" 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





Description SKU # Price

CRF150Fcc Ultimate Big Bore Kits

15025 BBK $1299.95
  CRF150F to 250cc Big Bore kit
Fits 03-05 motors
Oh Yea! The BIG kit. This is not a pick a piston and stroke your crank death wish motor kit. It is a well designed and reliable motor kit for use with our cams, intake kits and Outlaw exhaust. Increase your CRF150F to 247.54cc with an ENGINES ONLY Big bore kit. Runs on  pump gas, 91 octane / Big bore piston with 11.5:1 compression ratio / Kit includes New high compression piston with rings and clips, head and base gaskets, cam chain tensioners, Stroker crankshaft and all hardware. Not recomended for kick starting. RUNS ON PUMP GAS
CRF150F to 225cc Big Bore kit 
Fits 06 - 14 electric start motors ONLY

CRF150F to 225cc Big Bore kit

Increase your CRF150F to 225cc with an ENGINES ONLY 225cc Big bore kit. This proven safe, reliable and fun bolt on kit includes a new cylinder, forged piston, clips rings and top end gaskets. 11.5 : 1 compression ratio
No cylinder exchange required.  DYNO CHART
 Runs on pump gas 91 octane, We recommend our 28mm intake kit and Outlaw exhaust with this kit.
15022 BBK $599.95
CRF150F Hi Compression 06/15
13.0:1 150CC Class legal CRF150F piston kit.
Fits 06-15 electric start motors ONLY. 
57.48mm, 149.98cc, requires cylinder boring.
Complete kit with 13.0:1 piston and gaskets.

Above kit with new cylinder bored. Includes rings sized and ready for installation. Bolt on kit.

15013 BBK

15013 BBC





2006-12 225 kit installation
Send us your complete engine only (no oil) and we will do a top end teardown, 3 angle valve job and reassemble your engine, valves adjusted and timing set. No
case machining required.
(you add oil, motors shipped dry)
15022 INS $250.00
2003-05 250cc Kit Installation
Send us your complete engine only (no oil) and we will do a complete top and bottom end teardown, bore your cases, 3 angle valve job and reassemble your engine, valves adjusted and timing set.
Includes case machining.
(you add oil, motors shipped dry)
15025 INS $600.00
  Case machining (cases only) 250cc kits 15025 CMG $90.00


OUTLAW  series High pipe with 4" SUPERTRAP
 This is simply the best pipe for your CRF150 or 230 in MX or Enduro setup. SUPERTRAP tunable to meet performance and noise requirements.
Meets all AMA sound check standards. Forest Service approved spark arrester. Now stainless steel construction.
15005 OHP
15006 OHP
OUTLAW series Low pipe for flat track, supermoto and road racing applications (Lineaweaver Design).  Now stainless steel construction.
2005 and earlier 15005 OLP
2006 and later 15006 OLP
15005 OLP
15006 OLP


15028 FSK  $349.95
CRF 150 28mm Flat Slide Intake Kit (Lineawaever Design) Includes Carb. /cable /intake manifold and K&N filter or stock type air box boot. Works great with our 2006-2011 225 big bore kit.
CRF 150 32mm Flat Slide Intake Kit 
For CRF 230 and our 250cc motor kits. Includes Carb. fully jetted, intake manifold, airbox boot or K&N air filter, plus CR throttle and cable.
15032 FSK $499.95
  EO HiFlow air box modification. 23030 ABM $90.00


  Hi-Flow Cylinder head porting includes intake manifold matching for increased airflow. 23030 CHP $250.00
  Camshafts 03-05 Kickstart motors
Stage #1 Torque Cam.
Stage #2 All Around Cam increases mid range.
Works well with stock rockers, requires springs only, no additional work. Bolt in.
Stage #3 Dirt Track / TT / Supermoto Type. *
Stage #4 Full Race / Roadracing Type.*
*Requires EO spring kit and EO head modification.
Core charge if you do not send us your Stock cam $120.00

Camshaft 06-12 electric start motors
Core charge if you do not send us your Stock cam $120

15001 CAM
15002 CAM
15003 CAM
15004 CAM

15006 CAM



Valve springs
Required for our all EO performance camshafts.
Includes high RPM spec intake and exhaust springs.
15034 VSK $99.95
  Stage #3 & #4 Head modification
Required for our stage #3 & #4 camshafts.
Includes seat modification and valve job. 
15034 HDM $250.00
  Slotted Cam Sprocket. Sprocket ONLY
Allows your cam to be degreed  perfectly.
15023 SCS $44.95


Picture Coming Soon FOX PODIUM X with remote reservior.
Does not fit CRF230"L"
15000 WRK $599.95

Goodies & Graphics

  Shift Lever
1" longer folding shift lever for crf 150 03~06
15023 FSL $39.95
Graphics kits now available.
bulletEO Shrouds left and right side. fender arches left and right.
15023 GRA $79.95