We had our 07 YZ450 lower end repaired due to transmission gear problems. Now when we are putting the top end back on we can not align the intake and exhaust cam punch marks with the proper links between the upper cam gear punch marks. In the Yamaha manual it shows 14 pins in the timing chain between the upper cam gear punch marks. We only end up with 13 pins between the upper punch marks. The tech who did the transmission repairs told us that the 07 gear were superseeded to the 08 gears. When we looked up the timing chains in yamaha they show two different part numbers for the 07 and 08 timing chains. Does anyone here know if this could be our problem and the tech put the 08 chain on. We are on top dead center on a compression stroke. We need help!!! My head hurts from trying to fix this.