2009 2mm Spears Racing Pistons and Tuning: Freshly built race engine by Mike@ Triple Strong Racing Parts as follows:Area P Pipe, KN filter pod, Dyno-jet kit, clip 3, 38 pilot, 112 mains, 3 out on mixture screw, MR12 fuel, Spears Racing 2mm over bore High Compression pistons, Degreed Camshafts, Spears Racing ceramic transmission bearings, Spears Racing 415 chain+sprocket set



2008-Current: Stock Kawasaki EX250 Compared to Spears Racing tuned All Stock with SP05-250 Jet kit,leo Vince Exhaust system,Stock air box with snorkel.All on Pump Gas 89 octane.


2008-Current: Stock Kawasaki EX250 with Leo Vince Exhaust Compared to Spears Racing Built Supersport/Production Race engine,Using all Stock OEM parts,Supersport Style valve job,Machined surfaces to tighten up the Squish,Degreed stock camshafts, Leo Vince Exhaust (No Baffle) Stock air box with snorkel, SP05-250 Jet Kit,All on Pump Gas 91 octane.

2008-Current: Stock Kawasaki EX250 with Leo Vince Exhaust Compared to Spears Racing Built Supersport/Production Race engine,Using all Stock OEM parts,Supersport Style valve job,Machined surfaces to tighten up the Squish,Degreed stock camshafts, Area "P" Race Exhaust Stock air box with snorkel, SP05-250 Jet Kit,All on Pump Gas 91 octane.



 EX250 Dyno Sheets