Gregory Bender

Quick maintenance data

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

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Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Spark plug type & gap

Moto Guzzi:
NGK BP6ES; 0.6 mm (0.023 inch)

From NGK website:
BP7ES; 0.028 inch

Bosch
Platinum WR7DP (4216 or 4016)

Moto Guzzi:
NGK BP6ES; 0.6 mm (0.023 inch)

From NGK website:
B7HS; 0.028 inch
B7ES; 0.028 inch

Bosch
Platinum WR7DP (4216 or 4016)

Moto Guzzi:
NGK BP6ES; 0.6 mm (0.023 inch)

From NGK website:
BP6ES; 0.025 inch

Bosch
Platinum WR7DP (4216 or 4016)

Note: Recommendations from the NGK website are listed here as a convenience only. I strongly prefer the NGK BP6ES listed by Moto Guzzi over any other listed by NGK.

Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Engine oil

3 liters (3.17 quarts) of 20W-50 motor oil

Note: Many people in countries that sell oil in quart containers simply use 3 quarts of oil. The lack of 0.17 quarts of oil makes no appreciable difference in performance or longevity.

I've never been one to concern myself with one particular brand vs. another. To the contrary, I've purchased and used Walmart's inexpensive Super-Tech brand oil for years. However, recent federal regulations have dramatically decreased the ZDDP content in most oil. ZDDP content of at least 1200 PPM is necessary for our flat tappets and camshafts to last. Therefore, I've now become quite picky as to which oil I purchase. Here are several that still have sufficient ZDDP levels (for now, anyway):

  • Mobil 1 15W-50
  • Mobil 1 Extended Performance 15W-50
  • Mobil 1 V-Twin 20W-50
  • Shell Rotella T 15W-40
  • Valvoline Racing VR-1 20W-50

Due to cost and availability concerns, I am currently using Shell Rotella T 15W-40.

Some of these oils are highly detergent. When switching oils, it is best to perform a couple of very quick oil changes to remove all of the deposits the detergents removed.

Here are some articles on the subject:

Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Transmission oil

750 cc (1.585 pints) of 80W-90 gear oil

GL-4 gear oil is preferred.

I extracted this information from Charlie Mullendore of Antietam Classic Cycle off of the Yahoo! Loopframe_Guzzi news group.

Like engine oil, I've never been one to concern myself with one particular brand vs. another. To the contrary, I've purchased and used Walmart's inexpensive Super-Tech brand gear oil for years. However, I've learned that the GL-5 rating for gears oils contains sulphur compounds that attack brass and bronze. Since the 4 speed transmission use bronze bushings, the GL-4 rated gear oils should be used. Here are some brands that are still available in GL-4:

750 cc (1.585 pints) of 80W-90 gear oil

GL-5 gear oil is fine.

Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Rear drive box oil

The same rear drive housing with the same capacity was used. However, official documentation varies widely as to what quanity of oil should be used (variations sometimes occur within the same document).

GL-5 gear oil is fine.

360 cc (12.7 oz) total capacity; of which:

  • 340 cc (11.4 oz) should be 80W-90 gear oil
  • 20 cc (0.67 oz) should be a molybdenum additive

GL-5 gear oil is fine.

Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Fork oil

160 cc (5.4 oz) of 30 weight fork oil (per tube)

Some people report improved damping using 8 oz of 30 weight fork oil (per tube)

Drum brake forks

160 cc (5.4 oz) of 30 weight fork oil (per tube)

Some people report improved damping using 8 oz of 30 weight fork oil (per tube)



Disc brake forks

50 cc (1.8 oz) of ATF (per tube)

Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Intake valve clearance 0.1 mm (0.00393 inch) 0.15 mm (0.0059 inch)
Exhaust valve clearance 0.2 mm (0.00787 inch) 0.25 mm (0.0098 inch)
Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Contact breaker points gap

0.42 mm - 0.48 mm (0.016 inch - 0.018 inch)

When static timing the number 2 cylinder (left side), the narrow lobe on the distributor shaft should be opening the contact breaker points. Correspondingly, the number 1 cylinder (right side) is opened by the wide lobe.

Number 1 cylinder location right side
Number 2 cylinder location left side
Maintenance item V700 V7 Special / Ambassador 850 GT / 850 GT California / Eldorado / 850 California Police
Maintenance intervals Everyone has their own opinion based on their personal experience and riding characteristics. I follow the Moto Guzzi guidelines and change the engine oil every 1,800 miles. I also change the transmission and drive box oil at the same time (although Moto Guzzi recommends changing the gear oils every 6,000 miles). I also check and set the valves every 1,800 miles. I change the fork oil yearly.