Results 1 to 3 of 3

Thread: BMW R27 carb problems

  1. #1
    Registered User ripperfarms's Avatar
    Join Date
    Jul 2006
    Central IL

    BMW R27 carb problems

    I have a 1961 R27 I just bought receintly.

    It starts very hard when cold, usually I have to push it but after it warms up a little, as little as around one block, it starts good.

    But when I am riding it and stop it increases in speed when it is idling. It runs down the road great.

    I have had the Bing Carb apart two times. Everything looks good the slide spring seems good and the slide works good. I checked the throttle at the grip and it seems to be working good also. The last time I had it apart it put gas in the float bowl to see of the float would float and it seemed to do that also. I don't know these real good but I am learning. Thanks for any help.

  2. #2
    Registered User 37071's Avatar
    Join Date
    May 2004
    Petrolia ON

    Air Leak

    It seems possible to me that you have an air leak between the carb and the head. it is not uncommon for folks to overtighten the 2 nuts holding the carb on and bend the "ears" of the carb. This leak causes very hard starting. To fix it you can either _
    1 take the carb off and use a glassplate and grinding compound to make the mating surface flat again.
    2 take the carb off and put some soft gasket cement on the gasket/heat blocker on the studs - then put the carb back on.
    Hopefully this helps.

  3. #3
    Registered User MTHelmet's Avatar
    Join Date
    Mar 2003
    Danielsville, PA
    more info in profil.
    MT helmet

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts