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
Canadian Daves JustKDX
overheating
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="Canadian Dave, post: 950416, member: 16102"] red, Over heating is often the result of a lean condition. The incoming charge of fuel draws heat from the piston, not enough fuel therefore = high piston/engine temps. Given the age of your bike its likely safe to rule out a mechanical problem causing an air leak which could result in a lean condition so lets look at your jetting. Let’s start with our fuel. Changing the pre-mix ratio from 30:1 to 40:1, for example, increases the amount of fuel thus richening the mixture reducing heat. Given you are running a synthetic oil I would have a look at the oil manufactures recommendations for an indication of what ratio it was intended to support. Personally I run 42:1 with good results. Once you decide on a ratio try fine tuning your jetting. Boyesen reeds will make your engine run leaner on the bottom and richer on the top therefore from the jetting you have indicated I would start by richening your pilot circuit. Richen your airscrew (turn it in) and see if that helps. I’m guessing you’ll find it works best at around .75 turns out. If you are still not happy with the results try changing the pilot jet from a 42 to a 45 and play with your airscrew again this time you’ll likely need to lean the pilot screw/ turn it out. Rather than looking at your plug to check your jetting at lower throttle setting (the pilot jet has the greatest affect at lower throttle setting) go by feel. Cylinder scavenging is poor at lower rpms ( I’m assuming you are running at lower rpms in technical conditions were you are overheating) so a plug reading isn’t very useful when file tuning here. David [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
Dirt Bike Discussions By Brand
Canadian Daves JustKDX
overheating
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