Sun Coast Cycle Sports carries used parts for the Honda Rebel 450 (CMX450C), a short-production cruiser manufactured only in 1986 and 1987. Powered by a 447cc air-cooled parallel-twin with SOHC and three valves per cylinder, the CMX450 was the larger sibling of the Rebel 250 and offered meaningfully more power at 38hp. Despite its brief two-year run, the Rebel 450 developed a dedicated following among riders who wanted more than the 250 could offer while keeping the same low, beginner-friendly ergonomics. Parts from these bikes are individually inspected, photographed, and tracked with unique SKUs at our Odessa, Florida warehouse.
Rebel CMX 450 generation and parts compatibility
The CMX450C was produced only for 1986 and 1987, with no significant changes between model years. It uses a 447cc air-cooled SOHC parallel twin fed by two Keihin carburetors, mated to a six-speed transmission. The frame is a double-cradle steel design with 38mm telescopic forks, dual rear shocks, a 240mm front disc brake, and a 230mm rear drum brake.
The Rebel 450 shares essentially no parts with the Rebel 250 (CMX250C) despite the visual similarity. The frame dimensions, engine, transmission, and all mechanical components are different between the two. The only confirmed interchange between the 250 and 450 is the rear turn signal assemblies and stems. Buyers should not assume any cross-compatibility based on the shared Rebel name.
Because of its short production run and relatively low sales volume, OEM parts for the CMX450 can be difficult to source. The engine is unique to this model and does not appear in any other Honda. Aftermarket support is limited compared to the Rebel 250, making used OEM parts from donor bikes the primary sourcing option for many components.
Common Rebel CMX 450 failure points and replacement parts
Carburetor fouling (both years): Like the Rebel 250, the 450's Keihin carburetors are prone to gumming and jet clogging from stale fuel. Given that most surviving CMX450s are nearly 40 years old, carburetor rebuilds are almost universal. Finding correct rebuild kits can be challenging due to the limited aftermarket support for this model.
Electrical system aging: At nearly four decades old, most Rebel 450s have degraded wiring insulation, corroded connectors, and weakened stator output. Complete wiring harnesses in good condition are among the most sought-after used parts for this model.
Exhaust stud corrosion: Similar to the Rebel 250, the exhaust studs on the 450 are prone to corrosion and breakage, especially on bikes that have been stored outdoors.
The Rebel 450 has no NHTSA recalls and no widely documented systemic mechanical defects beyond normal aging. Most parts needs on these bikes are driven by age-related deterioration rather than design flaws.
Commonly replaced Rebel CMX 450 parts
- Carburetor assemblies and rebuild kits
- Wiring harness and electrical connectors
- Stator and rectifier/regulator
- Exhaust studs and headers
- Brake pads and rear drum shoes
- Chain, sprockets, and final drive components
- Fuel tank (rust-free examples)
- Seat and side covers
Frequently asked questions
Q: Do Rebel 250 parts fit a Rebel 450?
No. The CMX250 and CMX450 are mechanically unrelated despite the shared Rebel branding and similar appearance. The frames are different dimensions, the engines are entirely different (234cc twin vs. 447cc twin with different architecture), and the suspension and braking components do not interchange. The only known crossover is the rear turn signal assemblies.
Q: Why are Rebel 450 parts harder to find than Rebel 250 parts?
The CMX450 was produced only in 1986 and 1987, while the Rebel 250 was made from 1985 to 2016. The 250 sold in vastly larger numbers over a 30-year span, creating a large parts ecosystem. The 450's engine is unique to this model, and the small production volume means fewer donor bikes exist in salvage.
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