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Author Topic: carb help  (Read 1831 times)

tvrla

  • Guest
Re: carb help
« Reply #15 on: November 16, 2012, 09:07:17 PM »
I just re-read your first post.

Just to make sure I'm trackin with you ----

The bike was running fine.

You worked on the choke.

Now it isn't.

Is that the simplicity of the situation?

If so, I see two possibilities:

1. The sticky choke was masking a lean running condition.

2. Something got messed up working on the choke.

Sometimes the throttle cable or choke cable can get hung up on the outside of the adjuster. That'll really screw things up.

Are you sure there isn't water in the tank?

GrimReaper

  • Guest
Re: carb help
« Reply #16 on: November 16, 2012, 11:19:57 PM »
i think the cables are ok.the choke open and close properly.never thought of the idea of having water in the tank.
  Just check for air leak with spraying around the carb and the rubber hoses.it did not change the rpm at all.
  Whats the best way to see is there any water in the tank

Offline wilcom

  • Mt. Olympus Resident
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  • Posts: 1500
Re: carb help
« Reply #17 on: November 16, 2012, 11:55:21 PM »
Quote
Whats the best way to see is there any water in the tank  

Drop the bowls... you'll see the water in the fuel, they don't mix. Water is more dense than gasoline and will be in the bottom of the bowl. Kinda like bubbles that don't come to the surface.

If you wanted to rid yourself of any water in the tank you could pull the petcock and any water should flow out because it weighs more  and will be there at the bottom of the tank
« Last Edit: November 16, 2012, 11:58:21 PM by wilcom »
Joe Wilkerson
Telephone man with a splash of Data
Menifee, CA

Present:
1984 BMW R65LS "Herr Head"
past:
1982 BMW R65LS
1979 R65
1980 R65
1982 R80RT
1974 R90/6
1972 R75
1964 R50/2
19xx R27
ZX-11

Offline montmil

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Re: carb help
« Reply #18 on: November 17, 2012, 08:21:56 AM »
Regarding water in the R65 fuel tanks...

With only a single petcock, it's not possible to be assured that any H2O in the tank is completely drained when using the petcock while the tank is mounted. There is always some residual fuel -and possibly water- in the right side of the tank. That "hidden fuel reserve" can hold water, too.

Best option is to remove the tank and drain it completely. It's not necessary to attempt draining through the filler as the flange inside the filler neck prevents a complete drain. Just be sure to slosh the right side over to the left and -for best results- remove the petcock during the drain process.

BTW, that hidden fuel reserve can get you a few extra miles even when you've run the "reserve" dry. As you are already parked on the side of the road, tilt the bike and splash that last bit of dino fuel over to the left side. Hopefully, there won't be any water in the gas.

Water in your gearbox is often a result of a worn and cracked rubber speedo cable boot located where the cable enters the box. Replace the boot with a new one and pack the inside of the boot with grease just prior to snapping the boot onto the box.
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

GrimReaper

  • Guest
Re: carb help
« Reply #19 on: November 17, 2012, 11:12:46 AM »
Monte I have a dual petcock.I will check the bowls today.
 The carbs were rebuild a couple of years ago and synchronized after that
So I don't think a sticky choke has been hiding a lean condition.