Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
FJR Motorcycle Forums
Technical & Mechanical Problems
Low mpg and slight power degradation
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
.
Reply to thread
Help Support Yamaha FJR Motorcycle Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="HaulinAshe" data-source="post: 1184158" data-attributes="member: 1875"><p>Carbon buildup around valve seats and on valve stems doesn't always translate to loss of compression during a low-rpm cold compression test. The SeaFoam treatment may not help a thing, but like you said, it won't hurt.</p><p></p><p>Your compression readings are not bad, not awesome, but like all compression tests it means a lot more with history for that particular motor and gauge combination. The fact that all four cylinders are so close is a good indicator that compression is not the issue and all four cylinders are probably healthy.</p><p></p><p>I still recommend plugging the PAIR system at the valve cover using plates. That avoids any issue of crossover between the two that share plumbing when you leave the hoses in place.</p></blockquote><p></p>
[QUOTE="HaulinAshe, post: 1184158, member: 1875"] Carbon buildup around valve seats and on valve stems doesn't always translate to loss of compression during a low-rpm cold compression test. The SeaFoam treatment may not help a thing, but like you said, it won't hurt. Your compression readings are not bad, not awesome, but like all compression tests it means a lot more with history for that particular motor and gauge combination. The fact that all four cylinders are so close is a good indicator that compression is not the issue and all four cylinders are probably healthy. I still recommend plugging the PAIR system at the valve cover using plates. That avoids any issue of crossover between the two that share plumbing when you leave the hoses in place. [/QUOTE]
Insert quotes…
Verification
Post reply
FJR Motorcycle Forums
Technical & Mechanical Problems
Low mpg and slight power degradation
Top