Porting

Engine performance can be altered drastically by porting your cylinder (2-cycle) or head (4-cycle). The skilled engine builders at LaBaron's Power Sports have years of experience modifying cylinders and heads to squeeze every drop of horsepower out of them. Whether you desire to build a fire-breathing race engine, or want to modify the power delivery of your weekend trail machine, we can develop a porting package, along with other engine modifications, that fit the needs of your specific application.


Cylinder and head porting can become a very cost-effective way to increase your 2-stroke or 4-stroke engines horsepower when simple bolt-on modifications wont satisfy your power output needs. Based on current modifications, horsepower goals, and powerband characteristics, Labaron's Powersports experienced technicians can design a Porting package that will meet and exceed your needs. From Basic Hand Trail Porting, 3 angle valve jobs and full out CNC Race Porting; Labaron's expert technicians have you covered!

This dyno chart shows horsepower and torque curves for a 2007 KX250F. This particular machine has a 14:1 compression Wiseco piston and FMF powerbomb header. The blue line shows the horsepower and torque utilizing a stock cylinder head. The red line shows horsepower and torque achieved after we performed moderate porting, texturing, and a performance valve job.

The Honda TRX450R in this dyno chart made 41.33rwhp and 28.21rwtq utilizing a 13.5:1 wiseco piston, hotcams stage 2 cam, and Motoworks SR4 full system. After we performed a performance valve job and some minor cylinder port and combustion chamber modifications, the customer picked up nearly 2.5 r.w.h.p. and 2 ft/lbs of torque across the board, with an increase of nearly 4 r.w.h.p. at 10,000 RPM

Q: How effective is porting on its own?

A: There are more horsepower benefits for 2-strokes. 4-Strokes require other modifications to maximize the porting work (exhaust, camshafts, high compression pistons, etc.)

Q:  What kind of horsepower gains can I expect?

A: Typical results are 2-4 horsepower.

Q: Is it possible to lose horsepower porting?

A: We have seen several amateur porting jobs that were ported incorrectly. Substandard porting usually can not be reversed. A new cylinder or cylinder head must be purchased.

Porting Pricing

  • 2-Stroke Starting at $192.00
  • 4-Stroke Starting at $384.00*
  • CNC porting Starting at $595.00

    CNC porting is performed on a 5-axis CNC Mill-Port machine, with hand-polishing, driven by hours of flow-bench testing and development on a Superflow 600

    *Includes valve and seat recondition.