Gregory Bender

Cylinder head comparison

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

Author: Rolf Halvorsen

Created:

Updated:

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Thanks to Rolf Halvorsen for this very detailed comparison of the early cylinder heads. I've added the 0.1a column to reflect the A-series Ambassador cylinder head.

Series0.10.1a1.11.21.31.41.52.12.22.33.14.1
Cooling fin shapeAll cooling ribs with V shaped form in spark plug area.All cooling ribs with V shaped form in spark plug area.All cooling ribs with V shaped form in spark plug area.All cooling ribs with V shaped form in spark plug area.All cooling ribs with V shaped form in spark plug area.All cooling ribs with V shaped form in spark plug area.The top two cooling ribs have a flat shape in spark plug area.The top two upper cooling ribs have a U shaped form in the spark plug area.The top two upper cooling ribs have a U shaped form in the spark plug area.The top two upper cooling ribs have a U shaped form in the spark plug area.The top two cooling ribs have a flat shape in spark plug area.The top two cooling ribs have a flat shape in spark plug area.
Area for the push rodsShallowShallowShallowShallowShallowShallowShallowDeepDeepDeepDeepDeep
Is the Moto Guzzi part number stamped on the cylinder head?NoNoNoNoNoNoNoYesYesYesYesYes
Notes regarding the center position screwNo threads for center position screw.No threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.Threads for center position screw.2 mounting bolts instead of threads for the exhaust pipe.
Is there a GUZZI stamping on the cylinder head?NoNoNoYesYesYesYesYesNoNoNoNo
Moto Guzzi part number for the right cylinder headMG# 12022100 MG# 13022100MG# 13022100MG# 13022100MG# 14023500MG# 14023500 MG# 14023502MG# 13022160MG# 13022160MG# 11021163
Moto Guzzi part number for the left cylinder headMG# 12022200 MG# 13022200MG# 13022200MG# 13022200MG# 14023600MG# 14023600 MG# 14023602MG# 13022260MG# 13022260MG# 11021263
Alternative Moto Guzzi part number for the right cylinder     MG# 14022100  MG# 13022100  MG# 14022101
Alternative Moto Guzzi part number for the left cylinder     MG# 14022200  MG# 13022200  MG# 14022201
Rolf part number notes     MG# 13022260 (left) MG# 12022201 (left)    
Number of valve springs112222212222
Intake valve sizeØ 38.5 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mmØ 41 mm
Exhaust valve sizeØ 34.5 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mmØ 36 mm
Inlet port sizeØ 37 mmØ 37 mmØ 30 mmØ 30 mmØ 30 mmØ 35 mmØ 30 mmØ 34 mmØ 34 mmØ 34 mmØ 34 mmØ 34 mm
Exhaust port sizeØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mmØ 37 mm
Model year1968196919691970197119711971, 19721971, 1972197219721973, 19741974, 1975
Model usageV7 700A-series AmbassadorV7 SpecialV7 SpecialV7 Special, V7 LAPDV7 Sport Telaio Rosso (Red Frame)V7 Sport Telaio Nero (Black Frame)V7 700V7 Sport Telaio Nero (Black Frame)V7 Special, V7 850GTV7 Sport Telaio Nero (Black Frame), 750 S, V7 Special, V7 850 GT750 S3, V7 850 GT, V7 850 California