Results 1 to 8 of 8

Thread: How to compression test R60 & R75

  1. #1
    Registered User
    Join Date
    Apr 2012
    Location
    Hudson Valley, NY
    Posts
    20

    Question How to compression test R60 & R75

    Sorry, but I haven't done a compression test in a zillion years, and that was on my old TR6. I tried a search but couldn't find anything....

    I have a 74 R60/6 with dyna electronic ignition. Do I have to ground the plug wires? Or do I just screw in the tester and turn the engine over with the starter button?
    and I'm going to look at a 74 R75/6 with points- same question: what is the procedure, do I have to ground the plug wires?
    Thanks so much-
    Kat

  2. #2
    Administrator 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    13,201
    Yes, I think it would be the best thing to pull the plugs, stick them back into the cap, and securely ground the plug threads to the engine. You should also pull the carbs or at a minimum prop open the slide and/or butterfly on the CV carbs. Not that difficult to just pull the carbs. Engine should have been warmed up.

    I have a gage with a rubber tip so I just stick in the hole and hold it while I crank the starter. But if you have a screw in adapter, just screw it in...finger tight is probably good enough.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Day Dreaming ... happy wanderer's Avatar
    Join Date
    Mar 2010
    Location
    Vancouver, B.C. Canada
    Posts
    1,974
    Make one of these with a good used plug. Throw it in your tool box. Comes in handy for testing, tuning and compression testing.



    In situ:

    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  4. #4
    Registered User
    Join Date
    Dec 2012
    Posts
    1,000
    Quote Originally Posted by happy wanderer View Post
    Make one of these with a good used plug. Throw it in your tool box. Comes in handy for testing, tuning and compression testing.



    In situ:

    This is one GREAT idea!!

    Thanks for it!

  5. #5
    Benchwrenching PGlaves's Avatar
    Join Date
    Oct 2003
    Location
    "Big Bend" TX
    Posts
    8,717
    Remove the carbs from the heads for the best test. Or at least hold the throttle plates wide open. If air can't get in, it can't be compressed.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://www.bigbend.net/users/glaves

  6. #6
    God? What god? roborider's Avatar
    Join Date
    May 2007
    Location
    Raleigh, NC
    Posts
    2,070
    Quote Originally Posted by happy wanderer View Post
    Make one of these with a good used plug. Throw it in your tool box. Comes in handy for testing, tuning and compression testing.
    Nice tool. Much better than the alligator clips I use. Nice post.
    Rob C. , Raleigh, NC
    '10 R12RT, R90/6
    2007 CBR600RR & 09 V-Star
    Suzuki DR 350

  7. #7
    Registered User grover1949's Avatar
    Join Date
    Apr 2012
    Location
    Findlay, Ohio
    Posts
    26

    Thanks!

    Awesome idea; thanks for sharing!

  8. #8
    Registered User
    Join Date
    Apr 2012
    Location
    Hudson Valley, NY
    Posts
    20
    nice! I'm going to try that out. Thanks!

Tags for this Thread

Posting Permissions

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