I know the chain must be the same is mine has 170 links [made by D.I.D in Japan] but there is some confusion going on as the guides I received are totally different to my ones,the guy at the shop needed to know my engine number because his parts list said things changed after a certain number????. When I fit the new chain I will mix and match the guides to get the most travel on the tensioner.
My old guides are fine just the chain is out of spec. I even got a second hand chain [$35]off bike that had done 7000kms but it also was out of spec, very strange.
I'm making a tool today to hold the cam shafts via their hex's not the sprockets which will be more accurate and allow better access and view of timing marks. Photos to follow.