Cam chain tensioner mod ?

Cam chain tensioner mod ?, has anyone seen this before ?.

Also having trouble removing my engine mounts, the centre bolts will not pull out ?.

Looks like Kelly Cork’s Modified Nissan car unit. I am told he no longer makes them.

Is pushing down the best way to tension a chain?

The chain does not care. No case modifications needed. The tensioner ratchets in .030 increments so as not to constantly over tension the chain but just take up the slack.

Not sure what motor mounts you're talking about, but on a couple of them (not the ISOs) that attach to the cradle, I found that I couldn't get them out, or particularly, back IN, unless I did so at a certain point in the process of putting the bike on or off the centerstand - the holes don't line up correctly except at that point. So I had a helper slllloooooowwwwwwlly put the bike on the stand while I inserted the bolts.

This may be way off base but I throw it out there just in case.

Best of luck.