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Display Mesage #95359


Engine cutting out--AGAIN
Written by gibinmich on 7/27/2010 at 06:27 pm

I think Wolfgang hit the nail on the head. Its starving for gas, but because of
what? The fuel filter and petcock would be the easiest things to check first.
Just curious, how many miles on the bike?

--- In ipcrc@yahoogroups.com, Wolfgang Kaufmann <pc800@...> wrote:
>
> My bet is that it has something to do with the engine getting short of
> fuel when being revved that high.
> I think it needs more fuel than the fuel system (fuel
> filter/pump/petcock/carb) is able to deliver when the throttle is opened
> wide....
> As soon as you close the throttle a bit the fuel systen catches up and
> the engine recovers...
> What exactly the culprit is, is due to further investigation....
>
>
> --
> Regards,
>
> Wolfgang Kaufmann (Austria/Europe),
> iPCRC # 634
> in order of purchase :
> PC800 `90, "Mazda Baby", 89 K miles (1992)
> PC800 `96, still unnamed, 15 K miles (2000)
> PC800 `90, "Harlequin", 53 K miles (2002 - completely restored project bike)
> new in my stable:
> PC800 `96, still unnamed, 9 K miles (2006)
> PC800 `89 - nice little miniature (2007) ! (does this count too ??) ;-)
> http://tinyurl.com/2fokje
> http://www.mtc81.at/pc800.htm (in German language)
> http://tinyurl.com/ysqcqp
>
>
>
>
> emmettmarrone schrieb:
> > Hi again,
> > I drove to work last night and while running at about 5k rpm it happened
again, twice. I was able to recover the engine by pulling in the clutch,
letting the engine slow down for 5-8 seconds then revving the engine three short
revs then letting the clutch out. It was almost like I cleared the carbs or
something. Still a mystery, hopefully tomorrow will clean K&N air filter and
check the carbs( I have no idea what to do to them) and maybe change the oil.
It almost seems like when under load something happens and I correct it by
pulling in the clutch, free wheel for seconds and then restart.
> > Thanks for all suggestions.
> > Emmett
> > '90 PC800
> >
>

Message Thread for message #95359

emmettmarrone
7/26/2010, 08:19 am
Engine cutting out--AGAIN
Hi again, I drove to work last night and while running at about 5k rpm it happened again, twice. I was able to recover the engine by pulling in the clutch, letting the engine slow down for 5-8 seconds then revving the engine three short revs

    douglasvanb
    7/27/2010, 06:36 am
    Engine cutting out--AGAIN
    That sounds so much like what is happening with mine but without a steep hill being involved. I'm interested to learn what you find as the source of the problem. Cheers, Douglas --- In

    pgboyd
    7/27/2010, 10:21 am
    Engine cutting out--AGAIN
    Emmett, I don't recall what has already been recommended but some things to consider: Sidestand switch may be cutting out on you sporadically. Easy to check and replace if that is the problem. Bad fuel or tank trash may have some s

    wkaufmann2000
    7/27/2010, 05:39 pm
    Engine cutting out--AGAIN
    My bet is that it has something to do with the engine getting short of fuel when being revved that high. I think it needs more fuel than the fuel system (fuel filter/pump/petcock/carb) is able to deliver when the throttle is opened wide...

      gibinmich
      7/27/2010, 06:27 pm
      Engine cutting out--AGAIN
      I think Wolfgang hit the nail on the head. Its starving for gas, but because of what? The fuel filter and petcock would be the easiest things to check first. Just curious, how many miles on the bike? --- In

        obijuanak
        7/27/2010, 06:41 pm
        Engine cutting out--AGAIN
        On Jul 27, 2010, at 10:27 , Gib wrote: > I think Wolfgang hit the nail on the head. Its starving for gas, but because of what? The fuel filter and petcock would be the easiest things to check first. Just curious, how many miles on

    radamec123
    7/27/2010, 06:47 pm
    Engine cutting out--AGAIN
    Hi, I'm wondering if you have issues with your gas cap? Do you notice when you go to get gas that there's a lot of air suction when you take the cap off? There's supposed to be some type of venting, etc., and I'm not sure what that inc

    blitzzingers
    7/28/2010, 02:17 am
    Engine cutting out--AGAIN
    Emmett, I had this same problem this past spring. It is your Fuel petcock . you will have to remove your top shelter to get to it. the quick fix that many have done it to replace the petcock with a Tee. you can get one at you local auto su

      pc800dork
      7/28/2010, 03:14 am
      Engine cutting out--AGAIN
      That's weird. I have had the Tee-mod on my bike since shortly after I got it and don't recall ever really having a backfire except once when I started it. I noticed no change whatsoever in running the Tee. Can you describe how the Tee mig

      emmettmarrone
      7/28/2010, 05:55 am
      Engine cutting out--AGAIN
      First I'd like to thank all those who replied. I looked at all the suggestions and did the following. The oil needed changinf so did that with Delvac15/40 and new Honda filter, then I took off the shelter and cleaned and re-oiled my K&N a

    motorcyclema...
    7/28/2010, 09:04 pm
    Engine cutting out--AGAIN
    Juan wrote: > This also happens when the fuel tank is not venting properly to > atmosphere. The pump creates a vacuum in the tank causing the same > effect. Once the tank equalizes then fuel flows normally again. > >