Torque Values

Hello im new here and im looking for the torque settings for the XJ650 1981 4KO. I know i should have the CD but i never owned a Yamaha and jut had kwnoledge of it now.
i took apart the top end and one thing i noticed is that i dont see any marks on the camshafts is it normal?
Can someone help me?
Thanks

 

Don't have the torque settings with me but someone here will post them so just be patient. The camshafts do have marks. On the left side of the camshaft on the inner journal camshaft cap is an arrow. This should correspond to a dot on the camshaft when it is rotated to TDC. You may have to wipe the oil off the collar that is adjacent to the camshaft cap to see the dot. There will be one on each camshaft.

 

Thanks. I never did this to a bike im used to cars and usually in a car this marks are in the sprockets.

 

What do you think? Should we change the head bolts or not when doing this type of work in a bike?

 

I posted them here:
http://xjbikes.com/Forums/viewtopic/t=1 ... orque.html

 

No need to replace the head bolts unless there is obvious signs of damage or heavy corrosion. I've replaced heads a few times with no problems. Just be sure to get those copper washers under the right studs or oil leaks you will have!!! I'll try to post your torque settings in a bit. Hold on...

 

Are they the same for the 650

 

in this case i have to change the head bolts, they are corroded and lost that plastic cover.

 

Im sorry for asking but just 2kg in the head bolts!?
I have the 650RJ and the 650G service manual and it says 3.2Kg.
Is 2Kg ok?
Im finding this values strange not because they are wrong or not but because im used to cars and in a car it can be 6.5Kg in the head bolts.

 

Head nuts (lightly oiled, by specification) should be tightend to 3.2 Kg/ 23.1 Ft/lb as your manual suggests. I would not go with less since your probably reusing the nuts (which is ok so long as they are not cracked, stripped or heavily corroded). I'm still needing to post your spec table. I'm working on it but the baby woke and it was lunch time. I'll try to post A.S.A.P.

 

** Cylinder head cap nuts (oil lightly)... 3.5 Kgf/m or 23.1 ft/lbs.

I think you were looking at the wrong line.

These specs are for both 750 & 650 eninges.

 

I see what you are looking at!

That number is for the upside down mounting bolts that go from the head through the cylinder block.

 

Ok, I shot a few pictures, God willing they are viewable. If not PM me and I'll send you the JPG files. Crud, they are too big to post (common problem for me). Send me your email address and I'll post you the spec charts and pictures.

 

You are right i was looking at the cylinder head/block 8mm nuts. it made sense but the torque was to small.
Thanks

 

It is also good to know that the outer right side head bolts have copper crush washers that MUST be placed back on these studs. This is the pressurised oil galley from the oil pump. Sorry I didn't get back to you but I have been in the air all day. Not many cable modem connections at flight level 350. Thanks to Robert and Kyroclasm you were well taken care of!

 

First let me say thanks for all the help.
Second i just have one more thing to ask. Can you give me the specs on the piston grooves and piston rings or if you can send me a pic of the engine , clutch and transmission specs of the manual.

 

Thanks Robert for those pics. I noticed that you sent me two pics of the torque sequences, i already changed a few head gasteks and never saw that sequence,were you go from the outside to the inside its a bit ode. All the mecanics that i worked and all the manuals ive read say to torque it from the inside out and in two or three moves.

 

The torque sequence from the outside in is for removal of the head. The torque sequence for installation is from the inside out.

 

Ok. Didnt pay attention to the name on the pic.
Ups. :-(

 

Shot the pictures out yesterday, 7 of them. Let's see if they made it. Drop us a line when you recieve them Magolo.