Going to see/buy a R65.. What should I check?

[Adamastor]

Hmmm still about the headlight bracket... it doesnt look homebrew. The engine number is consistent with a R65T. I tried to google for it, but there's no info on this particular model...
Can you help me out sorting differences between regular R65 and R65t ?

Regards,

Sérgio

[Adamastor]

Ok, so here goes what I've done so far:

- valve clearances + rocker arm
- cleaned fuel tap (no fuel on normal position, now its ok)
- new brakes oil (got rid of the drag I felt)
- checked motor / gear / rear wheel oils

Tried to balance carbs (still didn't rebuilt them because they seem to be working ok). With this method: http://www.ibmwr.org/r-tech/airheads/parklotbalance.shtml (yes, I did this with a hot engine after 30km ride)

Got to this point:

- on right side, revs are higher with mixture screw all in. There must be a too rich situation here... If i put it 3/4 turn out it tends to backfire if I close throttle. With the screw all in, it seems to work +/- fine.
 The right side muffler is much more rotten than the left one (small hole near the passenger foot rest, you can feel hot fumes coming from there) - can this be the culprit for the over rich situation?
- Left mixture screw does no obvious rev fluctuation.
She can handle idle on 1200rpm, but not very stable. She pulls fine, starts fine and revs very well on the street / highway.

Left plug looks ok, right plug looks more black.

I know I should just order new mufflers and the carb rebuilding kits, but I want to ride it while I do the things to buy list...

Any opinions would be very appreciated...

[Bob_Roller]

I think your carbs need a bit of attention .

Sounds like there's a bit of debris in the idle mixture circuits of both carbs .

I would personally do the carb gasket and seal replacements .

[montmil]

Most definitely time to do a full overhaul on the Bings, top to bottom. The Clymer manual has the correct specs for all the jets, needles and assorted widgets you'll need. Buy the original Bing diaphragms and save yourself some aggravation. Read Snowbum's Bing overhaul technical info.   Monte

[Adamastor]

Hi there, I was wondering... I am used to Dellorto carburators for 2T engines, so I know nothing about these diaphragms and so.
Is there any online or PDF tutorial on how Bing carburators work? I like to know how they act

Regards

[montmil]

Read Snowbum's Bing overhaul technical info.

...Is there any online or PDF tutorial on how Bing carburators work? I like to know how they act...

Once more, with feeling...  

http://bmwmotorcycletech.info/

[Adamastor]

Oh... sorry (and thanks once again... i am still a bit lost in this world!)

[Adamastor]

Another report:

- There's an oil leak that seems to come from those robbers beneath the right cilinder:

To change these you do have to at least take the cylinder out, right?  :-?

I am starting to get the gears right, pre-loading makes a lot of difference and passing through neutral from 1st to 2nd makes it smooth and clunkless.

Now a silly question... is it safe to ride an airhead on city trafic? It's summer and I got my feet really hot....  

Regards,

Sergio

[Bob_Roller]

It's probably best to completely remove the cylinder, as there is a thin o-ring at the cylinder base, that should be replaced as well .

I ride my '81 R65 in Phoenix in the summer time, and as long as you keep moving it shouldn't be a problem, but if you are stopped for an extended period of time (5 minutes), I would shut the engine down .

Another thing to consider, is that the charging system is not working in these conditions, you are running the electrical system of the bike off of the battery .

[Adamastor]

A little update:

- new fork oil
- new gear oil (no metal seen on the magnetic plug, hurray!)
- removed slack from the gear lever (it was too loose)
- used some high temperature silicone to try to seal the "crack-o-matic" cracks.
Must do a home water test before ridding in the rain... (I know I should buy a new/better coil, but money doesnt stretch and this month I have already spent too much).

Now I am waiting for motobins to deliver me some goodies (overhaul kit for carburators, oil / air filters, new speedo cable, new sparkplug cables, etc etc) to finish the most important jobs

Regards,

Sergio

[montmil]

A little update: - used some high temperature silicone to try to seal the "crack-o-matic" cracks. Sergio

Unfortunately, Sergio, the cracks indicate that the primary and secondary windings are most likely corrupted. The silicone will do little or nothing to correct the internal issues. Even in the dry Texas heat, my '81 did not run smoothly until the coil was replaced.

Just ride on with a bit of a miss until you can replace the Bosch coil with the far better Dyna coil.

Monte

[Justin B.]

If the bike has sat for a while then those pushrod tube seals might seal back up with a bit of riding, if not then you have to decide how much "seepage" you are willing to put up with!

[Adamastor]

A little update: - used some high temperature silicone to try to seal the "crack-o-matic" cracks. Sergio

Unfortunately, Sergio, the cracks indicate that the primary and secondary windings are most likely corrupted. The silicone will do little or nothing to correct the internal issues. Even in the dry Texas heat, my '81 did not run smoothly until the coil was replaced.

Just ride on with a bit of a miss until you can replace the Bosch coil with the far better Dyna coil.

Monte

Hmmm.. that's disturbing.. but since it currently is running ok (hope the idle will be better after carb rebuild) I think I will try to run it with this bosh unit some more time.
Silicone is just something for the wet weather... if that was the culprit for my first trip with rain failure...

Justin, hope they seal up a bit... I am used to leaky bikes, but that's something I dont actually appreciate ehehehe

Regards..

[Lucky_Lou]

Do yourself a big favour get the carbs ultrasonically cleaned or you could be back to square one before you know it, and if the cleaning company ask for them stripped be sure to strip the enricher assembly and keep both carb bits separate, it may cost you 50 Euro but believe it will be the best 50 you spend on it.
Lou
ps i do hope you ordered the bing diapragms not generic!!!

[Adamastor]

Hi there once again...  surfing the web I saw this article:

http://www.slash5.net/org/Push%20rod%20seals.html

It seems it is possible to stop a small leak by tightening of the seal (without taking out the head + cylinder).

I just don't understand how this can be done, or how does that tool look... Is this thing possible?

Thanks in advance for any help here (once again)...