Rex CDI Unit for '79-'81 Yamaha SR500

The Rex CDI Unit is tuned to optimize the SR's engine over the factory unit, it allows
for a corrected timing curve, easy starting and certainly improved throttle response.

Ref. OBSOLETE Part Number: 3H1-85540-51-00

Fitment: 79-'81 Yamaha SR500 (suitable for Rotor marked 032000-077)