Who has an Ivans kit fitted and be willing to let me try it ?

[FuZzBoM]

Mine is Ivanised and although it did improve the general feel of the bike I found the 4 degree ignition advancer completed it for better midrange grunt. you sacrifice a little on the top end but I very rarely rev mine to the redline
It also starts much better than before and is said to improve fuel consumption a little. I Have noticed a very slight improvement in fuel consumption but it is minimal the way I ride.

for £14 and the price of the gasket its a cheap and easy thing to do. and worst case if you don't like it convert back to the standard one and sell the 4 degree one on here.

http://www.ebay.co.uk/itm/YAMAHA-FZ1-R1-...2583a4c6cc