Goddamn, what I was expecting to take 30 mins (since it's my first time) ended up taking 2 and a half hours. I got myself a set of feeler guages yesterday cuz I knew I had a bit of time to check stuff today, and I want everything to be working well for BB. Plus, the engine has been noisy lately, and it seems to be coming from the head. Anyway, 2nd step: remove valve cover. The fugging thing did not want to come off: it didn't fit between the frame downtubes. I won't bore you with the details, but suffice it to say that dropping the ENTIRE engine a bit in the frame was needed in order to simply CHECK CLEARANCES . Of course, wooden blocks and car jacks were needed to support everything as I dont have any real stands <grumble>. Anyway, almost all of them turned out to be tight, theyve probably never been checked. Just felt like venting a bit as I was supposed to finally get a decent amount of sleep today .
Since theyre tight, they wouldn't have been making any noise, right? Does having the proper clearances help performance in the least, or is it soley a maintenance and reliability thing? Lastly, are all Yamaha valve shims the same, or will these be hard to get / trade at one of the local shops? And is 30k + 15 years long enough for the CCT spring to become weak? Is an APE manual tensioner worth it? Thanks