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1997 cbr900rr bike was missing and backfireing pulled carbs cleansd and just before i installed them i eeked inthe inake and sure as **** the exhuast valve epshowed stress markes ireached in and it was loose **** i pulled head phweew nothing wrong with piston just the one valve is this a easy fix for machine shop?
 

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1997 cbr900rr bike was missing and backfireing pulled carbs cleansd and just before i installed them i eeked inthe inake and sure as **** the exhuast valve epshowed stress markes ireached in and it was loose **** i pulled head phweew nothing wrong with piston just the one valve is this a easy fix for machine shop?

Machine shop?
What needs machining?
Is the seat or guide damaged?
Did the valve seperate or the collets popped out?
You won't see an exhaust valve by looking in the intakes so I'm guessing you mean an intake valve?
Should be able to just drop another valve in and lap it to the seat.
It would be a good idea to pull the rest and inspect them through a loupe to ensure no others are on the verge of failing.
 
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