can't get timing right on yfm200
#1
can't get timing right on yfm200
The short version of the story is I needed to replace the cylinder head. Now that everything is assembled, I can't get the sprocket to set directly at TDC once the tension adjuster is installed. The TDC line on the cam sprocket either ends half a chain link before or after TDC point on the cylinder. I've strapped the ratchet to the frame so the crank wouldn't move,and I loosened the valve adjustment screws so the rocker arms would be loose. I've also tried setting the sprocket forward TDC by one tooth because I thought it would end up correct once the tension adjuster was installed but it still ended up half a tooth forward.
Any help would be really appreciated. I've been battling this for about 3 days now.
Any help would be really appreciated. I've been battling this for about 3 days now.
#2
#3
I've worked on a lot of Japanese engines over the years whether they be single or dual cams that you just couldn't get the marks to line up perfectly even if you had a new cam chain and sprockets. On some dual cam models one sprocket mark would be parallel with the cylinder head,the other sprocket mark may be up a little,but as close as you could get it.
#4
#5
#6
Don't think it would matter that much either way,but when I came across one like this, just out of habit I would leave it 1/2 tooth advanced rather than retarded. But that's just me..
#7