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Discussion Starter · #1 ·
Hi all, I've lurked around this forum for years when looking for advice. I was hoping my first post could be something positive like posting pics of the new paintjob I have planned, but unfortunately instead I come asking for help.
I have a 2014 Daytona 675R that I'm checking the timing and valve clearances on. Bike has about 35000km on it. So I'm putting the camshafts back on, I have the timing plate locking them in place and the pin inserted into the crank ensuring everything is lined up for TDC so I can reset the timing. And as I tighten down the bolts on the ladder cap something goes SNAP.
I look over and half of the slot in the exhaust camshaft has broken off. I fish the broken piece out of the radiator fan, and after freaking out for a bit I give the shaft a look over and think it's probably still usable if I can ensure it's correctly lined up when setting the timing. I take the ladder cap back off and try to line the shafts up again, being extra careful this time since it would seem they weren't sitting properly in the journals when I tried the first time. But the damn things won't line up.
The intake camshaft won't rotate around enough to line up with exhaust because the lobes for cylinder 1 make contact with the tappets. Hopefully my photos below will illustrate this well enough.
259955

259956


I thought maybe the shims were way out of whack so I removed them all to give more clearance and checked again, but they still won't line up without the intake cam starting to press down and open the valves on cylinder 1.
So I'm wondering if the intake shaft is warped, because I can't think of anything else that would cause things to fall so far out of alignment. Can anyone here offer any insight? Thanks in advance.
 

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Discussion Starter · #3 ·
Here's the sprocket side. Not much to note here because I've completely removed and reinstalled all this stuff with the intent of resetting the timing (I'm following the manual procedure and have all the tools including the stupidly expensive 0.6nm torque limiter). The problem isn't with the chain or sprockets because even with them removed, the slots can't be lined up as per my first post.
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Discussion Starter · #4 ·
The manual says that the intake valves open 27.49 degrees before TDC, so it make sense that the cam lobe would be pressing down on the tappet when piston 1 is at TDC (assuming it is TDC on the intake stroke, which it looks to be given the position of the lobes). But if that's the case then how am I supposed to insert the plate across the two shafts without it snapping like it did?
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Hi all, I've lurked around this forum for years when looking for advice. I was hoping my first post could be something positive like posting pics of the new paintjob I have planned, but unfortunately instead I come asking for help.
I have a 2014 Daytona 675R that I'm checking the timing and valve clearances on. Bike has about 35000km on it. So I'm putting the camshafts back on, I have the timing plate locking them in place and the pin inserted into the crank ensuring everything is lined up for TDC so I can reset the timing. And as I tighten down the bolts on the ladder cap something goes SNAP.
I look over and half of the slot in the exhaust camshaft has broken off. I fish the broken piece out of the radiator fan, and after freaking out for a bit I give the shaft a look over and think it's probably still usable if I can ensure it's correctly lined up when setting the timing. I take the ladder cap back off and try to line the shafts up again, being extra careful this time since it would seem they weren't sitting properly in the journals when I tried the first time. But the damn things won't line up.
The intake camshaft won't rotate around enough to line up with exhaust because the lobes for cylinder 1 make contact with the tappets. Hopefully my photos below will illustrate this well enough.
View attachment 259955
View attachment 259956

I thought maybe the shims were way out of whack so I removed them all to give more clearance and checked again, but they still won't line up without the intake cam starting to press down and open the valves on cylinder 1.
So I'm wondering if the intake shaft is warped, because I can't think of anything else that would cause things to fall so far out of alignment. Can anyone here offer any insight? Thanks in advance.
Hi
I realize this is an old post but I had the same problem and broke my intake camshaft in exactly the same way.
I figured it out and replaced the camshaft.
The problem is with the tightening sequence on the cam ladder.
Let me know if you still haven’t solved it.


Sent from my iPhone using Tapatalk
 
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