How many grease zerks are on a 2007 GSX 550 fan snowmobile? I found one near the secondary, two under the hood (steering) and four in the rear suspension for a total of 7. Are there any more? What about the area around the center shock? I could not find any other than the 7 mentioned above.

You have found all that I am aware of.

Ride Safe.

Doo they not list them in the owners manual?

No grease zerk location info in the owner's manual. The SC suspension on the fan have 6 fittings;

2 on the front arm; one on the front arm lower pivot, one on the upper pivot near the front shock mount.
2 on the lower rear arm (2 on the lower knee pivot points).
1 on the upper tunnel pivot near the rear shock rear mount.
1 near the rear shock front mount.

The steering has 3 fittings;
1 on the lower steering shaft.
2 on the lower steering swivel arms (where the inner tie rods connect)

The speedo side bearing under the secondary clutch should have lithium grease not suspension grease.

I cannot find the the two on the front arm. My sled does not have the adjustable center shock. Is it possible that the SC4 suspension on the 550 fan machines only have 4 grease zerks (all in the rear)?

No grease zerk location info in the owner's manual. The SC suspension on the fan have 6 fittings;

2 on the front arm; one on the front arm lower pivot, one on the upper pivot near the front shock mount.
2 on the lower rear arm (2 on the lower knee pivot points).
1 on the upper tunnel pivot near the rear shock rear mount.
1 near the rear shock front mount.

The steering has 3 fittings;
1 on the lower steering shaft.
2 on the lower steering swivel arms (where the inner tie rods connect)

The speedo side bearing under the secondary clutch should have lithium grease not suspension grease.[/b]