" The Performance Specialists since 1990"
DYNO CHARTS for some of our motor kits.
CRF230L Pipes and motor parts instock Go big Go 250cc.
  ENGINES ONLY 1870 Stone Ave. San Jose CA 95125
If you may have a question please e-mail or phone us.      enginesonly@yahoo.com  (408)275-6300 phone //(408)342-6867 fax



Big Bore kits
Carburetor and Intake
Headwork and Camshafts 

Description SKU # Price

TTR 225 / 230   250 big bore kit  



 Our  249.44cc  bore kit is back.
Stage I kit Includes cylinder resleeved (exchange)  piston  11.5:1  compression ratio, rings, pin, clips, head and base gaskets. 
Cylinder core charge $250
  Stage II kit Includes cylinder resleeved (exchange) / piston  11.5:1  compression ratio , rings,  clips, pin, head and base gaskets / performance camshaft (exchange)/ performance valve springs.
With cylinder and camshaft exchange 
No Case Machining required, This is a bolt on kit.


80120 INS $250.00
Installation of above including valve job and case machining. Send us your complete assembled motor with no oil. We ship it back to you assembled and adjusted. YOU MUST ADD OIL


25032 FSK $599.95 
  32mm intake kit, includes 32mm Mikuni flatslide carburetor , cr throttle , throttle cable , modified intake boot , hi flow filter cage and air filter.
  EO HiFlow air box modification. 23025 ABM Included with above.

Head work and cam parts

  Cylinder head porting and intake matching. 23025 CHP $249.95


Light weight flywheel modification. 23025 LFM $125.00


  OUTLAW  series High pipe with 4" SUPERTRAP
 SuperTrapp 4" tunable plates (CA 96 DB legal)
disperses noise radially with no loss in power. Aluminum heat guard for enhanced rider protection. Available for Yamaha TTR125 TTR230, Honda XR / CRF 80,100,150,230,  Kawasaki / Suzuki KLX/DRZ125.   Forest Service saprk arrester legal.      

Now stainless steel construction.