High compression, wont take throttle
Close
    
    
Results 1 to 5 of 5
  1. #1
    Senior Member mtkd's Avatar
    Join Date
    Feb 2012
    Location
    NY
    Posts
    215

    High compression, wont take throttle

    Now this sounds like a fuel problem right off the bat. I have cleaned the car multiple times and it is as clean as it can get.
    I have 190PSI compression (way too high)
    Valve lash is in spec, verified twice
    Fuel is good,
    New spark plug that does spark

    Bike turns over and will idle ok. Enrichner will raise idle. Turning the throttle kills the bike.

    Anyone have any ideas?
    -Szj



    2001 TW

  2. #2
    Super Moderator littletommy's Avatar
    Join Date
    Mar 2013
    Location
    Spokane, Washington
    Posts
    14,211
    I would double check the compression with another gauge first. Was the old plug black, fouled or rich? Were you running higher than 87 octane in it? Air filter clean and oiled? How about a half turn or more in on the mixture screw to see if it might have been too rich, and also trying the other way out on the screw to richen it if the plug hadn't looked to black and/or rich?
    Last edited by littletommy; 11-10-2013 at 04:05 PM.

  3. #3
    Senior Member PalmStateCrawler's Avatar
    Join Date
    Aug 2011
    Location
    Cayce, SC
    Posts
    3,109
    First off you need to find out why your compression is so high. Is the piston and head covered with carbon deposits? Are you sure that you are setting your valves correctly? Many people dont understand how to use feeler gauges. Did you install a high compression piston? You will only be band-aiding the problem until you figure out why the compression is so high.
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
    '86 BW80 farkled to size
    '10 TW200 you will be missed

  4. Remove Advertisements
    TW200Forum.com
    Advertisements
     

  5. #4
    Senior Member rurlndum's Avatar
    Join Date
    Jun 2013
    Posts
    451
    I am a firm believer in the k.i.s.s. (keep it simple stupid) principle.

    I think your carburetor slide is stuck.

  6. #5
    Senior Member mtkd's Avatar
    Join Date
    Feb 2012
    Location
    NY
    Posts
    215
    Quote Originally Posted by littletommy View Post
    I would double check the compression with another gauge first. Was the old plug black, fouled or rich? Were you running higher than 87 octane in it? Air filter clean and oiled? How about a half turn or more in on the mixture screw to see if it might have been too rich, and also trying the other way out on the screw to richen it if the plug hadn't looked to black and/or rich?
    The bike was running rich and the plug was brown black. This was a working gauge, and had been used earlier in the day and after I used it. Was running 87 octane.

    As for the air filter, that reminds me, there was a lot of engine oil in the air box and in the filter. Oil was clean. Have since tried to run it without the air filter.
    -Szj



    2001 TW

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: 15
    Last Post: 10-23-2013, 06:45 PM
  2. High Compression?
    By Boarder255 in forum Technical Help
    Replies: 9
    Last Post: 08-19-2013, 06:18 PM
  3. Compression check
    By elime in forum Technical Help
    Replies: 4
    Last Post: 04-29-2013, 06:13 PM
  4. Finding the Compression Ratio
    By ronnydog in forum Technical Help
    Replies: 6
    Last Post: 12-09-2012, 04:21 PM
  5. Compression Test
    By Henrici in forum Technical Help
    Replies: 11
    Last Post: 09-27-2010, 02:58 PM