line up?

you could stick a whistle in it.

Title: Re: Engine dies when in RES/ON
Post by AZSGT on 07/11/11 at 20:54:19

lol. No I think I will just go with the screw. Thanks.

Title: Re: Engine dies when in RES/ON
Post by Boofer on 07/12/11 at 06:48:34

7F6C7B7A65686E6C6738090 wrote:

WTF is that? kinda looks like a HD petcock

and you gotta plug that port, a little rtv and a screw will do fine.

Versy, I can't see what the threads are screwing into, but that looks a lot like an ATV tank. The Hondas are like that. HTH

Title: Re: Engine dies when in RES/ON
Post by RycaShawn on 07/12/11 at 21:34:14

Does the Raptor petcock work as a manual petcock like this modified stock one or will I be able to leave it on when I shut off the engine?

Title: Re: Engine dies when in RES/ON
Post by Boofer on 07/13/11 at 00:00:12

It's ok to leave on if you trust your float needle. The Suzuki tank has two threaded holes to attach the petcock. Your tank is not stock according to the photo you showed us.