Question about Yamaha XJ 900 S Diversion Motorcycles

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Motorcycle starts and runs with the choke on. when you try to turn the choke off it dies. what could be the problem or problems ?

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  • Yamaha Master
  • 19,396 Answers

Hi.


To start ensure that you have checked and replaced the air filter element. To replace the element you need to remove the fuel tank, then remove filter cover, held by three screws, and finally replace the filter, as in pictures below:

Filter cover:
motorcycle starts and runs with - bba7725.gif


If replacing air filter does not fix the problem, then you have to work on carburetor settings, first adjusting the throttle cable, then working on the carburettor synchronization.

The first part of the settings, adjusting the carburetor cable, is not a difficult operation, while synchronizing the carburettors requires experience and a good hear for the engine. I suggest to have this last operation done by a mechanic if necessary.

Here the whole procedure:

  1. Part 1 (throttle cable adjustment)
  2. Part 2 (synchronization A)
  3. Part 3 (Synch B).

Regards.

Posted on Feb 07, 2010

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Posted on Jan 02, 2017

  • 909 Answers

SOURCE: Will only run in full choke mode

Try a fuel additive to clean the system, also if the airfilter is dirty or damp, this can cause problems.
You may even have a rust problem in the barrels.
Or even the engine oil may have thickened causing a resistance in the crank bearings, so flush the engines oil ways if other solutions don't work.

Posted on Jun 18, 2009

  • 1 Answer

SOURCE: After being parked for about one to two months, I

put sea foam cleaner in the gas and run it

Posted on Jul 03, 2010

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Will only run in full choke mode


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Or even the engine oil may have thickened causing a resistance in the crank bearings, so flush the engines oil ways if other solutions don't work.

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