Slow speed surging
Close
    
    
Results 1 to 5 of 5
Like Tree8Likes
  • 2 Post By HobbitRider
  • 3 Post By littletommy
  • 2 Post By SportsterDoc
  • 1 Post By HobbitRider

Thread: Slow speed surging

  1. #1
    Member HobbitRider's Avatar
    Join Date
    Jun 2016
    Location
    Central Texas
    Posts
    38

    Slow speed surging

    My bike has started surging (engine revs faster and then slow) while holding the throttle in the same position ove level ground. What would cause something like that? I did set my valve clearance while the bike was down waiting for a chain, and hopefully I did that right. Also, the bike has been sitting quite a bit. Could it be a carb issue? Not much of a mechanic obviously, so appreciate any help.
    Ken and littletommy like this.
    2015 Triumph Tiger 800 XRx
    2009 Kawasaki KLR650
    2001 Yamaha TW200

  2. #2
    Super Moderator littletommy's Avatar
    Join Date
    Mar 2013
    Location
    Vacationing in the Bahama's
    Posts
    17,573
    Try some Lucas Deep Fuel System Cleaner or Seafoam...
    Tweaker, Ken and Peterb like this.
    1st John 1:9
    If we confess our sins, He is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.

    John 3:16
    For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

    John 3:17
    For God sent not his Son into the world to condemn the world; but that the world through him might be saved.

    Hidden Content <<<Click here. Hidden Content Hidden Content

  3. #3
    Senior Member SportsterDoc's Avatar
    Join Date
    Jan 2017
    Location
    Southern Nevada
    Posts
    1,077
    My first thought is carb: Vacuum leak or contaminated idle circuit.

    Is idle speed set to spec?
    littletommy and Ken like this.
    2014 Honda CB1100
    2018 Yamaha XT250
    2016 Moto Guzzi V7 II
    2017 Yamaha TW200
    2012 Triumph Bonneville
    2002 H-D Sportster 1200 Sport
    2003 H-D Sportster 883
    1976 Honda CB750F
    1975 Honda CB360
    1970 Yamaha CT1
    1972 Yamaha CT2
    1972 Yamaha AT2/CT2
    1970 Honda SL350
    1970 Honda CL350
    1967 Honda CL160
    1967 Honda CB160
    1962 Honda CA110

  4. Remove Advertisements
    TW200Forum.com
    Advertisements
     

  5. #4
    Member HobbitRider's Avatar
    Join Date
    Jun 2016
    Location
    Central Texas
    Posts
    38
    I think the idle is about right, but I will check it out. I have run some fuel system cleaner through it, but not those products. I have never had the carb off, and it does have about 10k miles on it now. Maybe a good cleaning is in order.
    Ken likes this.
    2015 Triumph Tiger 800 XRx
    2009 Kawasaki KLR650
    2001 Yamaha TW200

  6. #5
    Senior Member SportsterDoc's Avatar
    Join Date
    Jan 2017
    Location
    Southern Nevada
    Posts
    1,077
    Seafoam is a good product, but probably time for you to get intimate with your carb.
    2014 Honda CB1100
    2018 Yamaha XT250
    2016 Moto Guzzi V7 II
    2017 Yamaha TW200
    2012 Triumph Bonneville
    2002 H-D Sportster 1200 Sport
    2003 H-D Sportster 883
    1976 Honda CB750F
    1975 Honda CB360
    1970 Yamaha CT1
    1972 Yamaha CT2
    1972 Yamaha AT2/CT2
    1970 Honda SL350
    1970 Honda CL350
    1967 Honda CL160
    1967 Honda CB160
    1962 Honda CA110

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. High speed lag, not getting to top speed
    By jgaff in forum Technical Help
    Replies: 3
    Last Post: 05-11-2016, 11:03 PM
  2. Slow speed get-off
    By M4 EnthUZIast in forum Technical Help
    Replies: 10
    Last Post: 05-17-2015, 11:42 AM
  3. cold weather running, surging?
    By yogaman in forum Technical Help
    Replies: 1
    Last Post: 04-24-2015, 12:14 AM
  4. Surging at W.O.T.
    By bruisr in forum Technical Help
    Replies: 5
    Last Post: 10-07-2013, 11:20 AM
  5. slow load speed How can It speed it up?
    By jvt in forum Off-Topic
    Replies: 3
    Last Post: 07-26-2010, 10:34 PM