valve clearance check query

I’m hoping for some advice on a mechanical issue please:

Yamaha requires a valve clearance check at 43000km (roughly 26000 mi). I have 43000 km now on my bike, a 2009 R1. However my valve clearance was checked at 18,500 km (roughly 11,500 mi). Let me explain: I had a manual cam chain tensioner installed at 18,500 km. After removing the stock tensioner and installing the manual one, the bike would not start! The tech assumed it was just plug and play. Indeed he had installed many tensioners before. However it appears this motor requires one to line up the crankshaft with a reference mark under the timer cover before removing the stock tensioner (later I discovered this is stated on a YouTube video by APE, the tensioner vendor, and the Yam shop manual). The tech thinks the cam chain skipped a tooth; you should have seen how mortified the tech (a friend) was when the bike wouldn’t start!

He then tore the intake stacks, etc down and retimed the cams. Since he was already “in there” he checked the valve clearances.

My question is should I have the clearances checked again now at 43,000 km or can I go 43,000 km past the 18,500 km when the valves were initially (although probably unnecessarily) checked (to 61,500 km)? I hope someone can offer advice, Thanks!  

We're hoping that if it did "skip a tooth" that there were no valves tagged. That could cause difficult starting by itself...

Generally, the valve seats should have "settled in" to the cylinder head by that time, so if the clearances were properly checked and adjusted if necessary, you should be good to go for another 26,000 miles (61,500km).  

Thanks for the reply. I appreciate it Kent!
If a valve was tagged would the problem be a noticable drop in power? It just happened to be dynoed before and much after the incident and it makes the same power...

You comment: "That could cause difficult starting by itself...", you didn't mean it would cause difficulty starting the engine did you? I'm guessing you meant if a valve was tagged, that in and of itself would be a major issue?

Thanks again!  

Yes, there would be a noticeable drop in power if any valves were tagged, so if the dyno shows no difference in power, you're OK.

If any valves had tagged, the engine can be hard to start because the lack of combustion chamber sealing would make getting a rich enough intake charge to ignite difficult.  

You know Kent, the crossplane is kind of a hard starter; it turns over slow and always took a few revs to catch, even when new. I noticed a fellow 09 owner complain of the same thing.

What makes me worried,if anything, mine does seem harder to start now (when cold); I just changed the plugs and it's marginally better starting cold, but still needs to turn over a lot. When warm, however,  it flashes right up;

If the valves were tagged, could  it start better when warm or would it be difficult to start under all conditions?

The dyno comparison isn't as scientific as we'd like( the dyno is the same at least). Pre incident it had a custom mapped PCv, stock ecu. Post incident, I had a reflashed ECU sans PC. Post incident it has a few more hp( because of the ECU) but less max torque,  because it doesn't have the PCv and custom map? , or here comes the neurotic idea: less total torque due to poor combustion chamber sealing??? Now I'm worried...

Thanks for the sharing your advice; I know this isn't required but  I'm getting a friend a new gift subscription to SR in exchange for all your great help  

The only way to know for sure would be to do a compression check on each cylinder. But to tell you the truth, if there was a compression leak due to tagged valves, you'd notice a distinct power drop that the reflashed ECU wouldn't be able to make up.

In my experience I've found that the crossplane R1 needs a little throttle to fire up quickly. If I try to start it without any throttle, yes, it needs to turn over for a bit before firing up; but if I crack the throttle a tad right after hitting the starter, they seem to fire up right away.  

Thanks for the advice...cracking the throttle helped the starting. Thankx!!!