The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: GrimReaper on November 08, 2012, 11:00:12 PM
-
Today i noticed that my right carbs choke was stuck.So i removed the carb,took the choke out,cleaned it,put it back(in right position)and installed the carb(i did not took the cables out,just twisted the carb.Now the bike runs different,especially on decelerating.It feels like i am running out of gas.
What can be the reason for that?
Tnx
-
the choke might be upside down, example of turning it 180 degrees before putting the lever clip on, try that and see if it works, if not then you will have to pull the choke again
-
Session,the choke is installed right.The bike starts,idle and accelerate good.The problem is mainly in decelerating.and the bike sounds more noisy.
-
like bubbling?
-
Could the choke gasket or O ring be leaking air into the carb. Or could the carb to head rubber be leaking air in after being disturbed ?
-
All good suggestions for you, Sin. Check / confirm each one.
If carb removal and the enrichener hardware is the only thing you messed with, the problem is there. Resist the idea to make any other tweaks on the carbs/engine until you get this one issue resolved.
There is also a dot on the shaft of the enrichener valve which must point toward the lever that is installed on the shaft.
Luck to ya ;)
-
Did you disassemble the choke assembly, or just spray it with carb cleaner to clean it out ?
-
Bob,I disassembled it.It should be a gasket,I think.is it too bad to ride the bike in this condition,since there is probably a more lean condition on this side than the other
-
Just a note for the next time you clean the choke disc assembly, you don't need to disassemble it, unless you are replacing the o-ring on the shaft .
The thin brass plate on the back side of the disc, is spring loaded, you can get it about an eighth on an inch from the aluminum part and make sure the holes in the aluminum disc are open .
Did you make any note or take any pictures of the position of the brass shaft that the two part arm assembly is secured to, as Monte has mentioned, there is a dot from a center punch on the end of the shaft it needs to be in the correct position .
If you can get to the carb, where is the dot located when the choke is off ?
If the gasket doesn't help the situation, you may need to disassemble the choke assembly and rotate it 180 degrees and reassemble it .
I just rebuilt both carbs on my '82 LS last week and I took a few pictures before disassembling the chokes, I deleted them two days ago !!!!!
-
We have choke orientation pictures in the FAQ section.
http://www.bmwr65.org/cgi-bin/yabb2/YaBB.pl?num=1291933920
-
Great link Barry, didn't remember it was there .
One thing that is mentioned in the Bing manual, is to use an anti-seize compound on all of the screws that thread into the aluminum carb body .
They will be easier to get out next time .
Just a note here for US members, the screws that hold the tops of the carbs on, the metric thread (not sure what the dimensions are) and the US fastener size 10-32 (.188 in. x 32 threads per in.) are the same size .
-
I was following the link when I put it back together.I will put new gasket and o-ring next week
-
Any idea how long the choke was sticking open?
Is it possible the last time the carbs were tuned, it was done over that rich condition?
-
Any idea how long the choke was sticking open?
Is it possible the last time the carbs were tuned, it was done over that rich condition?
I went on vacation for a month in September.Before that the bike ran flawless.During the vacation there has been very heavy rain in vegas a few times.When i came back i found a sticking choke and a water in the tranny >:(
Is there any way to check for a air leak with spraying something around the carb
-
Is there any way to check for a air leak with spraying something around the carb
Spray any highly volatile flammable solvent around the carb inlet joints. If the revs rise momentarily that indicates an air leak.
Worth also spraying around the enricher to check if the either the cover gasket or spindle O ring are leaking air.
-
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?
-
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
-
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
-
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 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.