Derbi RD-50 With 12V Electric Start

By Robert Smiley · Derbi RD-50 · 1987

Added · Updated

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I completely grafted a DS-50 into my wife's bike. Update!!! A 52.5 mm Namura Kawasaki XK-100 piston in a sleeved 47 mm Metrakit cylinder was used with a Derbi TOP flat reed crankshaft - competition crank re-balanced by Crank Works in Arizona. I must say they did a super job. 6 holes on the inside surfaces slugged with tungsten and ground flat. No "stuffing" necessary! Still has a bit of vibration at the 3 and 9 o'clock position which is unavoidable. Hauls A**? 2.3 Gallon modified gas tank also.

Parts

engine

  • Derbi Flat Reed
  • Derbi 70cc Metrakit 84.9cc's

carburetion

  • Dellorto 19mm PHBG

exhaust

  • Custom

electrical

  • Derbi electronic

Tuning

Main 102 · Idle 45

Comments (2)

Peter Notarangelo — 12 years, 3 months ago

i love over-engineering

Tyler Brekke — 12 years, 6 months ago

So crazy, nice job Smiley