Rear Drum Brake Shoes | Honda CB350 / CL350 / SL350 K0
Forty-plus years on the bike, the original friction lining starts cracking loose from the shoe body — and you lose stopping power before the wear indicator ever triggers. These OEM-style replacement shoes restore stopping power on the smaller-diameter rear drum used across the CB350, CL350 Scrambler, and early SL350 family. Both grades ship with new springs.
Why You Need This
If your bike still has its factory shoes, the friction lining is probably starting to come loose from the shoe core after four-plus decades. You'll feel it as weak braking, glazed friction surfaces, and a rear pedal that needs more and more travel to do its job. Per the CB350 factory service manual (p.104), the lining is at end-of-life when it drops below 5.5 mm thickness — but in practice, the original friction material almost always delaminates first.
Look for the OEM Honda Motors "HM" stamp cast into the aluminum body of your existing shoes — if you see it, you're running 40+ year old original parts. Brake shoes make our short list of top 5 items to change on a vintage Honda.
We stock these in two grades: Premium (organic friction material) and Service (semi-metallic for stronger stopping power). Both grades include new springs.
Specifications
| Spec | Detail |
|---|
| Replaces OEM Part | 45133-240-000, 43120-KG4-006, 43120-KG4-000, 43120-KG4-003, 43120-286-000, 43120-943-680 |
| Fits Models | CB350 K0-K5 (1968-1973), CB350G (1973), CL350 Scrambler K0-K5 (1968-1973), SL350 K0 (1969-1970) |
| Sold As | Set (pair) with springs — select Premium Grade or Service Grade at checkout |
| Drum Diameter | 161.10–161.4 mm (6.339–6.364 in) standard — the smaller-diameter rear drum family |
| Lining Service Limit | Replace when below 5.5 mm (0.217 in) per CB350 factory service manual |
| Brake Style | Single-cam leading-trailing drum, single-cam rear panel |
Note: Both Premium and Service grades ship with new replacement springs already attached. We recommend keeping your old OEM springs as backup, but you don't need to reuse them on this kit.
Model-Specific Notes
- SL350 K0 only (1969-1970): SL350 K1 and K2 (1971-1973) have a different, smaller rear drum that uses a different shoe set — order our CB175 / CB200 / SL350 K1-K2 Rear Brake Shoes instead.
- CB350G (1973 disc-front variant): Same rear drum as CB350K-series — these fit. CB350G uses different pads up front (disc instead of drum).
- CB360 family: The CB360G/T, CL360 K0/K1, and CJ360T share the same 161 mm rear drum and these shoes physically fit. We stock a CB360-titled SKU for clearer fitment routing if you have a CB360 family bike.
- Does NOT fit: CB450, CL450, CB500T, CB500K, CB550 — those use a larger ~200 mm rear drum with a different shoe set (see our CB450 / CL450 / CB500T or CB500K / CB550K / CB550F rear shoes). CB350F and CB400F (inline-four-cylinder bikes) — different chassis, not in our confirmed fitment for this product.
Installation
Difficulty: Intermediate
Tools needed: Brake cleaner, brake caliper grease, 80-grit sandpaper or wire brush, new cotter pins, gloves, eye protection.
- Pull the rear wheel and separate the brake panel from the hub. Inspect the OEM "HM" stamp on the shoes — confirms factory original.
- Remove the 2 × 15 mm cotter pin and anchor pin washer per the factory service manual (p.103).
- Separate the brake arm from the panel and extract the old shoes.
- Toss the old shoes (recyclable as scrap). Discard the old cotter pins — never reuse them.
- Sand the inside of the drum with 80-grit sandpaper or a wire brush to break the surface glaze. Wipe down with brake cleaner.
- Apply a light coat of brake caliper grease to the cam and shoe pivot points. Wipe excess immediately — grease on the friction surface ruins braking.
- Install the new shoes (springs already attached).
- Install new cotter pins. Spread the legs.
- Reassemble the wheel.
- Adjust rear pedal free play to 20-30 mm (0.8-1.2 in) per the factory service manual (p.171).
If grease contacts the friction surface: Spray with brake cleaner and wipe thoroughly. Any contamination kills braking.
Brake dust safety: Wear gloves and eye protection. Don't inhale the dust from old shoes.
Frequently Asked Questions
Will these fit my SL350 K1 or K2?
No. SL350 K0 (1969-1970) uses the same rear hub as the CB350 — these shoes fit. SL350 K1 and K2 (1971-1973) have a different, smaller rear drum that takes a different shoe set. Order our CB175 / CB200 / SL350 K1-K2 Rear Brake Shoes instead.
Should I get Premium Grade or Service Grade?
Premium Grade is organic friction material — what most riders want for a stock-feeling rebuild. Service Grade is a semi-metallic compound for stronger stopping power if you ride harder or want shorter rear stops. Both grades include new springs, so spring availability isn't a decision factor here.
Do these include the springs?
Yes. Both Premium and Service grades ship with new springs already attached to the shoes. We recommend saving your old OEM springs as backup, but you don't have to reuse them on this kit.
How do I know my brake shoes are actually worn?
Per the CB350 factory service manual (p.104), the lining is at end-of-life when it drops below 5.5 mm (0.217 in) thickness. In practice, the original friction material almost always delaminates from the shoe body before that threshold — you'll see cracking, separation, or chunks missing when the wheel is off. Replace immediately if you spot any of those.
Will these work on a CB360 or CL360?
Yes. The CB350 and CB360 families share the same 161 mm rear drum, and these shoes physically fit either bike. We stock a separately-titled CB360 / CL360 / CJ360 Rear Brake Shoes SKU for clearer fitment routing if you have a CB360 family bike.
Will these work on my CB350F or CB400F?
No. The CB350F and CB400F are inline-four-cylinder bikes with a different rear brake architecture. These shoes are for the CB350 / CL350 / SL350 K0 twin family only.
Do I need new cotter pins?
Yes — always replace cotter pins on every install. They're cheap and a brake-shoe pivot pin walking out under load is exactly the kind of failure you don't want.
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Last updated: May 2026
