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
Yamaha MX & Off-Road Dirt Bikes
1983 Yamaha IT490 Reving Out Of Control *Help*
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="mathd, post: 1387542, member: 98299"] This is a 2 stroke model? Pardon my ignorence about old models. If the left crank seal/gasket is leaking, chanches are it is sucking air in and causing your out of control rev(this will probably end seizing the engine, no lube/inadequate fuel-air ratio). Usually a air leak into the crank/top end of the engine will cause this kind of trouble. Cracked carb boot etc. If the fuel line was that bad, make sure to clean the carburetor and the jets. If a jet is clogged or restricted by dirt this is really not good. You dont want any air leak to the carb and the topend/crank case (can do a leakdown test). This will cause high rev and seize the engine on a two-stroke. Dont start the engine again before you get repair done to it. Bad reed will make almost impossible to start. Crank seal are part of the crank/case of the engine, they must not leak. [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1983 Yamaha IT490 Reving Out Of Control *Help*
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