Home
Basic Dirt Bike How-To's - Video
Dirt Bike How-To's - Video
Living The Moto Life - Video
Bike Tests | Shoot-Outs - Video
Forums
What's new
Latest activity
Log-In
Join
What's new
Menu
Log-In
Join
Navigation
Install the app
Install
More options
Close Menu
Forums
Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Wisco high comp or 480kit?
Reply to thread
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
[QUOTE="Rich Rohrich, post: 697232, member: 16241"] Billy Frank (aka BillyWho) went with the stock bore high compression piston on his 03 CRF and really liked the difference. That piston and a properly designed pipe can really fill in the low end and mid-range without clipping the top end revs. I personally like the characteristics of the 480 kit and porting best of all. It will lower the peak torque rpm by about 500-800 rpm, but for most of us the additional torque and the willingness to pull taller gears is a worthwhile trade off. The cylinder head comes from Honda in really good shape so all that is really necessary is a clean up of the throat of the ports and the area that blends in and out of the valve seats. They also respond nicely to a multi-angle valve job when it's time to resurface the seats. The only real downside to this engine is the intake valves wear fairly quickly and they can't be resurfaced, only replaced. Kibblewhite makes a stainless steel replacement intake valve and spring kit that has much longer service life and allows resurfacing of the valve in the future. The exhaust valves can usually be cleaned up and the seats resurfaced under normal use. [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Wisco high comp or 480kit?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top
Bottom