I hate it when people have a long old technical discussion about something I am suffering and all of a sudden the trail goes cold... well it obviously means the person asking the questions has sorted it out but promptly didn't let anyone else know how they resolved it... Guilt your honour... to make amends here is the belated explanation.
All Sorted... Thank you guys very Much especially to Amorti, the JT sprocket was just the ticket, I sourced it from Gingerparts in the end but bang on, 17.5mm as it should be, no play and a nice new sprocket...
The JT website has changed so I will add the link to the diagram and part no you previously posted but it is a JTF297 for future reference.
My final thoughts after a discussion with my Local Honda Dealer, who, give him credit, accepted my sprocket back (despite being a "Special Order") no quibble when I explained I had found a mechanically better item (to which he agreed with my sentiment).
Some sprockets and bikes are just loose like that, (I know my XL's slops about all over the place thinking about it, just thought that was due to age..) and it will be within the tolerances etc of Honda to have a new sprocket move on the shaft. I guess it means only producing the one sprocket for multiple bikes saves dollars and it is better than being "discontinued". I am sure it would be fine and from the Dealers perspective they see it all the time and why should I, the lowly rider, worry about it especially as they would like to sell me a new CBR thou.. however from an engineering standpoint I would rather things were right and I wonder how the design team for the RC and NC 30 would have taken that sort of comment given the level of detail they went to.
Cheers All Alex
Conclusion: dealer supplied sprocket will work but JT very much better....
http://www.jtsprockets.com/catalogue/model/342
