Yesterday happy today not happy valve adjustments =)

[FJ1100mjk]

the one written by yamaha motor company
It does not tell to remove upper fairing to adjust valves.It says remove upper fairings airinntake ducts.

Yep, mine does too.

[ribbert]

I dont know about haynes or clymer manuals ,but i use the one written by yamaha motor company 3rd printing .It says it is intended to be used by qualified yamaha mechanics.
It does not tell to remove upper fairing to adjust valves.It says remove upper fairings airinntake ducts .It dosent give any wrong info at installig the camtensioner either.
As i mentioned earlier when i checked clearenses i did a test and i got same measurements when lobes facing 180 degres away from the valves as when inntake and exhaust lobes facing away from each other as its says in manual,so its clearly possible to measure with the 180 degre away to.I however chose to use the workshop manual as its faster too.

TDC measuring is a legacy of pushrod motors where the postion of the cam couldn't be eyeballed. There is nothing unique about Yamaha's OHC motor and standard procedure is to measure 180 deg off the lobe, like every other OHC motor ever made.

Noel

[Old Rider]

Nope it says remove airducts and referes to how to remove them in the remove upper cowling chapter.Nobody is that stupid that they start to take off the hole cowling i hope =).

[ribbert]

the one written by yamaha motor company
It does not tell to remove upper fairing to adjust valves.It says remove upper fairings airinntake ducts.

Yep, mine does too.

They were two examples that came to mind from the forum, I have never read the FJ manual in any detail. I have kept about 20 manuals after my recent cull, about half car, half bike. The bike manuals are all factory issued and referred to extensively at the time when the bikes were new. They all share one thing, errors aside, making simple procedures difficult.

Noel

[ribbert]

.....Nobody is that stupid that they start to take off the hole cowling i hope =).

Well, I guess the guy that wrote the Clymer manual is that stupid.

Noel

[fnlyafjat51]

I have to agree with what has already been said. With any engine, you should set the valves from the base circle to get the most accurate adjustment. TDC is not always the best way. They could be as much as .020-.030" off the base circle at TDC, but not actually on the lobe yet. Best to play it safe.
Just my 2 cents worth.

Sure its never a good  idea to follow the Yamaha enginers advice in the fabric service manual  

If it's truly on the base circle of the cam, then that's fine. If it's not, then lash will be off. We deal with engineers on a daily basis at work building industrial electric motors up to 3000hp, and they get crap wrong constantly. They're not gods, and stuff can get misprinted.
Maybe this will help shed some light on it for those still scratching their heads about this this.
I know it's not a bike or a OHC engine, but the reasoning still stands. Sure it takes a little longer at first, but once you have done it a couple of times, it's not that bad. It still stands any way you want to do it, get the cam on the base circle. Pause it at 2:44 and read.
http://www.cpgnation.com/forum/threads/comp-cams-quick-tech-video-how-to-set-valve-lash.4986/