Took to yamaha dealer.
Knowledge guys, they said to invest in head and rocker box. They also noticed that the valve springs were upside down.
Seems more problematic to mill this head and hope it doesn't get milled to far.

Jjrider
Let me know if you want to sell a head and rocker box.

Greg

Why?

I agree ^

From what I can see it can be salvaged. If you want send them to me and I'll fix it , not a problem. If the scratches are deeper than they look in the picture I can weld them up and then faced so minimum taken off.


Summers wasting, time to get back riding.

IMO I think welding the head will soften the aluminium in that area, increasing the chance of future head gasket leakage, especially where the flame ring seals.
Once the welded area has been softened, there is also the risk of the exhaust valve seat next to it coming loose.

Bob

It can be done.

Here's a sample of head/rocker box if I go that way.
Yamaha TT600 Cylinder Head Valve Cover Rocker Arms TT 600 83 86 | eBay

That head is cheap enough, good also that the rocker box is included. Some on eBay separate them to sell them individually. Bad idea...

Won't fit your '89 cylinder. "88 and '89 have a different hole pattern.

Plus the one cam bore is wobbled out, mostly on the rocker cover side. Side of the cam chain

So my options are for only an 88/89?

I know the rocker box had an extra bold but i didn't know there would be a problem bolting the head to jug. Thanks for that!!

http://www.ebay.com/itm/231637695366...witem=&vxp=mtr

If this is a good fix I would get this. But not the right years right....
Please let me know :)

best
Greg

Only the ones off an '88 or '89 will fit your jug, unless you get an older jug, they all fit on any year bottom.

The tell tail difference is that second bolt on the end of the cam chain tunnel. The newer ones have a bolt on each end, the '87 and older only have the bolt on one end. The 2 studs around the bore are spaced different also.


I was eyeing that last one for a while, looks in good shape, waiting to see if he comes down a bit .Don't really need it but if cheap enough. I'd prefer the newer style.

Don't know if my jug is original. Here's pics
https://www.dropbox.com/s/6xm6d02o7w...94518.jpg?dl=0

https://www.dropbox.com/s/hb8ffkh0ds...81%29.jpg?dl=0

That's a '84-'85 jug.


Didn't you post about the valves being new or reworked on your current head ?

So I should be able to use 83-89 heads?