SuzukiSavage.com - 2003 Suzuki S40 Will Not Start

Brentr

YaBB Newbies

Offline

SuzukiSavage.com
Rocks!

Posts: 20

2003 Suzuki S40 Will Not Start
04/09/18 at 10:37:59

I have a 2003 Suzuki Boulevard S40 with ~70,000 miles that will not start.

I had been driving quite a ways (80 miles to work and back) a few times a month for about two months. I noticed it was going through oil pretty quickly, but no noticeable emission of it via smoke. Despite that, it ran fine.

Until last weekend; I warmed it up and took off. Initially, going down the street it died while coasting to the street light, so I restarted it and kept going. After continued riding, I noticed somewhat random hesitation and loss of power under load; not quite sputtering, but cut offs in power that increasing revs seemed to mitigate. I hopped onto a main thoroughfare and got to highway speed and cruised for a few miles, with everything seeming fine. After a few minutes, it started to hesitate again going up a slight hill and then died all together. I tried starting in neutral while coasting to a stop, to no avail. I pulled off to the side of the road and continued to try and start it, with no luck.

I’ve checked that the carb is getting fuel (it drains freely out of the drain screw) and the plug is sparking. Next weekend I plan on checking the compression, the phantom consumption of oil makes me fear bad rings.

Any ideas?

Back to top

IP Logged

Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2625 Amongst the Twisty Roads	Re: 2003 Suzuki S40 Will Not Start Reply #1 - 04/09/18 at 11:00:09 First off, welcome. Things I'd start with: - Fuel in the Oil (means a bad fuel thingy - very common) - Fouled Sparkplug (they can spark and still be fouled) - Blocked intake air passage/blocked/dirty airfilter - Failing regulator/Rectifier - Failing Stator
Back to top	A life-time student of motorcycling. LS650 Cafe, DRZ400SM, FZ6N, SV650S, CB900C, Ducati ST2, CB550F-SS My LS650=> http://suzukisavage.com/yabb2.2/Attachments/Left.JPG IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2003 Suzuki S40 Will Not Start Reply #2 - 04/09/18 at 13:53:50 Put it on Prime
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

Brentr

YaBB Newbies

Offline

SuzukiSavage.com
Rocks!

Posts: 20

Re: 2003 Suzuki S40 Will Not Start
Reply #3 - 04/09/18 at 14:15:28

I replaced the spark plug and have the petcock on prime, to no avail.

The old spark plug was pretty fouled, but it also had been a long time since it was replaced. Is there another way to confirm fuel in the oil?

I’ll check the air intake today.

How would I go about inspecting the regulator/stator for serviceability?

Thank you guys for the quick responses.

Back to top

IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2003 Suzuki S40 Will Not Start Reply #4 - 04/09/18 at 15:17:48 If battery voltage drops much with the starter running it's not gonna fire the plug. I don't remember the critical voltage. Have a Hot battery..
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

batman

Serious Thumper

Offline

SuzukiSavage.com
Rocks!

Posts: 3806
osceola new york
Gender: male

Re: 2003 Suzuki S40 Will Not Start
Reply #5 - 04/09/18 at 23:27:20

If the rings were bad you would have little compression ,and the bike might not have run, you would have black smoke out the tail pipe and you have none, the fact that the plug was fouled (if it was black/sooty) speaks instead of an over rich fuel mix. iIf you have a stock petcock your overdue for a Raptor petcock, if you've got a Raptor then you should be looking at the float valve and seat for wear on the tip of the valve ,cracked or damage to the O-ring on the outside of the seat ,or a plugged filter screen in the cavity above the seat, or fuel inside the float itself .
JOG, is referring to a voltage of about 10v when the starter is running ,if the battery voltage sags to that point you'll have no spark at the plug.
You can check your oil level in the sight glass the level going high or screwing off the oil filler cap and smelling gas instead of oil would tell you the carb is flooding .(a bad petcock or a float valve problem)

Back to top

my old work mates called me MacGyver

IP Logged

Brentr YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: 2003 Suzuki S40 Will Not Start Reply #6 - 04/10/18 at 15:02:28 The oil does smell of fuel, confirm suspicions of over rich air/fuel mixture. I have a stock petcock. You recommend the raptor petcock? Is that what is causing the presumed rich mixture? Also, I replaced and tested the spark plug, it is sparking.
Back to top	IP Logged

Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2625 Amongst the Twisty Roads	Re: 2003 Suzuki S40 Will Not Start Reply #7 - 04/10/18 at 17:32:44 The fuel in the oil is a cause of a bad fuel valve, it has nothing to do with the air:fuel ratio. The diaphragm in the fuel valve fails and fuel is able to move through the vacuum line in the carb directly to the cylinder. From there it passes the rings to the crankcase. Get a genuine Yamaha Raptor valve.
Back to top	A life-time student of motorcycling. LS650 Cafe, DRZ400SM, FZ6N, SV650S, CB900C, Ducati ST2, CB550F-SS My LS650=> http://suzukisavage.com/yabb2.2/Attachments/Left.JPG IP Logged

batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: 2003 Suzuki S40 Will Not Start Reply #8 - 04/10/18 at 18:03:22 Gas will not lubricate ,don't be running the bike until you change the petcock and the oil and filter. I'd also look at the air filter and drain the air box if needed. Your carb settings are OK ,the extra fuel is running down the vacuum line from the petcock ,drawn in by the motor , basically bypassing the carb.
Back to top	my old work mates called me MacGyver IP Logged

Brentr YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: 2003 Suzuki S40 Will Not Start Reply #9 - 04/10/18 at 18:06:13 Got it. Thank you, ordering the raptor petcock today. I’ll install and give you guys a heads up with the results.
Back to top	IP Logged

Yoshi Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 868 LongIsland, N.Y. Gender:	Re: 2003 Suzuki S40 Will Not Start Reply #10 - 04/12/18 at 12:39:01 Make sure to get a OEM replacement
Back to top	IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2003 Suzuki S40 Will Not Start Reply #11 - 04/13/18 at 11:41:45 Time for fresh oil.
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

Brentr YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: 2003 Suzuki S40 Will Not Start Reply #12 - 04/13/18 at 16:32:44 Replaced the petcock, plugged the vacuum outlet for the vacuum line on the carb, bike still won’t start. Any other ideas?
Back to top	IP Logged

Serowbot

YaBB Moderator
ModSquad

Offline

OK.... so what's the
speed of dark?

Posts: 28362
Tucson Az
Gender: male

Re: 2003 Suzuki S40 Will Not Start
Reply #13 - 04/13/18 at 16:44:07

Well,... replacing the petcock has saved you another headache down the road.
Extra oil consumption at extended highway speeds is not unusual. (Savages just gulp hard up there).

Have you checked your safety cut-outs?...
You can jumper them... Sidestand is under the seat, clutch at the hand lever.
They can cause weird intermittent gremlin behavior...

Back to top

Ludicrous Speed !... ... Huh

...

IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2003 Suzuki S40 Will Not Start Reply #14 - 04/13/18 at 17:28:37 What's the Battery Voltage WHILE The starter is running?
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged