Compression Test
Close
    
    
Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    Senior Member Henrici's Avatar
    Join Date
    Sep 2010
    Location
    Big Island, HI
    Posts
    180
    Hello what number should I be looking for if I compression test my TW?

  2. #2
    Senior Member Rainman's Avatar
    Join Date
    Jul 2010
    Location
    Ephrata, WA
    Posts
    1,125


    If you can't find it, grind it

    1990 TW200

  3. #3
    Senior Member Henrici's Avatar
    Join Date
    Sep 2010
    Location
    Big Island, HI
    Posts
    180
    Thanks for the information. I bought a compressions tester and it only is reading 60psi. This is the first and only time I've used it. I ride my bike everyday and haven't noticed a drop in performance. If the compression is that low (half the recommended minimum) would I notice a difference or is the gauge more likely incorrect? Thanks for any help!!

  4. Remove Advertisements
    TW200Forum.com
    Advertisements
     

  5. #4
    Member sakogu's Avatar
    Join Date
    Jul 2010
    Location
    Penticton, BC, CANADA
    Posts
    64
    just checking you had the starter cranking for several seconds with a nice full battery? most wont get full psi on first or second cycle

  6. #5
    Member sakogu's Avatar
    Join Date
    Jul 2010
    Location
    Penticton, BC, CANADA
    Posts
    64
    cut out, sorry double posted...

  7. #6
    Senior Member uktw125's Avatar
    Join Date
    Jul 2010
    Location
    Devon, England.
    Posts
    614
    Quote Originally Posted by Henrici View Post
    Thanks for the information. I bought a compressions tester and it only is reading 60psi. This is the first and only time I've used it. I ride my bike everyday and haven't noticed a drop in performance. If the compression is that low (half the recommended minimum) would I notice a difference or is the gauge more likely incorrect? Thanks for any help!!


    I hope I'm not teaching Granny to suck eggs here, but to get a correct reading the engine should be warm and the throttle wide open. If you have a CV carb you will have to remove it as the slide only opens when there is a vacuum in the manifold.



    I hope that helps you.

  8. #7
    Senior Member Henrici's Avatar
    Join Date
    Sep 2010
    Location
    Big Island, HI
    Posts
    180
    I did it with the engine cold and hot, full and closed throttle and got the same 60psi reading. My TW is a 2007 not sure if it has a CV carb or frankly what that is. Thanks.

  9. #8
    Senior Member Henrici's Avatar
    Join Date
    Sep 2010
    Location
    Big Island, HI
    Posts
    180
    Oh maybe I should add that I bought the compression gauge for a truck but thought I'd test it on the TW because I thought at least it was is good running condition....

  10. #9
    Senior Member uktw125's Avatar
    Join Date
    Jul 2010
    Location
    Devon, England.
    Posts
    614
    Quote Originally Posted by Henrici View Post
    I did it with the engine cold and hot, full and closed throttle and got the same 60psi reading. My TW is a 2007 not sure if it has a CV carb or frankly what that is. Thanks.


    2007 has a CV (constant velocity) carb. This type of carb relies on a vacuum on the intake side of things to lift the throttle slide so when the engine is not running i.e when doing a compression test the slide does not open.



    But as you say the bike runs fine then maybe your tester is not working properly.

  11. #10
    Senior Member Henrici's Avatar
    Join Date
    Sep 2010
    Location
    Big Island, HI
    Posts
    180
    Quote Originally Posted by uktw125 View Post
    2007 has a CV (constant velocity) carb. This type of carb relies on a vacuum on the intake side of things to lift the throttle slide so when the engine is not running i.e when doing a compression test the slide does not open.




    So would I need to detach my carb. to get an accurate reading?

Page 1 of 2 12 LastLast

Sponosred Links

Posting Permissions

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

Similar Threads

  1. What should engine compression be at?
    By Beewerks in forum Technical Help
    Replies: 17
    Last Post: 07-15-2017, 10:40 AM
  2. Compression check
    By elime in forum Technical Help
    Replies: 4
    Last Post: 04-29-2013, 06:13 PM
  3. Engine loses compression when warm
    By Uwdlk2no2 in forum Technical Help
    Replies: 37
    Last Post: 04-22-2013, 07:20 PM
  4. Finding the Compression Ratio
    By ronnydog in forum Technical Help
    Replies: 6
    Last Post: 12-09-2012, 04:21 PM

Search tags for this page

2000 tamaha tw200 compression
,

compression for a tw 200

,

compression test for yamaha tw200

,

how much compression dose a yamaha tw200 have

,
how to do a compression test tw200
,

tw200 compression

,

tw200 compression test

,
tw200 compression test tw200forum
,

tw200 resonable compresion

,

tw200 yamaha compression

,
what size compression tester adapter for yamaha tw200
,

yamaha tw200 compression

Click on a term to search for related topics.