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Randall Washington, aka "Randakk"
President and Chief Executive Rider
Chapel Hill, NC USA

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Error in Official Honda GL1000 Shop Manual - Jetting Specs

Thankfully, the official Honda GL1000 Shop Manual is not riddled with errors like the Clymer manual, but there are two known "typos" in the Fuel System chapter of the Honda manual (at least in my copy which has a July, 1978 print date).

Honda made two mistakes in the chart printed on Page 9-2:

  1. '75 slow air jet (idle air jet) listed as #125....should be #110
  2. '77 secondary main fuel jet listed as #125....should be #120

More on GL1000 jetting specs here.

Below are my charts which show all of the correct specs.

GL1000 Carb Specs - US Market

"Early" GL1000 Carb Series

Year
Carb Code
Primary Main Fuel Jet
Secondary Main Fuel Jet
Idle Fuel Jet

Primary Air Jet

(Note 2 )

Secondary Air Jet

(Note 2 )

Idle Air Jet

(Note 1)
Idle Mixture Screw Initial Setting

OEM CV Needle ID#

(Note 4 )

Venturi Bore Diameter

(Note 3)
Float Setting
1975
755A
#65
#125
#35
#120
#60
#110
1 3/8 turns out
#302305
32 mm
21 mm
1976
758A
#62
#120
#35
#120
#60
#115
2 turns out
#302307
32 mm
21 mm
1976 LTD
763A
#62
#120
#35
#120
#60
#115
2 turns out
#302307
32 mm
21 mm
1977
764A
#62
#120
#35
#120
#60
#110
2 1/2 turns out
#452301
32 mm
21 mm

 

"Late" GL1000 Carb Series

Year
Carb Code
Primary Main Fuel Jet
Secondary Main Fuel Jet
Idle Fuel Jet

Primary Air Jet

(Note 2)

Secondary Air Jet

(Note 2)

Idle Air Jet

(Note 1)
Idle Mixture Screw Initial Setting

OEM CV Needle ID#

(Note 4)

Venturi Bore Diameter

(Note 3)
Float Setting
1978
769A
#60
#120
#35
#120
#60
#120
1 1/2 turns out
#452304
31 mm
21 mm
1978 (emissions controlled)
771A
#60
#120
#35
#140
#60
#130
Set at 2 turns out - then use "idle drop procedure" ... see manual
#452304
31 mm
21 mm
1979
771A
#60
#120
#35
#140
#60
#130
Set at 2 turns out - then use "idle drop procedure" ... see manual
#452304
31 mm
21 mm

 

Notes referenced above are here.

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