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
Yamaha TTR125 CDI
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="DualSportr, post: 118494, member: 19592"] Great! I think you've finally found a way to take this bullet-proof little bike and make it into a hand grenade. Higher rpm's don't make the TTR faster. Do everything else right (bore, cam, valves, springs, etc), gear it right, and you'll have a faster mini than any other out there (just ask Powroll and BBR). The addition of more rpm on this engine would require a few things to even allow the engine to utilize it - 1. Different camshaft than what's currently available (and works very well, by the way). 2. Much heavier Valve Springs 3. Stronger valves (stainless or ti) to handle the heavier springs 4. Piston to valve clearances of much more than you have currently. If piston to valve cl is currently in the .050" range, you'd need to go to at least .070" or greater. Also the valve to valve clearance would have to be increased. If you're hitting the "rev limiter" right now, it's not in the ignition, it's in your head! Or I should say, your bikes head, you're floating the valves. High rpm needs to be worked in with other modifications. Just becuase an engine revs doesn't mean it makes power. Conversely, an engine that only revs to 8,500 rpm can make considerable power. Higher rpm in an engine not designed to take it is the fastest way to break a four stroke -- well, other than running it without oil ;) [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Yamaha TTR125 CDI
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