Bike won't rev- not fuel filter?? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 31 Old 10-04-2017, 10:48 PM Thread Starter
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Bike won't rev- not fuel filter??

Hi friends. K3 1k with 59,000 miles. I just replaced my rectifier with a series unit and placed my stator magnets in their proper positions (they had migrated). When I got it back together, it tested at the proper voltage, but it wouldn't rev to redline.

Per recommendations, I did the high pressure filter bypass/external filter mod. Fuel flow was unaffected from before to after. Bike felt great on the first ride to work post-mod, but on the way home the symptoms returned.

I then swapped my fuel filter/pump assembly with the pump from my buddy's crashed K3, removing the external filter since his bike's filter was in good shape and the pump was fine prior to his crash.

On the ride home from the swap, it felt perfect. On the next ride this morning, it felt great. The next time I turned it on for the ride home, the symposium had returned, to the point that it was hiccuping on the freeway at 4.5k rpm.

So- the problem appeared post-stator fix and rectifier swap, and persisted through two fuel pumps, one of which had the filter bypass done.

The max RPM varies- sometimes it will bounce off of 7.5k rpm, other times it bounces at 5-6k rpm.

I am lost. Anyone have any ideas?

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post #2 of 31 Old 10-04-2017, 11:44 PM
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Maybe the TPS.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #3 of 31 Old 10-05-2017, 05:11 AM
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Have you checked for dirt in fuel tank by rechecking the fuel flow. Pump may have been good was good when installed, but rust, etc could now have worked though to block the filters after your test ride, causing to run lean??? Also test for air leak or fuel tank breather pipe pinched???
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post #4 of 31 Old 10-05-2017, 03:39 PM Thread Starter
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Pat, the TPS checks out perfectly- tested it this morning. Last night at 2 AM I rode it home from my buddy's place, an 80 mile ride in 50-ish degree temps, and the bike felt nearly perfect again except at almost redline (it exhibited the symptoms at around 8500 RPM), so perhaps it's temperature related? I'll run a bunch more tests when I get home.

Question- electronics are my weak point in vehicle repair. Is it possible that the bike running at low voltage (it was at 12.4-ish when running previously) ruined the CDI/ECU/some other electrical component that could be causing this issue?

"Definitely do not sit on a DL1000. Big mistake. You'll end up buying one. Happened to me. True story."
-busarider54

"Purchasing a V-Strom from a Harley dealer does have poetic justice. Almost like removing a talented child from a meth house."
-ShortOnSkill

"I'm for moves that will help people get over the idea that it is ever okay to drink and drive."
-greywolf

Last edited by aTuWitty; 10-05-2017 at 03:59 PM.
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post #5 of 31 Old 10-05-2017, 05:18 PM
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There is no reliable test for the TPS. When it develops problems, they are intermittent and heat is a major factor. I would replace the TPS on any Strom that was over 5 years old that was having a problem not known to have a specific relation to another part.
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Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general-...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informat...-you-have.html
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post #6 of 31 Old 10-05-2017, 06:55 PM
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Replace it.....it's cheap insurance and possibly the fix.

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post #7 of 31 Old 10-05-2017, 08:20 PM Thread Starter
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The TPS is brand new as of 10,000 miles and one year ago, though... I guess I could just swap it for the one on my buddy's bike to test it.

What I don't understand is why this was not an issue at all before I replaced the R/R unit and fixed my stator magnets (and believe me, I played with the upper RPM range quite a bit). I know the simple answer is "you must have done something wrong with the install", but the voltage immediately jumped up to mid 14s after the work was done, where it was mid 12s before I did those things.

"Definitely do not sit on a DL1000. Big mistake. You'll end up buying one. Happened to me. True story."
-busarider54

"Purchasing a V-Strom from a Harley dealer does have poetic justice. Almost like removing a talented child from a meth house."
-ShortOnSkill

"I'm for moves that will help people get over the idea that it is ever okay to drink and drive."
-greywolf
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post #8 of 31 Old 10-05-2017, 08:24 PM
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It's unlikely to be the TPS then.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general-...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informat...-you-have.html

Last edited by greywolf; 10-30-2017 at 01:17 PM.
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post #9 of 31 Old 10-12-2017, 11:38 PM
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The only thing I can think of is the crank sensor that lives next to the stator.

Purely a WAG, but I'd cast a beady, skeptical eye on this wiring and the connector. Anything pinched, corroded, or otherwise doofy? Maybe even take the stator cover off and make sure everything's OK with this little guy, wires are routed correctly and unpinched, no magnetic schmoo stuck to the sensor, etc.

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post #10 of 31 Old 10-20-2017, 02:47 AM
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Has a solution been found wrt the bike won't rev?
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