MADE IN THE UNITED STATES OF AMERICA

Motocross Engine Performance Packages

Engine tuning has been the passion of Yoshimura since the very beginning. Pops Yoshimura started 4 stroke engine performance over five decades ago.  At Yoshimura, building engines with experience and precision is what this brand is about, and today is no different.

We offer complete top end packages for all four Japanese brands: Suzuki, Honda, Yamaha, and Kawasaki Motocross vehicles. Prices starting at $575.00!

For more information contact:

Dave Sanders
Engine Building Services

(909) 628-4722 Ext: 430
dsanders@yoshimura-rd.com

HEADWORK / TOP END PACKAGES:

Headwork / Top End Packages are available for:

  • Suzuki RM-Z450
  • Suzuki RM-Z250
  • Honda CRF450R
  • Honda CRF250R
  • Kawasaki KX450F
  • Kawasaki KX250F
  • Yamaha YZ450F
  • Yamaha YZ250F

STAGE 1 Package from $575.00

Stage 1 port and polish includes:

  • Optimize port profile for Stage 1 specification
  • Inspect valves
  • Inspect valve train components
  • Reface valve seats
  • Assembly

STAGE 2 Package Call For Pricing

Stage 2 port and polish includes:

  • Optimize port profile for Stage 2 specification.
  • Machine head surface for compression increase
  • Inspect valves
  • Inspect valve train components
  • Reface valve seats
  • Assembly

STAGE 3 Package Call For Pricing

*ALL MODELS VARY IN MODIFICATIONS

Stage 3 port and polish includes:

  • Optimize port profile for Stage 3 specification
  • Machine head surface for compression increase
  • Install oversize valve seats
  • Install high performance oversized valves
  • Install high performance valve springs, top retainers, and valve cotters.
  • Assembly

COMPLETE ENGINE PACKAGES:

Yoshimura Complete Engine Packages are available for:

  • Suzuki RM-Z 450 2013-2015
  • Suzuki RM-Z 250 coming soon!
  • Honda CRF 450 2013-2015
  • Honda CRF 250 2013-2015
  • Yamaha YZ 450F 2015-16
  • Yamaha YZ 250F 2015-16

STAGE 1 Engine Package from $2499.00

Stage 1 includes:

  • Optimize port profile for Stage 1 specification
  • Inspect valves
  • Inspect valve train
  • Re-surface valve seats
  • Piston, rings, and pin replacement
  • Inspect crankshaft, transmission assembly, complete clutch re-conditioning
  • Blue print complete bottom end and assemble

STAGE 2 Engine Package Call For Pricing

Stage 2 includes:

  • Optimize port profile to Stage 2 specification
  • Machine cylinder head surface for compression increase
  • Inspect valves
  • Inspect valve train
  • Re-surface valve seats
  • Install Yoshimura camshaft, degree to specification
  • Piston, ring and pin replacement
  • Inspect crankshaft, transmission assembly, complete clutch re-conditioning
  • Blue print complete bottom end and assemble
  • Pro Taper wireless hour meter 

STAGE 3 Engine Package Call For Pricing

*ALL MODELS VARY IN MODIFICATIONS

Stage 3 includes:

  • Optimize port profile for Stage 3 specification
  • Machine cylinder head surface for compression increase
  • Install oversize valve seats
  • Install high performance oversized valves
  •  Install high performance valve springs, top retainers, and valve cotters
  • Install Yoshimura camshaft, degree to specification
  • Piston, ring set and pin replacement
  • Inspect crankshaft, transmission assembly
  • REM/ISF transmission treatment
  • Install complete Hinson clutch assembly
  • Blue print complete bottom end and assemble
  • Vortex ignition (with Yoshimura spec maps)
  • Pro Taper wireless hour meter 
YOSHIMURA ENGINE PERFORMANCE GRAPHS:
Suzuki RM-Z250 Yoshimura Stage-2 Engine Package
Suzuki RM-Z450 Yoshimura Stage-2 Engine Package
Honda CRF450R Yoshimura Stage-2 Engine Package
Honda CRF250R Yoshimura Stage-3 Engine Package
Yamaha YZ250F-Motocross Stage 3 Engine Package
IN THE NEWS  

Check out what VitalMX.com had to say about the 2015 CRF 450 project bike with stage 2 Engine performance.
[READ ARTICLE]

Testing a 2015 Honda CRF250R with a Yoshimura Stage two engine mod and Factory Connection suspension.
[WATCH NOW]

 



For more information contact:

Dave Sanders
Engine Building Services

(909) 628-4722 Ext: 430
dsanders@yoshimura-rd.com