CB900 Stats {
The CB900 Custom:
  • Manufactured from 1980 to 1982, it was a variant of the CB750 line, similar to the late CB750Fs. Dual Overhead cam, 16-valve, 5-speed with high/low drive.
  • Model Number: CB900C
  • Dry weight: 576 pounds
  • Horsepower: 82bhp at 9100 rpm
  • Fuel Capacity: 4.4 US gal, including 1.2gal reserve
  • Engine Oil: 4.7 US qt
  • Transfer Case Oil: 0.6 US qt
  • Final Drive Oil: 0.2 US qt
  • Final Drive: 3.08:1
  • Primary drive: 2.04:1
  • Secondary Drive: 0.72:1 low, 0.62:1 high
  • Quarter-mile: 12.72 @104mph
  • Seat Height: 30.8 in
  • Wheelbase: 62 in
  • Ground Clearance: 6.2 in
  • Rake: 28.5 degrees
  • Trail: 4.48 in
  • Compression Ratio: 8.8:1 (need to confirm this)
  • Carburetors: Four Keihin 32mm CV carbs
  • Octane recommendation: (r+m)/2 method, 86 octane or better
  • Spark Plug gap: .9mm (.035in)
  • Valve Clearance (cold):
    • Intake: .127mm (.005in)
    • Exhaust: .20mm (.008in)
Replacement Parts:
  • Spark Plugs: NGK DPR8EA9 works fine. There's a compatible Autolite plug if you're really in a bind.
  • Oil Filter: Fram #6009. Available at Wal-Mart and most Auto stores.
  • Tires:
    • Front: 110/90-19 62H
      Dunlop Qualifier F11
    • Rear: 130/90-16 67H
      Dunlop Qualifier 67H
Manuals:
  • Honda's original CB900C/F shop manual can be had at Helm Inc, Item #6146103. $32.00, in stock. Owner's manual is item #3146102 and costs $20.00.
}