I have a Yamaha WR450F 2008, I have just stripped the shims out as the bike was a nightmare to start. All the inlet gaps are less than 0.05mm, two shims are 1.2mm and the third is 1.35mm. So I have worked out I need two 1.05mm shim's and a 1.2mm. The Hotcams Shim Kit I have ranges from 1.2mm to 3.5mm. Does this mean I have run out of shim range, if so can you advise what is needed to resolve this matter. I presume I need new valves, but is there anything else I need to change, springs, valve seals, and which products standard Yamaha or any preference to aftermarket products? I only started to race endurance this year and this is my first dirt bike so I would really appreciate any good advice.
Thanks in advance