Search:

Type: Posts; User: Dave Backmarker; Keyword(s):

Page 1 of 2 1 2

Search: Search took 0.07 seconds.

  1. And brings to avoid

    Rick,
    Great comments above on what to use. For things to avoid, top of the list is sand blasting. Even soda blasting is ill advised on any parts that may come in contact with engine internals.
    ...
  2. Replies
    19
    Views
    1,526

    yes, try test the coils

    Coils can be temperature sensitive. You can check the resistance of the coils (of course disconnected). Anton has a good article on his web site:

    http://www.largiader.com/articles/ignition/
    ...
  3. Replies
    10
    Views
    549

    Shifter seals

    There are two seals around the shifter, both can be changed by tilting the bike at an angle and removing the shifter and then extracting the two seals. After the seals are replaced, the allen should...
  4. Replies
    36
    Views
    1,911

    Agree only with progressive springs

    Kurt,
    I absolutely agree. I wasn't clear. The spring rate changes with compression only with a progressive spring. Thanks for adding the clarification here.

    DaveM
    1975 R90S
    2000 R1100RT
  5. Replies
    36
    Views
    1,911

    Spacers do affect loading on progressive springs

    Maybe my Bachelors of Science in Mechanical engineering may help. For springs, force is proportional to the distance the spring is displaced. The force times a spring constant (K) equals the...
  6. Replies
    13
    Views
    1,740

    Transmission rebuild

    Graham, Suggest you look at http://www.cycleworks.net Dan offers bearings, tools and a video that includes fantastic tips on rebuilding an airhead transmission. I've rebuilt my R90S transmission...
  7. Replies
    131
    Views
    13,280

    Maybe a leak down and compression test once the heads are back home?

    Kurt, May I suggest you do a compression and leak down test once you have the heads back to determine what you might need to do with the cylinders? I rebuilt my 1975 R90S (valve job done...
  8. Replies
    7
    Views
    5,077

    Rebuilding Dellortos

    Kurt,
    I rebuilt the Dellorto's on my 1975 R90S with rebuild kits from Bevel Heaven in California. Steve at Bevel Heaven also carries beautiful billet "bolts" for the bottom of the float bowls. I...
  9. Replies
    32
    Views
    2,617

    loosening those tight bolts

    +1 on heat. I like the idea of the heat gun because it's likely that there is BMW thread-lock you are trying to warm up. I also use thread penetrating oil like Liquid Wrench. Obviously, this can...
  10. one more thing to check

    Scottie, There are many great comments here and I'm sure you'll find the root cause. One item was to check the drive shaft. On my 1975 R90S, I removed the swing arm from the final drive and...
  11. Replies
    812
    Views
    156,255

    Sticky: Practicing posting a photo

    R1100RT wiring harness replacement
  12. Replies
    13
    Views
    835

    buzz buzz...hmmm

    Mike,
    Good recommendations above.

    After you check the coils...

    After a riding up to speed for a bit, is one head hotter than the other? I'm thinking along the lines of synching the carbs or...
  13. Replies
    11
    Views
    2,018

    Success!

    This was a long project (I purchased a used 5 speed transmission while I was refreshing the R90S's transmission). The refreshed transmission is back in the bike with RS intermediate shaft and 1st,...
  14. Replies
    7
    Views
    1,145

    Final Drive leak

    I've just discovered the same problem on my R90S. I picked up a seal and a tool from Cycleworks.net that will allow me to tighten the nut to spec.

    DaveM
    1975 R90S
    2000 R1100RT
  15. Replies
    13
    Views
    1,401

    Clutch seal?

    You mentioned the clutch is slipping in 4th and 5th. A slipping clutch will normally start to slip in high gears. The main seal in the transmission is a Viton or similiar material around metal. ...
  16. Replies
    6
    Views
    1,047

    GL4 instead of GL5

    Some of the gentlemen on Boxerworks forum feel that a GL5 hypoid can damage some of the bushings in the transmission (bronze?). They insist on a SAE 85W90 API/GL-4. I've found some and have it in...
  17. Coil source

    +1 on Motorrad Elektrik. I've replaced my coils from Rick and they work beautifully.

    You mentioned you were going to check your coils. I assume you were going to check the internal resistance...
  18. Its easy with the right tool

    I have no affiliation with Dan at Cycleworks other than being a huge fan and customer of his. Check out http://www.cycleworks.net Look for the steering bearing removal tool. My brother and I used...
  19. Replies
    22
    Views
    1,817

    Rough idle on R90S

    Jon,
    What was the indication on the plugs that the engine was running rich? Was one plug wet? I miss gas with lead that provided a great range of colors but with unleaded, there is very little...
  20. Replies
    20
    Views
    1,302

    Another way to check for a damaged battery

    HS,
    As mentioned above, excellent recommendations above.

    If the battery isn't a sealed unit (so many are these days), you can pick up a cheap hygrometer at a local auto parts store and measure...
  21. Replies
    12
    Views
    1,333

    Oil seapage

    HH,
    Good recommendations above. I've owned a number of airheads including an R80RT and I would approach the leak like this:
    1. Verify I'm using the correct weight oil and that the oil level is...
  22. Replies
    59
    Views
    7,317

    Transmission removal

    Great advice above, especially from Greg. I just pulled the transmission on my R90S so this is fresh in my mind.

    One other suggestion: Take a LOT of photos of each step to help you remember...
  23. Replies
    11
    Views
    2,018

    1st to 2nd shift

    Anton,
    You hit my biggest concern. If I've got this correct, the change in the gear on the intermediate shaft requires a 5 mm reduction in diameter for 2nd gear. That would result in a change in...
  24. Replies
    11
    Views
    2,018

    sport cluster

    Anton,
    I did not order the sport cluster deliberately. I incorrectly thought there was only one 15 degree version. I have spoken to Bob's BMW today and we agreed that I could press off the one...
  25. Replies
    11
    Views
    2,018

    Only one dog missing? :)

    BarryG,
    My son frequently rides this bike so I'm determined to fix it even if its probably okay. The bike has only 17K miles on it but it sat for over 15 years so to refresh it I've replaced...
Results 1 to 25 of 49
Page 1 of 2 1 2