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Seafoam & stalling...

Started by DirtyDuc, March 20, 2010, 09:10:33 AM

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DirtyDuc

March 20, 2010, 09:10:33 AM Last Edit: March 20, 2010, 09:43:26 AM by DirtyDuc
2000 M750 (12,608 miles)

So, got my bike out of a long winters storage.  I never got around to winterizing so I didn't use Sta-Bil before storing.  ...I know.  I am a bad Duc owner.

Battery dead.  Charged it.  Started, ran rough, needed choke on so it wouldn't stall.  It hesitated before acceleration. Etc.  I used 1/2 can of Seafoam.  After, now it starts RIGHT up and runs SUPER smooth.  There were NO problems with acceleration at all.  

Here's where it gets strange.  So, I rode it for about an hour then when no more then 10 mins from home, it stalled out of no where while I was riding in gear at a constant speed.  I pulled over & it started right up.  1/4 mile down the road, lost power but motor was still sputtering.  Puled clutch & pulled over.  It didn't stall, but started to die wen I rolled on the throttle.  After 30 seconds to a minute, all was normal again.

SO, my question is, do you think there is now crud just getting clogged in the jets?  What else could it be?  BTW, Plugs look good & fuel filter looks good.



Langanobob

#1
March 20, 2010, 12:54:22 PM
Sounds like my bike when I've managed to get some water in the fuel.  If you haven't already added fresh fuel, I'd try that.   

Howie

#2
March 20, 2010, 08:04:02 PM
And change the fuel filter.

MongoReturns

#3
March 21, 2010, 07:01:04 PM
Hey dude.  Sta-bil pushed my fuel pump (M750) over the edge - perhaps sea-foam did the same for yours.  If you've got a relatively new filter, check the plugs: dry = no fuel.  I changed my filter, thinking the sta-bil f'd it, but no go.

Fuel pump parts on the way for me ($20 shipped).  I'm 5 years past due for that anyway.

2000Monster750Dark: cored pipes, stage2, 43t, f-18, dptach
2007 1098Red: home depot cooler guard, on sale cluch cover, on sale dp dark tall screen, ebay hugger, hand painted clutch spring caps

ducpainter

#4
March 22, 2010, 03:58:27 AM
Quote from: MongoReturns on March 21, 2010, 07:01:04 PM
Hey dude.  Sta-bil pushed my fuel pump (M750) over the edge - perhaps sea-foam did the same for yours.  If you've got a relatively new filter, check the plugs: dry = no fuel.  I changed my filter, thinking the sta-bil f'd it, but no go.

Fuel pump parts on the way for me ($20 shipped).  I'm 5 years past due for that anyway.


Why do you think the Stabil hurt your fuel pump?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


DirtyDuc

#5
March 22, 2010, 04:01:39 AM
Plugs and filter were both replaced less then a 1,000 miles before storing for winter.  So, I guess it could still be clogged fuel filter (if there is crud the seafoam dislodged, etc.).

Fuel filter is relatively cheap, and can't hurt to change.  I'll run this tank to E then replace fuel filter & put new gas in.  Lets hope that works.

metallimonster

#6
March 22, 2010, 04:29:00 AM
I would just put some HEET in there and see if that helps.  Like Langanbob, is sounds like water in the gas to me.
Wherever I May Roam, Where I Lay My Head Is Home
02 620 Dark- High Mount CF Arrows

ducpainter

#7
March 22, 2010, 04:43:01 AM
Quote from: metallimonster on March 22, 2010, 04:29:00 AM
I would just put some HEET in there and see if that helps.  Like Langanbob, is sounds like water in the gas to me.
The danger with that is we have ethanol fuel in the states. If you add more ethanol it may remove the water, but our bikes are not jetted for the increased ethanol. It could cause running/power issues.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


MongoReturns

#8
March 22, 2010, 07:22:15 AM
Quote from: ducpainter on March 22, 2010, 03:58:27 AM
Why do you think the Stabil hurt your fuel pump?

I came across a post (probably here) where the sta-bil ate the pump's membrane.  Probably an old pump as well.  And it's the only thing that changed for my Monster - always started for 10 years, put that stuff in and suddeny no go.  I've really needed to rebuild the pump anyway - I know 10 yrs & 20k miles and more than pushing it.

On the plus side, I put the sta-bil in my sailboat tank (diesel) as part of winterization and it started right up yesterday, after sitting in freezing cold for 4 months.  Woohoo!  Hope it stays going.
2000Monster750Dark: cored pipes, stage2, 43t, f-18, dptach
2007 1098Red: home depot cooler guard, on sale cluch cover, on sale dp dark tall screen, ebay hugger, hand painted clutch spring caps

DirtyDuc

#9
March 22, 2010, 09:47:18 AM
Quote from: metallimonster on March 22, 2010, 04:29:00 AM
I would just put some HEET in there and see if that helps.  Like Langanbob, is sounds like water in the gas to me.

Shouldn't the Seafoam dry up any water in the tank?  The can says' so atleast.  I wouldn't be surprised if it did have some water in it.  But, don't want to keep addint too many different fuel addatives in at the same time. 

Plus ducpainter said not to [cheeky]

junior varsity

#10
March 22, 2010, 02:50:24 PM
sounds mysteriously similar to my problem, also a carbed bike.

ducpainter

#11
March 22, 2010, 02:57:59 PM
Quote from: ato memphis on March 22, 2010, 02:50:24 PM
sounds mysteriously similar to my problem, also a carbed bike.
I told you to treat your fuel ages ago. [laugh] [laugh]
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


junior varsity

#12
March 22, 2010, 02:58:49 PM
I know. Did it. No change for me. Even tracked down your fancy startrek blend.

ducpainter

#13
March 22, 2010, 03:03:00 PM
Quote from: ato memphis on March 22, 2010, 02:58:49 PM
I know. Did it. No change for me. Even tracked down your fancy startrek blend.
So...

what's the issue? [evil]

I haven't tried to start anything yet this spring.

I'll let you know if we've been duped. :P
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


junior varsity

#14
March 22, 2010, 03:12:18 PM
I'm eliminating lots of various things - pulled the carbs, gave 'em a good clean, blew 'em out, got ready to put 'em back on, and a friend who tinkers with cars says

"Y'know how you like gadgets and tinkering with your bike, you ought to get an A/F ratio monitor, it'll tell you what's going on in real time, great for tuning"

He's got me there. Pipes are off, bungs to be welded, then ceramic coated so its all uniform looking, and back on the go. With a sophisticated looking readout built under the tail, useful for this problem, and later dyno tinkering.

Also, new plug wires be on the way. and no more vacuum petcock. Intake manifolds are getting coated to match exhaust, so new intake manifold gaskets are going on.

That's being coupled with my new fuel pump, new fuel filter, new fuel, new fuel lines, and the fun of playing in my garage. This problem better sort itself out soon. I'm going to button it all back when the pipes are done (about a two week wait is my prediction) and see what happens. In the buttoning-up process, the vac-line to the fuel pump is going to be replaced and probably the vac-lines from the carbs as the big ones look pretty oooogly.

Hopefully, wheelying down the road with ear-to-ear grins.  If its none of the above, I'm swapping the Ignitech out for testing, and lastly, taking the time to test the coils once failure begins. My only remaining thought after all that would be investigating the wiring to the ignition pickup. There's only fuel, air, and spark required for combustion. If its not fuel, I figure its got to be spark trouble. Clearly, air is not all of a sudden moving to the far side of my garage and refusing to enter the intake.

If its still none of the above, I'm going to get some FCR41's, take the bike down to Jeff Nash and Stuart Rust, and say "tune me please, on ze dyno", and see what they come up with (both in #'s and in sol'ns)

A fairly robust plan. Other thoughts?
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