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Honda CB750 CB650 CB550 CB400 CB350 tach drive plug block off w o-ring
5.0 ( 1 review)

Honda CB Tach Drive Plug Block Off w O-Ring

73-0884
$22.95 USD
In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,329 store reviews

1 product reviews

Honda CB Tach Drive Plug Block Off w O-Ring

$22.95 USD

Block off your tach drive cleanly with this Tach Drive Plug (Block Off) with O-ring. This plug is generally used when the tachometer cable drive is removed and still needs to be blocked off to prevent oil leakage. The plug has an O-ring groove machined in it for better sealing.

Several bike builders just cut the stock cable off and left the Honda cable drive end installed in the valve cover. This plug is a much cleaner option in both functionality and looks. These plugs are a real nice touch when you are not using the stock tachometer and need to eliminate the cable, or are using an electronic tach.

Installs in about a minute, no need to remove the valve cover to remove the tach drive gear assembly. Fits tachometer cables that are approximately 15mm in diameter with a 10.5mm groove and held in place with a screw.

Key Features
• Tach drive plug (block off) with O-ring
• Machined O-ring groove for better sealing
• Quick install, no valve cover removal
• Fits ~15mm-diameter cables with 10.5mm groove (screw-held)
• Cleaner look than cutting the stock cable

  • Fitment / Compatibility
  • CB750K (1969-78) Standard
  • CB750F (1975-78) Supersport
  • CB650 (1979-82)
  • CB650SC (1982) Nighthawk
  • CB650C (1981) Custom
  • CB550K (1974-78)
  • CB550F (1975-77)
  • CB400F (1975-77)
  • CB350F (1972-74)


• Honda CB550K (1974‑78)
• CB550F (1975‑77) Supersport

• Honda CB350F (1972‑74) Supersport
• CB400F (1975‑77) Supersport
Part Number: 73-0884

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Check the listed model and year, then read any fitment notes in the description.

Honda motorcycle models and years listed for this part
Make Model Year
Honda CB750K Standard 1969
Honda CB750K 1970
Honda CB750K 1971
Honda CB750K 1972
Honda CB750K 1973
Honda CB750K 1974
Honda CB750K 1975
Honda CB750F Supersport 1975
Honda CB750K 1976
Honda CB750F 1976
Honda CB750K 1977
Honda CB750F 1977
Honda CB750K 1978
Honda CB750F 1978
Honda CB650 1979
Honda CB650 1980
Honda CB650 1981
Honda CB650 1982
Honda CB650SC Nighthawk 1982
Honda CB650C Custom 1981
Honda CB550K0 1974
Honda CB550K1 1975
Honda CB550K2 1976
Honda CB550K3 1977
Honda CB550K4 1978
Honda CB550F1 1975
Honda CB550F2 1976
Honda CB550F3 1977
Honda CB400F 1975
Honda CB400F 1976
Honda CB400F 1977
Honda CB350F0 1972
Honda CB350F0 1973
Honda CB350F1 1974

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

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Other shipping options

Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.

Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.

Frequently Asked Questions

What is included with the Honda CB tach-drive block-off plug?

One block-off plug and one sealing O-ring are included. The plug closes the mechanical tachometer-drive opening when the cable is removed, including conversions to an electronic tachometer.

Does the tach-drive block-off plug require valve-cover removal?

No. It installs at the external tach-drive opening without removing the valve cover or tach-drive gear assembly.

What tach-drive opening fits this block-off plug?

It is made for a screw-retained opening approximately 15mm in diameter with a 10.5mm retaining groove. Measure the original drive before ordering if the cylinder head or tach-drive assembly has been changed.

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