When you say pulls, do you mean shims? As in the little spacers that sit between the valve stem and silver bucket, which the cam lobes press down against? If yes, then the shims can all be different sizes to obtain the right gap for all the intake and exhaust clearances.
The shims are 7.5mm in diameter and do not have to be from triumph. Companies like hotcams and KL make sets you can purchase, but you can also check eBay or search on Google to find distributors that sell even individual shims if you figure out what sizes you need.
When you talk about spots on your cams, you're going to have to post pictures of what you mean as I don't quite understand. So long as your journals aren't scored, you should be ok. Scoring will appear as lines or grooves along the circumference of a journal, the machined circular surface between the lobes that the cam sits on in the head and is clamped in place.
As to why your can chain feels so tight, that part confuses me a bit. The only device that controls cam chain tension, is the cam chain tensioner which is located in the upper right side of the head, when looking from the throttle body side of the engine. Sounds like your cam tensioner may be failing or perhaps one of the cam chain guides is damaged. What year is your bike as pre 2009 the tensioner were mechanical and 2009+ are hydraulic. What is the mileage on the bike? What are the clearances you measured for each of the intake and exhaust valves?
It is possible that one of your cams skipped a tooth on alignment and that could explain the extra noise to some extent as well as the sudden difficulty in starting the bike. If that is what happened, then consider yourself very fortunate as normally when this happens on a running engine, many teeth are skipped and it leads to catastrophic top end damage when the valves hit the piston.
Sent from my SM-G950W using Tapatalk