SHERCO Carb Jetting Instruction Manual
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Sherco Carb Jetting
Instructions
This manual provides instructions on how to remove and reinstall the
stock carburetor, it also shows you how to change the pilot jet and
the main jet. It is intended to be used for all Sherco 1.25 – 2.9 Trials
Motorcycles.
The motorcycle shown is a new 2002, 2.9, the one that you are
working on may be slightly different but the principles shown will
apply to all of the models indicated.
The technician shown in the photographs is David Chaves who
received his training at the Sherco factory in Spain. David is also a
member of Team Sherco and is competing in the NATC national
series as a Champ rider.
The stock jets are: Pilot 30 – 33, Main 124 – 126.
Sherco USA recommends a 36 pilot and a 118 main for most North
American applications. Altitude, temperature and atmospheric
conditions all have an effect on carburetion. Your local dealer should
be able to advise you as to the best jetting for your area.
The float height should be set at 18.5mm.
If you have any question or are not certain about any procedure call
Ryan Young Products on 1-800-607-8742.
1/15/2004 Sherco Carb Jetting 1
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The First Step is to Remove the Rear Fender.
Remove the 2 rear fender mounting bolts.
Remove the front mounting
bolt.
1/15/2004 Sherco Carb Jetting 2
Disconnect the taillight
harness.
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The Second Step is to Remove the Fuel Tank
Remove the top fuel tank mounting bolt and disconnect the
fuel overflow line and the fuel line.
Remove the airbox by removing the 3 mounting screws.
1/15/2004 Sherco Carb Jetting 3
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Air Box Removal Continued
Notice that David is loosening the rear clamp, the
one that attaches the air box to the rubber manifold.
Do not loosen the clamp that attaches the rubber
manifold to the carburetor.
1/15/2004 Sherco Carb Jetting 4
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To facilitate the removal of the air box remove the
fender retaining nut.
Remove the air box
and set it aside.
1/15/2004 Sherco Carb Jetting 5
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Slide Removal
Loosen the 2 screws that retain the carb slide,
remove it and set it aside.
David hangs it over the side of the frame as shown.
1/15/2004 Sherco Carb Jetting 6
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