You have to be careful as part of the contract between you and the insurer requires you to furnish " all relevant information " to the insurer about the use of the bike.
This is defined as any information which may have a bearing on the issuing or not of a policy to you.
The fact that you may consider the use of the bike on a track could be construed to be relevant to the premium quoted or indeed whether they offer you insurance at all.
I understand your argument about the lower third party aspect, but you are preaching to the converted here.
An easy counter argument to that statement is that we ride much harder on a track than the road and therefore are closer to the bike & riders limits therefore the risk of binning it and making a claim could be that much more likely.
When it comes down to it, insurance companies are bookies and they want the odds as long as possible in their favour.
You pays your money...........
Andy
[Edited on 14-5-2004 by Rushjob]