I've searched and can't fid answer - I want to replace this bolt - I'm ordering parts in advance of teardown, I understand there are 17 short bolts and 1 long one, which is the exposed one under the exhaust ports??

Thanks,

 

OK, I figured it out - the one 'long' bolt is the one with the logo on the head - that goes at the bottom on the sparkplug side. Therefore, the exposed bolt is a short one, no different from the other 16.