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Yamaha RD250LC (2000)
Engine 
Head skimmed 0.4mm.
RamAir foam filters, air corrector kit, #250 main jets.
Squish = 0.9mm
Ignition timing = 1.6mm BTDC.
Exhaust port height = 27.5mm from top of barrel.
Head torque setting = 30lb/feet.
Spark plugs = B10EV.
RamAir foam filters, air corrector kit, #250 main jets.
Crank and gearbox rebuilt by Taymar Racing.
This tune gives good power and it has also proved to be reliable.
Chassis
Removal of all unnecessary road gubbings.
Spax shock.
Avon AM22 and AM23 race compound tyres.
Braided steel brake lines.
Forks dropped 13mm through yokes, running 15mm spacer and 20w oil.
Tubular fork brace.
Digital temperature gauge.
TAGG Racing rearsets.
Yamaha TZR250 V-Twin (3XV) …….back to the road..
Michelin Pilot Race tyres.
Barrels, head, PV to Stan Stephens stage 3 tune.
3XV-70 'RC-SUGO' CDI
290 / 270 main jets.
NGK BR9EIX Iridium plugs
Hydro-formed pipes with Tyga end cans
Dyno chart showing 49.3bhp at the rear wheel with standard pipes and CDI.
Before I took it to bits:....
and after:....
One day they'll be a picture with a fairing on. One day.
Voila.
Finished!
