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
While the engine's open
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="charismaticmegafauna" data-source="post: 368060" data-attributes="member: 665"><p>Heeding 'ionbeam's advice (Jake's, too) would be shrewd, imo -- a good visual inspection of all cam-timing aparatus: chain, guides, sprockets, and (most of all) tensioner assy. Actually, the chain can be measured -- total length between a number of pins -- (there may be a spec in the shop manual?). If not, there will be a spec for Morse Hy-Vo chains, in general (somewhere?). Also the plastic parts (guides) can be measured and compared to new (beyond just visual). But it's usually the tensioner that's the source of cam-chain problems -- and has been for decades. Ever since 'automatic' cam-chain tensioners came on the scene, there have been a certain percentage of failures (and some companies have retrofitted many times -- altho, not -- for the FJR). Racers used to take-off the automatic and replace with a manual cam-chain tensioner (or, modify the automatic to manual).</p><p></p><p>So, carefully inspect the tensioner (as 'ionbeam' says) -- good strong spring, no burrs on the plunger shaft, ratchet mechanism working propery -- if it's good, it's good (no problem).</p><p></p><p>No need replacing good parts with more good parts -- you need only replace the bad/worn parts.</p></blockquote><p></p>
[QUOTE="charismaticmegafauna, post: 368060, member: 665"] Heeding 'ionbeam's advice (Jake's, too) would be shrewd, imo -- a good visual inspection of all cam-timing aparatus: chain, guides, sprockets, and (most of all) tensioner assy. Actually, the chain can be measured -- total length between a number of pins -- (there may be a spec in the shop manual?). If not, there will be a spec for Morse Hy-Vo chains, in general (somewhere?). Also the plastic parts (guides) can be measured and compared to new (beyond just visual). But it's usually the tensioner that's the source of cam-chain problems -- and has been for decades. Ever since 'automatic' cam-chain tensioners came on the scene, there have been a certain percentage of failures (and some companies have retrofitted many times -- altho, not -- for the FJR). Racers used to take-off the automatic and replace with a manual cam-chain tensioner (or, modify the automatic to manual). So, carefully inspect the tensioner (as 'ionbeam' says) -- good strong spring, no burrs on the plunger shaft, ratchet mechanism working propery -- if it's good, it's good (no problem). No need replacing good parts with more good parts -- you need only replace the bad/worn parts. [/QUOTE]
Insert quotes…
Verification
Post reply
FJR Motorcycle Forums
Technical & Mechanical Problems
While the engine's open
Top