Removing cylinder head

If you can breath through the cylinder with valves closed, that sounds like a major malfunction! If you blow into the cylinder through the spark plug hole where does the air go? Can you hear it escaping through the throttle bodies? Exhaust? Crankcase breather? That would help narrow down the problem.
If pressurizing cylinders, make sure each piston is at T.D.C., with valves closed and clearance between cams and shims. Leave one plug per cyl. installed. Then listen for air escaping and from where. I made a tester by brazing a fitting on a broken spark plug and hooking rubber hose connected to air chuck to charge each cyl..
 
This one?
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Yes
I thought that if that nut was loose it might tear up that keyway or what ever it is called.
 
IMG_20210501_120120.jpg IMG_20210501_120139.jpg IMG_20210501_132118.jpg IMG_20210501_132125.jpg IMG_20210501_132142.jpg IMG_20210501_132215.jpg

Okay, here's the current state of affairs: each exhaust valve bent, tiny scratches on the pistons, cylinders like new.

Chain blades okay, tensioner okay (1/2 engaged), sprockets okay, crank sprocket key okay (it's huge actually). But there's uncertainty about the chain: it measures 5mm short of the replacement limit, 145.82mm actual length across the 0-23 links with 13kg attached, vs 149.48mm, which is basically a full chain link.

Apparently, there are two versions of them cam chain, and obviously I already have the newer one with 3/4 blades per link compared to 4/5 blades. So, is the measurement of the service book with 149.48mm still correct?

The question why the chain jumped teeth, is still unclear, unless the service book's measurements do not correlate with my chain...
 
IMG_20210501_120120.jpg IMG_20210501_120139.jpg IMG_20210501_132118.jpg IMG_20210501_132125.jpg IMG_20210501_132142.jpg IMG_20210501_132215.jpg

Okay, here's the current state of affairs: each exhaust valve bent, tiny scratches on the pistons, cylinders like new.

Chain blades okay, tensioner okay (1/2 engaged), sprockets okay, crank sprocket key okay (it's huge actually). But there's uncertainty about the chain: it measures 5mm short of the replacement limit, 145.82mm actual length across the 0-23 links with 13kg attached, vs 149.48mm, which is basically a full chain link.

Apparently, there are two versions of them cam chain, and obviously I already have the newer one with 3/4 blades per link compared to 4/5 blades. So, is the measurement of the service book with 149.48mm still correct?

The question why the chain jumped teeth, is still unclear, unless the service book's measurements do not correlate with my chain...
Hi, sorry to ressurect an old thread but I have an 07 Rovket 3 and it looks like I have the exact same problem, timing jumped and looks like I have some bent valves, did you ever find out why yours jumped? Also the service manual says the head liners need to be removed when pulling the head, did you find that difficult? Thanks for your time!
 
IMG_20210501_120120.jpg IMG_20210501_120139.jpg IMG_20210501_132118.jpg IMG_20210501_132125.jpg IMG_20210501_132142.jpg IMG_20210501_132215.jpg

Okay, here's the current state of affairs: each exhaust valve bent, tiny scratches on the pistons, cylinders like new.

Chain blades okay, tensioner okay (1/2 engaged), sprockets okay, crank sprocket key okay (it's huge actually). But there's uncertainty about the chain: it measures 5mm short of the replacement limit, 145.82mm actual length across the 0-23 links with 13kg attached, vs 149.48mm, which is basically a full chain link.

Apparently, there are two versions of them cam chain, and obviously I already have the newer one with 3/4 blades per link compared to 4/5 blades. So, is the measurement of the service book with 149.48mm still correct?

The question why the chain jumped teeth, is still unclear, unless the service book's measurements do not correlate with my chain...
Hi, did you get to the bottom of this, I'm in exactly same boat.
 
Also the service manual says the head liners need to be removed when pulling the head, did you find that difficult?
I didn't do that.
Hi, did you get to the bottom of this, I'm in exactly same boat.
Nope, not really. But I suspect that the chain tensioner failed to do its job properly.
 
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