" 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



EO Ultimate 80 kit moves little bikes up big hills.
Big Bore kits    Installation
Carburetor and Intake kits
Headwork and Cams
  Exhaust Systems  Clutch parts
Goodies for 80's
Description SKU # Price


80120 S1K $500.00
  Stage 1
CRF80/120 kit, requires case machining (boring), includes resleeved cylinder (exchange) custom EO 120 piston/ rings/ wrist pin/ clips/head gasket/ base gasket.
  Stage 2
CRF80/120 kit, requires case machining (boring), includes resleeved cylinder (exchange) custom EO 120 piston/ rings/ wrist pin/ clips/head gasket/ base gasket/camshaft reground (exchange)/ 4 heavy duty head nuts/ heavy duty valve springs. Makes 12HP (yes 12 horsepower) when used with 22mm intake kit and EO outlaw series tuned exhaust.

80120 S2K


  Complete lower gasket and seal set. 80120 GSK




80120 INS $500.00
Installation of EO 80/120 Stage 1 or 2 kit 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
  Case machining (cases only) 80120 CMG $90.00

Carburetor and Intake

80120 SIK $250.00
  EO 22mm Carburetor and intake kit. 
This is a carb kit for modified 80/120cc motors. Provides great low to mid response for 120cc motors. This is the smallest carb for 120cc.
Kit includes, carburetor, airbox boot or K&N filter and throttle.
Yes it's to big for motors under 120cc.
  EO 24 Flat Slide Intake kit (Lineaweaver Design)
24mm for 120cc motors.
Kit includes, carburetor, custom intake manifold, air filter and throttle cable. Don't fight a losing battle with jetting, start with the right size carb.
12024 FSK $349.95
  EO HiFlow air box modification.
Great for stock motors to full race configurations.
80120 ABM $29.29

Head work and cam parts

  Cylinder head porting and intake matching.
We open your ports and match intake manifold size to work with your choice of intake kits
80120 CHP $249.95
  Slotted Cam Sprocket
Allows your cam to be degreed  professionally
80120 SCS $44.95
  Special Cam Sprocket Bolts
These bolts have a shoulder edge and washer face to correctly center your slotted cam.
80120 CSB $14.95

Clutch parts

  EO 4 disc heavy duty clutch
Includes basket, center, springs and plates to convert to 4 plate CRF/XR100 style clutch
80120 HDC $249.95
  Barnett heavy duty replacement clutch kit
Includes 4 plates, 4 springs and gasket.
80120 BCK $79.95

Exhaust Systems

OUTLAW  series High Pipe with 4" SuperTrap
 A real race proven pipe with SuperTrapp 4" tunable plates (CA and AMA 96 DB legal) disperses noise radially with no loss in power.
Aluminum heat guard for enhanced rider protection. Outlaw pipes not only look great they make better power across the whole RPM range, this true megaphone design creates more low end and more top end power. Why buy a LOUD BLING pipe when you get real performance in a quality pipe that includes a tuned headpipe and spark arrester. This pipe can take abuse and is ready to take on Hare Scrambles, TT, Motocross and Supermotard.  
Made in America    Now stainless steel construction.
80120 OHP $499.95
OUTLAW  series Low Pipe
Positively the best dirt track pipe you can buy for your mini. Shipped with open end and
stainless steel construction.
80120 OLP $499.95

Goodies for 80's

  Folding shift lever 80120 FSL $39.95
  Terminator front brake cable / It stops. 80120 TFC $44.95