Hi all
I've put this thread on a different section but had no joy, so possibly wrong section.

Anyway, does anyone have a decent gearing set up for Anglesey circuit, I'm running 45 rear 15 front,
Any ideas much appreciated.

Info for a lot of UK tracks here (no Anglesey though): viewtopic.php?f=58&t=42047

15/45 is the same gearing ratio (1:3) as 14/42, which is suitable for most tracks I reckon (depending on length of the straight).

14/42 was the preferred choice for my NC30 when I went there, so as Cammo says 1:3 ratio. Same for most all tracks in the UK except Snetterton which was 2 less on the rear.

45 on the rear is far too large and makes the bike sit low - as you have to run the adjuster as far back as you can or the sprocket is close to the swinger. In fact, I am impressed you got that 45 on there as I had one and fitted it, then sacked it as it was far too close to the swinger.

Get thee a 14t front sprocket and smaller rears - you win in so many ways - light sprocklets, lighter (shorter) chain!
Better angles for the chain vs swingarm pivot shaft - less reaction when the chain is pulled
can run the rear higher as you can rotate the hub in the swinger.

I ran 14/41 and 42 everywhere - Cadwell, Anglesey, Croft, Oulton, Mallory, Donington