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Help diagnosing a problem?

Discussion in 'Technical and Troubleshooting Torque' started by jimmyjames182, Nov 13, 2008.

  1. Having a problem with a honda cb250 2001 model.

    Starts and runs fine. When stopped say at the lights the bike will idle ok however if the bars are then turned toward left or right while stationary the idle drops down and bike cuts out.

    Otherwise the bike is good. Acceleration is smooth, no backfires. Plugs changed recently. Any thoughts or suggestions?
  2. Sounds like it could be the routing of your throttle cable around the front of the bike. When the handle bars are turning it may be pulling/relaxing the cable causing it to stall.
  3. Yep, sounds like it. You should be able to find a copy of your service manual which should include the correct cable routing. After it is done, you will most likely have to raise your idle speed to compensate.
  4. Also check your kill-switch wiring.

    It wouldn't be the first time the run-wire has broken inside the large harness at the head-stem.
  5. Even if the throttle cable is pushing, the throttle stop screw should prevent the idle from dropping any further.

    Try this. wind you idle stop screw up a little. if the revs don't rise then the cable must not be seated properly and then you will have to check why.

    If the idle does rise, then I'm guessing electrical connection to the right handlebar switch block.
  6. Ta for the replies - will see how I go.
  7. +1 :wink:
  8. The plot thickens.

    Did the front brakes yesterday and in the course of this moved the brake lines out of the brackets which keep them in check.

    Found the bike is no longer cutting out when bars turned to the left and right.

    Am wondering if it was as simple as a brake line choking off the throttle cable when the bars were turned?