Donor bikes · Honda CB550

Honda CB550: Cafe Racer Donor Guide

Widely rated the best-balanced Honda SOHC4 for a cafe build — lighter and stiffer-framed than the CB750 with adequate power. Parts support is real but smaller than the 750's, and clean donors are getting pricier.

Engine: 544cc air-cooled SOHC inline-four, 50 bhp @ 8,500 rpm

Years: 1974–1978 (CB550K; CB550F 'Super Sport' 1975–1977)

Weight: ~437 lb / 198 kg dry

Final drive: Chain

Value: Aggregate sold data (classic.com) spans a $1,150 low to a $15,400 high, averaging around $5,100; a good running rider is roughly $3,500–$6,000. Directional only — not an appraisal.

Common problems

Cam chain tensioner/guide goes hard and brittle with age; a worn tensioner retards cam timing and can cause serious damage if ignored.
Points ignition is the first place to look for stuttering, misfires or hot-idle problems.
Budget aftermarket coils/stators are widely reported to fail after a few heat cycles — check ignition provenance.

What to check before you buy

Listen for a ticking/rattling top end at idle and cold start (tensioner).
Check points gap/condition, or whether a Dyna/Pamco electronic ignition has been fitted (desirable).
Confirm the exhaust is complete and matches K (4-into-4) or F (4-into-1) spec — replacements are dear.
Test charging output (the SOHC4 family is known for stator/rectifier weakness).
Verify K vs F designation and matching numbers — F models are cloned from K parts.

Thinking of buying one? Run the asking price through the value calculator before you commit — then see the Honda CB550 parts guide for the build itself.

Next: the build sequence, an honest cost breakdown, and gear worth buying.

Sources

Facts on this page are drawn from:

Values are directional guidance from classified and auction aggregates, not a verified appraisal — always check current sold comps for your market before buying or selling.