How much of a pain is it to install the cylinder head (not the piston jug) while the engine is still in the frame?

 

It is about a 2 hour job. Takes about 4 hours to R&R a top end from a 660 to 686 after all the parts are ready.

 

R&R ??

 

Remove & Reinstall

 

yeah.......das bout right.........it took me almost 2 hours to change my headgasket.......

 

Hmm....seems like a lot of work when you tear into a rappy.

 

Thanks guys!
I have everything I need to put it back together with the exception of the 2 valve cotters that shot out like bullets when I was disassembling the cylinder head. While I am waiting for the parts to come in I figured I could reinstall the engine, swingarm, oil lines, etc... I just wanted to make sure it isn't too difficult to do while the engine is in the frame. Just trying to speed up the process.

 

A tad more time consuming than if the engine were out. Still easy enough to do.

 

Just curious why you took the engine out?.?.?.?
You don't have to take it out to get the cylinder off and since you have an 03 listed in you sig I figured it wasn't for the tranny.[img]i/expressions/face-icon-small-confused.gif[/img]

 

I was out thrashing on my Raptor for a few hours one day and I started to hear a ticking sound so I parked it for the night. The next morning I adjusted the valves and the ticking was gone so what do I do, beat on it some more of course. Soon thereafter the engine started ticking again. Instead of tearing it down to insopect it I decided to wail the snot out of it and see how much abuse this machine could take. Well after a couple more hours of serious riding the valve train finally gave way and my center intake valve came in contact with the piston. I had it towed home and stripped it down. It seems that I was jetted a tad rich which caused quite a bit of carbon build up on the piston and underside of the cylinder head. A chunk of carbon flaked off and somehow lodged into the intake valve preventing it form closing which in turn made contact with the poston. When I added the I jetted it to the pipe without the sperk arrestor. When I added the arrestor a couple days later I never bothered jetting down a notch.
No big deal, I had all the parts ready to turn it into a 686, I was just waiting for the right opportunity.
In other words, it broke from neglect. Yamaha made a very durable machine.