Carb rebuild new cables....

[weasel01]

I have really been enjoying my resurrected r65 but a couple nights ago at highway speed I noticed some roughness that wasnt there before.

When I got home I checked the diaphragms as I've seen this condition mentioned several times here.

Sure enough the left side has some damage.

So I ordered a rebuild kit from Bob's BMW and hopefully I will be rebuilding them this weekend.

Also order new cables (most expsive single purchase so far).

Any words of advice from you experienced ones?

I'm using bing diaphragms.

[Justin B.]

Well, it's too late now but next time order stuff like this from Moto-Bins!  On the cables just make sure you route the new ones back exactly is your old ones...  Have fun with the splitter!  

[Bob_Roller]

Oh, come on, the cable splitter is not that much of a big deal !!!!

The first couple of times I removed the cables from the bike, I taped a length of string onto the rest of the cable/wiring harness, just to be sure to get it right upon installation .

Remove the three cable assembly from the bike .

Thread the cable adjuster in all the way where the single cable goes into the splitter .

Next unscrew the threaded cap on the splitter, push the single cable in all the way you can, push down on the piece of plastic that the cable sits in, the single cable should be pushed out of it's detent to disengage it from the plastic 'plug', then move the single cable to the side through the slot in the plug and push it down out of the way, so it can't get hung up on the plug , then the plastic plug with the two cables that go to the carbs will come out .

[weasel01]

Thanks guys, I'm still mad a motobins for shorting me 2 gaskets on my timing chain kit.

Bob's had everything in stock ...ordered monday afternoon , just arrived via fedex.

[drgnfli]

I am also thinking of rebuilding my Bings (32 mm flat tops) and put it back on the bike.  Currently running two Mikunis VM32 Round Slide.
Anybody have any experience with Bing's Carb Kit?  Is it more expensive than Motobins, Max's  or any other dealer?

[weasel01]

My bike has the 32mm bing carbs and the rebuild kit was $74.00
for both carbs a buck or 2 more than just the diaphragms.

I received my cables today and hope the get my carb kit tomorrow
If I get it early enough I will try to post a picture.

The cables came with all new adjuster to screw into the carbs.

[montmil]

If not already in your shop, go ahead and build El Cheapo Grande manometer so you'll have it ready when it's time to synchronize the carbs after rebuild.

Visit Snowbum's carb rebuild and synch'ing articles for a look into the future. helpful. Call us if you get lost [smiley=thumbsup.gif]
http://bmwmotorcycletech.info/

Monte

[weasel01]

Cool, got my rebuild kit today.

Looks good and complete.

Will be tearing it down tonight!!

[montmil]

Cool, got my rebuild kit today... Will be tearing it down tonight!!

Take lots of digital images to aid in remembering where that little widget came from. Sketches. Sequence notes. Perhaps consider doing one Bing at a time so you'll always have a complete reference. You may find that the job will go quicker due to less mental stress... Ah jeez. Where did I get that o-ring from?

You'll have fun, Ampy.     Monte

[weasel01]

OK left carb cleaned / new orings  / gaskets /diaphragm.

Very straight forward.

All but 1 oring was mush... very deteriorated.

The oring on the choke lever looked good as new ...changed it anyway.

[weasel01]

got em both overhauled.

Mounted them and the ol' girl fired right up!!

Went out for an operating temperature building ride came back and went thru the carb sync procedure.

Balanced em' on the homemade manometer.

Went for another ride and this is what I notice.

The throttle resistance is 60% less no longer does it feel like it's divided into ranges now it's smooth and equal resistance top to bottom.

My acceleration is much more rapid and effortless ...before there was alot more "work" involved in taking off from a dead stop.

I was really dreading the cables but they were by far the easiest point of this weekends surgury.

[Justin B.]

Ah, the sweet satisfaction of a job well done - at considerable savings over the dealer!    That is, if you could even talk your local dealer into even letting it into the service bay...  :-/

[montmil]

You should also see a definite increase in fuel mileage after the carb overhauls. Post Bing rehabs, my '81 now pulls smoothly up to and beyond 80 mph. Would be no problem going faster but I began to scare myself and whoa'd up..     Monte

[weasel01]

I have been tweaking on these carbs here and there and have them almost perfect except for the slightest hesitation right off of idle?

The idle is perfect and the rest of the throttle range is smooth as silk?

What is the trick to eliminate that slight hesitation?

[Justin B.]

Maybe go a bit richer (equally on both sides) on the idle mixture screws.  What you are seeing is a flat spot between where the idle jets are in control and the mains take over.  Sometimes a bit richer idle adjustment will get you over this...