valve adjustment

[robclark63]

Hi everyone I am in the process of a valve adjustment and was wondering if the clearance is at the lower end of the limit should you replace the shim??

 

For example if my input clearance is at .004 should I replace that shim...

 

and

 

if the exhaust clearance is at .006 should I replace that shim or should I just keep these as is and replace the tight ones...

 

It looks like basically all my exhaust clearances are at .006 except for a few and my intakes are at .004, except a few..

 

Thanks for the input

[etcswjoe]

Personally I would but if you plan on doing the adjustment in 26K probably not.

[muffinman]

If its in spec I leave it no matter if its on the low or upper side of the clearance

I also keep a note of where they are whether I replace a shim or not that way I know next time if it has changed and which way ot goes

Jeff

[MiCarl]

If its in spec I leave it no matter if its on the low or upper side of the clearance

 

I also keep a note of where they are whether I replace a shim or not that way I know next time if it has changed and which way ot goes

 

Jeff

 

 

In spec is in spec.

[robclark63]

Thanks everyone!! Will keep records and in 20000 miles or so will check again:cool10:

[abusive throttle cranker]

Can someone please post a link to the entire process? I've tested #1 ok but after that? What TDC mark? I watch the lobes as I turn the crank and I'm confused. Cylinder #2 the lobes were at 9 o'clock and 3 o'clock. wth? Shouldn't they be like 90* apart? The exhaust should be open then the intake immediately after as the piston begins to descend......

The bike has 31,000 miles and was bought as a non running fixer-upper.

[RandyR]

There is a write up with pictures in the 2nd gen tech section. The engines are mostly the same. The specifics for the first gen are in the Yamaha service manual for which there is a pointer in the 1st gen tech section.

[robclark63]

after you find tdc 1 then go counter clockwise 90 degress then do cylinder 3, 90 degrees + 70 more degrees and you go to tdc cylinder 2, then 90 degrees more and cylinder 4 is in tdc...

 

Play with it a little and you will get it.

 

the sight glass only has tdc for cylinder 1 and 2, but like i said tdc for 2 is an extra 70 degrees or so...

 

hope this helps a little...

[abusive throttle cranker]

Thanks for the replies. I have the clearance specs but finding the crank position is dazzling me! I thought turning it counterclockwise was a no-no! And then your instructions are unclear. 90*+ 70 more *? what still C'clockwise? 90+70 in addition to the first 90?

I took it for granted I could finger it out but seeing #2 like that just confounded me.

 

I've seen the threads in the tech section but they don't address the crank/cam position.

[abusive throttle cranker]

T'hell with it- I'm overthinking this thing. I'll just turn the crank clockwise till both lobes are between 9 o'clock and 3 o'clock. Get 'er done!

[Squeeze]

Well, it's not that dramatic, It's 90° for the next Cylinder and additional 70° when then the next Cylinder is on the other Cylinder Bank. 70 is the front/rear Cylinder Angle of this Motor.

 

I'd highly suggest you proceed as it's in the Book. Otherwise, you'll end up with an unkown Position of the Cam. Since the Spec say what the Gap should be at the given Position of the Cam, it'll most likely be a different Gap where you place the Cam on your own Ideas. If you have a hard Time finding the T-Marks on the Flywheel, you could also take out the Plug and feel Top Dead Center of the Cylinder carefully with a thin Piece of Wood or anything similar. Just take it easy in there and don't loosen Carbon Residue on the Top if the Piston.

[abusive throttle cranker]

Thanks but I don't have a book. The PO said he had one but never sent it. I find the T marks np. I wouldn't think it'd be too hard. I can see the arrangement of the lobes with #1 at TDC. Then it shouldn't be too hard to turn the thing till the others are in the same arrangement. What is the firing order here?

[Squeeze]

1-3-2-4

 

The Link to download the Manual are somewhere here in the Board. Snoop around.

[abusive throttle cranker]

Thanks. Ok I'll do that. The tech section only shows testing clearance and removing a shim. No mention of setting crank position of 2, 3 , 4.

[Squeeze]

Well, i can't say it for certain, but iirc, the Cams were facing in different Directions between the Cylinder Banks. That's not a major Question, because if you proceed as the Book says, the Positions are a given Fact. It's not that hard to follow, just do it like it should be done and you're good in that Matter.

 

Manuals and such are here to find, look under First Gen Service Manuals ... http://www.venturerider.org/forum/forumdisplay.php?f=90

[abusive throttle cranker]

Thanks Squeeze. I did look at the manual. Your 90* turn- the manual says 180* lol. But thanks for the help and the link.

[Squeeze]

My 90 ° Turn ?

 

Please explain

[abusive throttle cranker]

Well.......somebody did. Ah Robclark in #8- then you too in #11. No matter- its always best to recheck and examine the manual too.

[Squeeze]

Well, with the way you say it, i'd better check everything what could be wrong within the Issue at Hand before answering a Question.

 

I was reffering to YOUR Question, by the Way, at least i understood it that Way, when you wrote "And then your instructions are unclear. 90*+ 70 more *? what still C'clockwise? 90+70 in addition to the first 90?"

 

I'll shut up now before i'll get carried away. Learn something new every Day.

[abusive throttle cranker]

Heck I dunno what I'm doing. 180 + 70 puts it(#4) right with the intake holding the valve wide open. So I put pencils into the plug holes and find TDC that way. And cracking off the tip of the lead in #3 too. Then I try flyinfool's tool and.........I can't finger out how to use it without the valve hitting the piston! I think I better quit before I hurt myself.

[camos]

I'm in the middle of trying to do this job. Been following Goose's thread for the 2nd Gen where he states the clearance is best taken on the compression stroke so I'm wondering how to tell when that is?

 

Did the #1 cyl from the T1 mark as per the manual and Goose's instructions then turned the flywheel 180 degrees for #3 cyl, then 180 degrees plus almost a 1/4 turn to the T2 mark which should be TDC for #2 cyl. However that put the lobes pointing down which means the feeler can't be slipped in. Seemed that I must be doing something wrong so I started over and now am getting different readings than the first time. That is probably conclusive that I'm not doing something right.

 

Anyone got any suggestions?

 

It's a beautiful sunny day here and it would be much nicer riding my Virago than poking around in the shop.

[Guest]

Look, your all doing it all wrong.....first you put your left foot in then your left foot out then your left foot in and you shake it all about..........Or the easier method.....click your heels 3 times while saluting the Dairy Queen sign......:smile5:

[abusive throttle cranker]

Thats like..........doing more than one thing at a time?!? Omg a disaster about to happen!

[ToyOdie]

I can't believe Ruffy just said that. I'm going over to his house next week to learn how to set my valves. Now I'm not sure if that's a good idea anymore. At least we'll be doing his first.

[camos]

Look, your all doing it all wrong.....first you put your left foot in then your left foot out then your left foot in and you shake it all about..........Or the easier method.....click your heels 3 times while saluting the Dairy Queen sign......:smile5:

Thanks that lightens the load a bit.

 

But not as much as carving a few corners this afternoon did.