hi,
cbr 400 nc23
In the process of a gearbox rebuild after a spill at anglesey which damaged gear selector drum, thats all sorted now but in the process i rotated the crank and it popped up out of the casings and put the timing out of sync. I have obtained tdc buy putting a dowel down plug hole, as the rotor is not fitted as its total loss. Have re set cam shaft positions via the manual having ex facing mating face of rocker/ barrel and inl facing inlet mating face, i have checked valve clearances and some are out .
cylinder 1: inlet. 0.10&0.05 ex: 0.15&0.15
2: inlet. 0.10&0.15 ex: 0.15&0.15
3: inlet. 0.15&0.15 ex: 0.15&0.15
4: inlet. 0.15&0.15 ex: 0.15&0.15

the recommended Is inlet 0.12 to 0.18 and exhaust 0.17 to 0.23 according to haynes
am i right in thinking best gaps would be 0.15 for inlet and 0.20 for exhaust ? this is my first attempt at re shimming valves so any advice greatly appreciated also this is for a race bike so is there an optimium clearence i should stick to. for an nc23
cheers rigs

I would go ever so slightly larger gaps than std fr a race bike.

I set my NC30 race bike to .20 inlets and .25 exhausts when they are .12 to .18 and .21 to .27

It works...

Your reasoning is quite right for aiming into the middle ground. Why don't you re grind the vavles in before you set them - you then know you have a healthy top end..