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D14/4 sport running problem
April 1, 2012
5:59 pm
mtwisleton
Club member 1462 Lytham
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Forum Posts: 25
Member Since:
October 11, 2011
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I have just done a complete nut and bolt restoration of D14/4 sport (1968).

I have a carburettor problem, I believe.  I have read all the other carb topics and none match and I have checked all the ideas presnted, but nothing has madea difference.

While standing on the centre stand, to start, you always have to flood the carb (hot or cold).  It will only run with the choke down and if lifted will stop. It will only run in the upper part of the rev range.   Occasonally, it suddenly revs out of control.  The plug is the correct colour

However, when off the stand and going in gear, it will work in the lower rev range, it chugs along, acceleration is poor.

 

I suspect a very weak mixture, but all carb joints have been checked and I have (even) bought a new carb). jets are recommeded sizes as are adjustment levels.

 

Any ideas or other possibilities?

Mike

D1 1953, D14/4 Sport
April 1, 2012
6:35 pm
Lone Wolf
Club Member 1657 The Black Country
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Forum Posts: 980
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January 24, 2012
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Wotcha.

 

The only thing that springs to my mind is either timing, or leaking crank seals.

^..^
April 1, 2012
9:22 pm
mtwisleton
Club member 1462 Lytham
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Forum Posts: 25
Member Since:
October 11, 2011
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Dear Lone wolf

thanks for this.  Leaking seals is what I feared.

Mike

D1 1953, D14/4 Sport
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