SuzukiSavage.com - 2009 S40 looses power after refill

kimpal

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2009 S40 looses power after refill
03/30/16 at 18:07:37

Hello,

Here is when it happens.
1. Bike is running fine. It reached almost empty tank. No problem so far.
2. I refill bike to full tank and go home - ride about 2 miles. Still no problem.
3. Next morning for first few miles it intermittently looses power .... even stops while at 25-30 miles speed.
4. After few hick-ups/power losses ... it runs fine again (about 1-2 miles of bumpy ride).
5. It runs fine till it reach empty tank and refilled.
6. It runs fine if it is refilled every 70 miles.

So Problem happens only when it is almost empty and refilled.

What can be the problem ? Dirt/Water -- How to drain the dirt out ?

Thanks !!

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2009 S40 looses power after refill Reply #1 - 03/30/16 at 18:13:22 Year model, miles. Stock petcock? I'm tempted to question the tank cap vent. A full tank develops low pressure more quickly than a low tank. Pop the cap and see how it acts. If it runs okay a while, then starts acting up, pop the gas cap, if it runs okay a while,then acts up... bingo.
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kimpal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 3	Re: 2009 S40 looses power after refill Reply #2 - 03/30/16 at 19:25:38 Thanks justin_o_guy2 !! Its 2009 S40. Next full tank, I will give your suggestion a try. -K
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18100 Camp Springs, Kentucky Gender:	Re: 2009 S40 looses power after refill Reply #3 - 03/31/16 at 04:09:07 Have you installed an inline fuel filter?
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kimpal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 3	Re: 2009 S40 looses power after refill Reply #4 - 03/31/16 at 09:39:05 Dave, No, I haven't installed inline filter. Is it worth it ? I read couple of posts and got lost as what is best. If its an easy job I can install it. Which one is the best? Thanks -K
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Dave

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Re: 2009 S40 looses power after refill
Reply #5 - 03/31/16 at 09:49:00

kimpal wrote on 03/31/16 at 09:39:05:

Dave,

No, I haven't installed inline filter.
Is it worth it ? -K

No....an inline filter is not recommended. They can cause "air lock" problems and cause the running symptoms you are currently having. The bike already has screens on the petcock, and another on the top of the needle valve seat.

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DesertRat Serious Thumper Offline I love rat bikes! Posts: 1569 Arizona	Re: 2009 S40 looses power after refill Reply #6 - 03/31/16 at 09:50:30 I have an inline filter installed: Duralast - FF2314DL
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justin_o_guy2

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Re: 2009 S40 looses power after refill
Reply #7 - 03/31/16 at 10:47:55

You've got one, working out, cool. The petcock has a screen.
It's, IMO, unnecessary, redundant, restrictive.
Has been shown to be problematic.
Considering the reported Symptoms, I would tend to lean away from the filter, I know, it doesn't have one, But, if it did, the Full tank has higher head pressure. And, the Full tank requires less change in fuel level to change the internal pressure.
I'm stuck on a vent..

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DesertRat Serious Thumper Offline I love rat bikes! Posts: 1569 Arizona	Re: 2009 S40 looses power after refill Reply #8 - 03/31/16 at 10:51:30 what IF I've removed the mesh screens?
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2009 S40 looses power after refill Reply #9 - 03/31/16 at 10:57:14 That's a different story, and, might I add, a Detail omitted from the post. And a not exactly inconsequential detail. You moved the filtration device. You can't say that you simply added one. Scraping a star off your chart.
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Dave

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Re: 2009 S40 looses power after refill
Reply #10 - 03/31/16 at 11:21:22

DesertRat wrote on 03/31/16 at 09:50:30:

I have an inline filter installed:

Some folks have used them without issue....others haven't and have had problems. The issue is that the plastic nipples on the filter are thick for strength, and it makes the hole that the fuel flows through very small and restrictive. Sometimes air bubbles get trapped in that small hole and won't let the fuel flow past (air lock).

The Tech Article is here......HondaLavis had one on his bike and it was working for short rides - then his bike started acting up on long rides....so he removed it. Other folks have also had problems with the filters and chased all kinds of ignition and electrical problems that didn't really exist.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1211846392/0

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2009 S40 looses power after refill Reply #11 - 03/31/16 at 11:25:37 DesertRat wrote on 03/31/16 at 10:51:30: what IF I've removed the mesh screens?
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DesertRat Serious Thumper Offline I love rat bikes! Posts: 1569 Arizona	Re: 2009 S40 looses power after refill Reply #12 - 03/31/16 at 11:37:37 meh ... MY filter install worked out okay for MY bike ... I ride a daily commute ... AND no issues ... others may have "issues" ... YMMV ...
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: 2009 S40 looses power after refill Reply #13 - 03/31/16 at 11:39:13 justin_o_guy2 wrote on 03/31/16 at 11:25:37: DesertRat wrote on 03/31/16 at 10:51:30: what IF I've removed the mesh screens? Clear that up.
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DesertRat

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Re: 2009 S40 looses power after refill
Reply #14 - 03/31/16 at 12:04:48

I'm running BOTH, did NOT remove the filter mesh on the petc0ck.

I was addressing the issue brought up that there's already a "filter/mesh" on the petc0ck. IF one were to remove the redundancy from the petc0ck (mesh), an external filter would be "okay" and necessary.

Mine works with BOTH installed. I don't care if others have "issues" with my setup, I found one that works in my situation and will continue to ride as is ... ain't skeered ... Wink

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