I was doing my 100,000kms (60,000miles) service. So while replacing my timing chain I thought I would check the valve clearances. Glad that I did. Nil clearance on the intakes and one exhaust valve to tight.
So I removed the camshafts and took out one of the shims and noticed that the size was printed on the underside. So I measured the shim and it was close enough to the printed size.
Then using the chart in the workshop manual I tried to order new shims. The triumph dealer here in Australia told me that they are no longer available here.
So onto the web to find what else uses 25mm shims
Honda CB750, CB900, CB1000, CBX
Ventures and some older Toyotas.
Then to find a supplier. The following in Australian dollars
Honda dealer $20.43 each
Yamaha dealer $22.22 each
On EBay from America $11.48 each
After looking for hours I finally came across this site. http://www.precisionshims.com.au/
They are in Melbourne Australia and post worldwide. They only charged me $7.70 each. They make what ever size you require. So instead of only 2.70 or 2.75 they make 2.725 etc. Just mention you read about it on this site and they give us a discount.
While searching I also found the valve shim tool. In America and they send worldwide also. They also take paypal but email first. It is the same as the original but a lot cheaper. I was only charged $60.00 USD delivered. It works great. Again mention our web site for a discount. http://knlcycle.homelinux.com/shim_tool.htm
Both were very quick to send and great personal service.
I hate recommending people, in case something goes wrong, but this is a must for our bikes and I hope this information comes in handy for everyone.
Another handy tip is if you remove the camshafts remove all the shims one at a time and record the size and to which valve, so next time you check the clearance you can order the new shims without having to remove them. So keeping your bike on the road.
Best of luck everyone and I hope this helps.