another cam chain/ valve adj. issue

Yamaha FJR Motorcycle Forum

Help Support Yamaha FJR Motorcycle Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
A question for Howie:

Is it not possible to advance or ****** the chain on the exhaust cam sprocket without removal of the cams? Or is the clearance to the front chain slipper just a bit too tight? Sounds like the chain can be moved on the intake, just by backing off the CCT .

In the auto cam chains I've worked on, you could work a link around from the slack (intake) side and over the intake, putting slack between the cams, and then over the exhaust.

 
A question for Howie:
Is it not possible to advance or ****** the chain on the exhaust cam sprocket without removal of the cams? Or is the clearance to the front chain slipper just a bit too tight? Sounds like the chain can be moved on the intake, just by backing off the CCT .

In the auto cam chains I've worked on, you could work a link around from the slack (intake) side and over the intake, putting slack between the cams, and then over the exhaust.
Damn good question, Fred, and the answer most assuredly is yes, because you can slide the front chain slipper out through the top of the head, at least on my 04 mill. Then, with the chain de-tensioned, you could move all the slack to the exhaust side, allowing you to turn the exhaust cam without turning the crank. Line up the exhaust cam, pull the chain tight between the exhaust cam and crank sprocket, and slide the slipper back in.

I attempted that last night just to see if it could be done. Didn't mention it 'cause I didn't want to "muddy the waters" with my explanation. With easy-to-see reference marks placed on the back of the exhaust cam sprockets, one should be able to get the exhaust cam and crank lined up very easily with a slack chain. It just seems to be the intake cam that's the PITA because all the chain slack is on that side. But at least the timing marks on the intake are easy to see, and as SkooterG noted, the oiling holes in the bottom of the cam lobes are clear timing indicators as well.

It's just SO much easier to **** around with the intake cam than it is the exhaust cam if it doesn't match up. Do the exhaust first!

 
My solution, (read cam timing for dummies) was to pull the exhaust cam and transfer the timing marks on the sprocket that you can't see, to the inside of the sprocket. Just make a little mark with a small file on the inside of the sprocket. Then it's easy to see that it is lined up with top of the head. To me that is the only way you can be sure the exhaust cam is timed correctly. Also, when reinstalling the exhaust cam, be sure the cam chain is taut on the front side of the engine.

 
@Howie again - if ever I have problems in Australia expect to find an airplane ticket in the mail :rolleyes:
I am SO there!!! :D

My solution, (read cam timing for dummies) was to pull the exhaust cam and transfer the timing marks on the sprocket that you can't see, to the inside of the sprocket. Just make a little mark with a small file on the inside of the sprocket. Then it's easy to see that it is lined up with top of the head. To me that is the only way you can be sure the exhaust cam is timed correctly. Also, when reinstalling the exhaust cam, be sure the cam chain is taut on the front side of the engine.
Gunny! Mentioned earlier.

 
That's a nice karma payment howie offering to go down to help, good on you.

Thank you very much for taking the extra time to go back and take all the pics. I have never even seen the inside of my feej but with your clear explanation and useful photos I would not fear having to tackle this job in the future.

I feel my donation to your cause has been paid back in full, I still call dibs on the manatee though.

 
Update and final resolution

Spent almost all day (wed.) at the dealer. The first half of the day got off to a really bad start when the serv. mgr. DENIED that what we both saw was an exhaust sprocket out of time by one tooth. His position was that it may have been slightly off but this could be explained by a number of things, especially on an engine with 79k. Also since this is such a small degree off that any adjustment he made to the exhaust sprocket and chain would just get transferred over to the intake. In other words it's just slop in the system and thats just the way it is with this high a mileage engine.

Fortunately I had done my homework (thankyou teachers) and whipped out the pictures of Howies cam sprockets (one in-time, one out of time).

I said, " Are you going to stand there and tell me when we looked in the mirror at the exhaust cam sprocket that this I'SNT exactly what you saw" ? He said that it wasn't off nearly that much and anyway that when they rotated it back the other way the result was it was off just as much only in the other direction, and did I think they were so stupid they don't know what they're doing, did I have any experience as a mechanic, did I realize how insulting it was for the mech. to be told how to do his work from stuff on the internet, he's got alot of other work to get out so what do I want to do? He also intimated that he was going to have to charge me something for all this extra time they were spending on this. This was not going well but....

Fortunately I had done my homework (thankyou teachers) and knew exactly what the problem was and how to fix it. I told him I wasn't paying for anything and if he thought otherwise we'd need to go talk to higher-up NOW. I also told him I didn't agree with anything he has said so far and I don't want the bike back as it is, I want it FIXED. I had to repeat over and over about taking tension off chain, time exhaust cam first (easier if you transfer marks to inside of sprocket), get it PERFECT, zip tie it, now do the intake. Everything should line up nicely and if there were any of the other problems he was claiming they would show up here. Thats all you have to do, just line up the exhaust cam (you know, the one where you never checked the arrows). Thats it, just do that first. You know how to do the rest......over and over and over.

Finally mech. that had been working on the bike finished up what he'd been doing. The serv. mgr. walks over to him and tells him what I want done ( I couldn't hear), probably mentions the internet. At this point the mech. has a minor fit, raises his voice, throws something and proceeds to yell at the s.m. After letting him cool down a few minutes, the s.m. waves me over to explain my theory to the mech. The mech., after alot of head shaking with one of those smirky condescending mocking grins says " I don't tell you how to do your job, but you're going to stand there and tell me how to do mine"? I said I was only going to tell him the part about the cam timing since that seemed to be where the problem was. ( he really liked that) He finally said " f..k it , go ahead , tell me what you want done, ,, so I did.

Well, we all stood there while the mech. did his thing (hes actually very good) As he was attempting to time the ex. cam ( using those newly discovered arrows) I asked him if he thought it might be easier if he transferred the timing marks to the inside of the sprocket. (he really liked that too) but he did it. Now, I thought, I'm really getting his respect and he'll do as I say. Now he gets this done and its difficult to see the line-up on the ex. cam. The s.m. looks at it, the mech. looks at it and they both declare it's as close as it can get. They also declare it's exactly the same way it was when they started this whole thing so it was done right all along. ( meaning I was a candidate to pay for this fishing trip) Another mech. came over, looked at it and said things like this aren't always perfect and you just got to do the best you can with what you got. Everyone was in agreement that this was as good as it could be done. But........

Fortunately I had done my homework (thankyou teachers) so I whipped out my dental mirror, borrowed their flashlight, and inspected the timing arrows on the ex.cam. You know what?? They were exactly like they were originally. ONE TOOTH OFF ! I got the angle and the light just right, called the mech. over and said " Don't you think the arrow lines up with the next space down better than where it is now?? he gave kind of a nerveuos laugh and said "Yeah' I guess it does"

It took me all day Tuesd. and all day WED. to get to this simple place- a dead nuts on timed bike.

A special thanks out to RadioHowie and HaulinAshe who gave me the ammo. to get this done. Howie's pictorial etc. is a must read for anyone having valve/cam/chain work done and should be in the Bin-o-Facts. If I didn't have all this info. at my disposal , the dealer would have snowed me with all that noise and I'd never have known.

 
I have been waiting nervously for this update all day long.

But you left out the most important part.....how does it run? Do I need to plan a ride? Do you have a spare couch? Is there a Taco Bell nearby?

I hope those boneheads learned a lesson or two.

Good for you for sticking to your guns!

 
Abso-freeking-lutely. Big congrats to you on having the patience to deal with these *** munchers. And I will make the assumption that now that the bike is timed properly it will run as it should.

So, kids... What is the moral of this story?

Never let shop tards mess with your bike. Especially if you have no reason to believe they know what they are doing, like the thumbs up of another customer that has had similar (or worse) work done.

I find it appalling to think that 2 of the mechanics at this shop think that timing is a sloppy process. I would expect that from a store manager or sales schmuck, but the wrenches should have BOTH known better. The timing is either right, or it's wrong. There ain't no in between.

The truly scary thing is that guys like this that don't know what they are doing could have got the timing off by much more and lunched you top end out. Guess who would have been stuck holding the bag in that circumstance?

Very glad that it worked out for you. Now go reward yourself with some good riding!!

 
Howie

Anytime you want to come down, the chalupas are on me !!

Bike runs fantastic, no chain noise, valve clatter, no nothing. " Eager " would be a good way to describe it, whereas when mistimed it was "willing" but too tired.

By the way... They didn't even try to charge me. The serv. mgr said to me today as I was picking up the bike, " so it really was off by a whole tooth"? Sheesh.

 
Howie Anytime you want to come down, the chalupas are on me !!
You're ON! :D

Bike runs fantastic, no chain noise, valve clatter, no nothing. " Eager " would be a good way to describe it, whereas when mistimed it was "willing" but too tired.
EFFIN' A!!!

By the way... They didn't even try to charge me.
I would have burned the place to the ground if they'd tried that on me. :glare:

The serv. mgr said to me today as I was picking up the bike, " so it really was off by a whole tooth"?
Really? [SIZE=14pt]REALLY??[/SIZE] HAHAHAHAHAHA!!! What a maroon!
bugs-bunny.jpg


 
Last edited by a moderator:
It's a terrible thing when an ego gets in the way of reality. Even worse when several egos line up together.

You've definitely earned the right to have a good running bike. I would not have had the patience or discipline to endure what those guys put you through.

My hat's off to you for being a real man in the most difficult of circumstances. Yamaha really NEEDS to hear about your experience.

The offer still stands. Next time you need your valve inspection/adjust done, ride to my house. Yours is free.

 
The offer still stands. Next time you need your valve inspection/adjust done, ride to my house. Yours is free.
Jeff, you up for a transmission dogs undercutting session?????

(no, I'm not having a problem:))

However, I MIGHT need some help splitting cases on my Zrex if my worst fears come to pass and I need a new output shaft bearing! :dribble:

 
My hat is off to you sir there is no way after being talked to like that that I would have had the patience to continue. I would be in jail!

"you gonna tell me how to do my job?" yes dumb *** as long as I'm paying for it I am.

I just love a happy ending.

 
bhkfjr,

Very Glad to hear about your Success story. Just feel bad we have to go through sooo much grief just to get there.

Your experience parallels mine, the mechanics/etc are just tooo busy being in a defensive posture and just Not Learning or Listening... even when the Facts are clearly presented to them.

Thanks for Sharing and Many Happy Miles & Smiles on your now EAGER machine!

 
In retrospect:

This entire scenario was brought about because the mech. performing the cam timing didn't time the exhaust cam properly the first time in. They didn't check the arrows on the sprocket because they couldn't see them so they just got it close using the hole on the cam lobe. Even with me right there with them, after transferring the timing marks to the inside of the sprocket, he still timed it a tooth high and thought it was as close as they could get it. The exhaust cam was the ENTIRE mechanical issue. The rest was just human foible.

For others thinking they have cam chain issues, here are my exact symptoms:

Fire bike up first thing in AM- starts right up

High idle to normal idle (1100 rpm)- perfect

Ride 1 mile to stop sign, pull in clutch, bike loses idle, would almost cut out, I have to add throttle to keep it running.

Ride 3 miles to gas station, pull in clutch, bike holds idle- no problem

Rest of trip- 3-400 mi. no idle probs. BUT there are intermittent times when I could hear excessive noise coming from right side of engine. This is an ongoing issue for about 20k miles or almost an entire YEAR.

Excessive noise is becoming louder and at more frequent intervals. Bike still wants to cut out at that first stop sign, EVERY time when starting out for a ride and every time, that symptom goes away when I get to that gas station!

the CCT never actually failed, but it wasn't functioning properly either, it was gradually getting worse.

Hope this helps someone!

 
the CCT never actually failed, but it wasn't functioning properly either, it was gradually getting worse.
bhk,

SOOO glad things worked out positively for ya.

I'd only have to take exception with your very last sentence. "...the CCT never actually failed..."

As far as I'm concerned, when the chain starts making noise, that to me say the CCT HAS failed, in that it is no longer doing its intended job. It has only one function....to keep tension on the chain. When it can no longer do that, it's failed. Perhaps not catastropically like mine and others, but failed nonetheless.

Glad you're back on the road. You dodged a big, expensive, heartbreaking bullet.

 
Top