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Posted

I took my bike on a run after I had put everything back together, well maybe so because I do have a number of screws etc left over, and it appears that maybe my problem only exists at low RPM.

 

At somewhere between 2,500 & 3,000 it seemed to even out, so I suspect it may have something to do with the idle mixture.

 

Reading other posts I gather that it is necessary to drill out something that protects the idle mixture adjustment screw and would appreciate any additional information anyone could add, particularly anything that may have to do with what I could really screw up if I try to drill out this cover.

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Posted (edited)
I took my bike on a run after I had put everything back together, well maybe so because I do have a number of screws etc left over, and it appears that maybe my problem only exists at low RPM.

 

At somewhere between 2,500 & 3,000 it seemed to even out, so I suspect it may have something to do with the idle mixture.

 

Reading other posts I gather that it is necessary to drill out something that protects the idle mixture adjustment screw and would appreciate any additional information anyone could add, particularly anything that may have to do with what I could really screw up if I try to drill out this cover.

 

 

Attached below is a picture of a set of carbs. Just above the crossbar that the two black hoses are sticking out of there is a hole on the right carb. On the left carb there is a plug in this hole.

 

I believe yours will have a brass plug in the hole.

 

Don't drill very big, or deep. Hole size is just under 1/4" in the carb body. Mixture screw head is about 1" inset

 

Drill a hole large enough to get a wood screw started in. You can the grip the screw and work the plug out.

 

You do not have to plug holes when you are done adjusting.

 

Gary

Edited by dingy
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Posted

Well, fortunately I am a real expert when it comes to fixing motorcycles and therefore, with a little minor assistance from some other contributors on this forum, I have managed to resolve my problem, and my number 2 cylinder is now working fine.

 

That said, all jokes aside, the problem WAS the idle mixture.

 

After I was told how to do it, I found that the previous owner, or one of them, had already worked on adjusting the fuel mixture and had removed the plugs and the idle screw on the number 2 cylinder had been backed off about 6 turns, making the richness of the fuel mixture more than slightly too lean.

 

The one good thing that has come of this though is that I have learned more from this forum than I could have learned anywhere else and I certainly appreciate that.

 

Also, as suggested by some contributors, I have re-located the TCI and the pressure sensor to the area above the airbox and these can now be accessed without removing anything other than the false tank cover, and my own modification, ie bending the supports for the ignition coils slightly forward, and inserting the holding screws for the coils from the rear rather than the front, I can now replace a coil by removing only the battery box.

 

I certainly would like to thank everyone for the help and hopefully I will be able to return the favour some day.

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