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
MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
relieving exhaust bridge for 125cc
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="EricGorr, post: 709937, member: 19611"] Actually some thermally challenged engines need as much help as possible. Oil holes in the piston are a good idea if deburred properly. Wiseco shapes the piston to add a bit more clearance at the bridge so the oil holes aren't too neccessary. Another thing that I do when I prep a cylinder before plating is to relieve the bridge and all around the exhaust port with a fine sanding roll. That way the plating thickness will be extra thick so when the bridge is relieved and the port chamfered, the plating doesn't wear out prematurely. None of the aftermarket plating companies do that because of the time factor. That was also the underlining thehe to an SAE tech paper that I wrote in 1999. We built a special liner jig with the ability to mechanically distort the liner to simulate thermal conditions of a running liner, so we could hone the cylinder before and after plating, then install it in an outboard engine block and have it straight and round with equal plating thickness. Mercury picked up on the idea and built a better jig with more sections and hydraulic operation. Theres a lot to making a 2-stroke top end more reliable for the hard useage and dirty conditions imposed by off-road riding. [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
relieving exhaust bridge for 125cc
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