Oil Change Gasket Kit | Honda CL360 / CJ360 / CB360
The CB360 has the same centrifugal oil filter as its CB350 and CB450 cousins — but unlike those bikes, there is no separate filter access cover on the right side. To clean the rotor on a CB360 you have to remove the entire right crankcase cover, which means a fresh gasket and bolt O-rings every time. This kit is exactly that: the five gasket types you disturb every time you do a proper oil-and-filter service.
Why You Need This
Honda paper gaskets and O-rings compress against the mating surface during the first install. Pulling them off and refitting them produces a poor seal even if they look intact. O-rings take a set and won't return to their original shape. Replace every piece you disturb — it's a few dollars in gaskets versus chasing a slow leak later.
The Oil Change Kit (#4017) covers the gaskets and O-rings disturbed during a routine CB360 oil service: the three rotor cover bolt O-rings (Letter A), the oil pick-up tube O-ring (B), the oil filter rotor O-ring (C), the stator rotor cover gasket (D), and the right crankcase cover gasket (E). If you are going deeper — carbs off for an intake reseal, points cover off for ignition timing, or a full top-end inspection — step up to the Service Kit (#4014) or Overhaul Kit (#4003) instead.
Specifications
| Spec | Detail |
|---|
| Replaces OEM Part | 91301-426-010, 91301-393-000, 91307-369-000, 91309-286-000, 11691-286-306, 11691-286-000, 11394-369-306, 11394-369-000 |
| Fits Models | CB360G (1974), CB360T (1975–1976), CL360K0 (1974), CL360K1 (1975), CJ360T (1976–1977) |
| Sold As | Sold Individually (5 gasket types, 7 pieces) |
Note — Oil Choice: Use SAE 10W-40 or 15W-40 100% mineral only. The CB360 has a wet clutch that shares oil with the engine. Modern semi-synthetic and full-synthetic oils contain friction modifiers that cause clutch slip and hard shifting. As of late 2023, Shell Rotella T4, Chevron Delo 400, and Mobil Delvac 1300 reformulated to semi-synthetic and now cause clutch slippage in these engines. Add 2 oz of zinc (ZDDP) additive per US quart with every oil change — roughly 3 oz per change at the 1.6 qt capacity.
Note — The CB360's Filter-Clean Pain Point: On a CB350 or CB450 you can clean the centrifugal filter rotor through a small access cover on the right side. On a CB360 there is no access cover — the entire right crankcase cover has to come off. That means the kit's Letter E (Right Crankcase Cover Gasket) and Letter A (Stator Rotor Cover Bolt O-Rings) get disturbed every single time you clean the filter, which is why they are in the routine kit instead of the bigger Overhaul Kit.
What's in the Kit
Five gasket types, 7 pieces total. The kit covers everything you disturb on a routine oil-and-filter service. Letters F–I are added in the Service Kit (#4014) and Letters J–T in the Overhaul Kit (#4003):
- A — Stator Rotor Cover Bolt O-Rings (qty 3)
- B — Oil Pick Up Tube O-Ring (qty 1)
- C — Oil Rotor O-Ring (qty 1)
- D — Stator Rotor Cover Gasket (qty 1)
- E — Right Crankcase Cover Gasket (qty 1)
Full CL360 / CJ360 / CB360 kit-comparison chart:
Installation
Difficulty: Intermediate — the oil drain itself is easy, but cleaning the centrifugal filter requires removing the right crankcase cover.
Service intervals (per CMC):
- Engine oil: every 1,500 miles / 2,400 km
- Centrifugal oil filter rotor: every other oil change (≈ 3,000 miles / 5,000 km)
Procedure:
- Drain the oil warm: Run the engine to operating temperature, kill it, place the drain pan under the engine. Use a 17 mm wrench to remove the drain plug. Inspect the drain plug O-ring — replace if pinched or hardened (drain plug is sold separately).
- Remove the right crankcase cover: Drain residual oil, remove the foot peg if needed for access, remove the kick-start lever, and remove the cover bolts. The Phillips screws on stock CB360s are notorious for stripping — we strongly recommend swapping them for the Lower Allen Bolt Kit on this service. The Right Crankcase Cover Gasket (Letter E) and the three Stator Rotor Cover Bolt O-Rings (Letter A) come off with the cover.
- Clean the centrifugal filter rotor: Pull the snap ring, remove the filter cap (O-ring is Letter C), and clean built-up sludge from the rotor cavity with a screwdriver or scraper and brake cleaner. Inspect the oil pick-up tube and clean its mesh screen as well.
- Replace gaskets and O-rings dry or with a thin film of light sealer like Gaskacinch. Do NOT use RTV silicone — excess silicone breaks loose and can block oil passages downstream.
- Reinstall the right crankcase cover with the new gasket (Letter E). Apply anti-seize to the cover bolts on reinstall so they come out cleanly next time. Tighten in a cross pattern, snug but not crushed.
- Refill with 1.5 L / 1.6 US qt of SAE 10W-40 or 15W-40 100% mineral oil. Add 2 oz of zinc additive per US quart (about 3 oz total). Run the engine, let it settle, and recheck the dipstick.
Installation Tip: Clean the surfaces well and remove all traces of old gaskets along with any silicone that has been used along the way. Install gaskets dry or with a light sealer like Gaskacinch.
Our CB360 oil change walkthrough covers drain plug, refill quantity, oil grade, and zinc additive dose. The deeper filter-clean procedure (the part that uses gaskets A, D, and E) is in our CB350/CB360/CB450 oil filter clean video.
Frequently Asked Questions
Will this kit fit a 1973 CB360?
Honda did not make a CB360 in 1973. CB360 production for the U.S. market began in 1974 with the CB360G. If you have a 1973 Honda twin labeled "360," it is almost certainly a late CB350K5 (the final CB350 model year was 1973). Order the CB350 Oil Change Gasket Kit for that bike — the kits are NOT interchangeable.
Does this kit include the oil filter rotor snap ring?
No. The 45 mm internal snap ring that holds the filter cap is reused unless damaged. If it is bent or rusty, contact us — OEM #90604-292-000.
Does this kit include the three small O-rings for the stator/flywheel cover bolts?
Yes — that is Letter A, qty 3, sealed under the heads of the three stator rotor cover bolts. This is one of the most-asked-for items in the kit.
What's the difference between the Oil Change Kit (#4017), Service Kit (#4014), and Overhaul Kit (#4003)?
The Oil Change Kit (this one, Gaskets A–E) covers a routine oil-and-filter service: the right crankcase cover, the filter rotor, and the pickup tube. The Service Kit (#4014) adds Letters F–I — intake manifold gaskets (2), breather cover, points cover, and left crankcase cover — for the standard mid-mileage service (carbs off, points service, left-side stator/shifter work). The Overhaul Kit (#4003) adds Letters J–T — head, cylinder base, exhaust, valve seals, dipstick, and the rest — for a full engine teardown.
Can I use this kit on my CB350?
No. The CB350 is a different engine with different gasket sizes. The CB350 Oil Change Kit (#4018) has 6 pieces (Letters A–F); the CB360 kit has 7 pieces (Letters A–E with A qty 3). Look up the kit specific to your bike at our CB350 Oil Change Gasket Kit page.
My CB360 starts hard-shifting after the engine warms up — is it my oil?
Likely yes. The CB360 has a wet clutch sharing the engine oil. Modern semi-synthetic and full-synthetic motor oils contain friction modifiers that cause the clutch plates to slip. Drain whatever is in there, refill with 100% mineral SAE 10W-40 (or 15W-40 diesel-truck mineral), add 2 oz of zinc additive per quart, and the shifting feel usually returns within a tank or two. Note that as of late 2023, Shell Rotella T4, Chevron Delo 400, and Mobil Delvac 1300 reformulated to semi-synthetic and now cause this issue.
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Last updated: May 2026
