This looks the business !
http://www.techtonicstuning.com/showpar ... m=109.912T
Had a nightmare this arvo trying to strip down the spare head ! Think i bought the wrong valve spring compressor,i got the one for valves the are flush with the top of the head.But i needed the one for valves that are an inch deep

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I got round it by using a spark plug socket on the valve cap,no ideal,and there is no way i can put it back together now,without the propper tool,anyone know which one i need ?
After a good clean up what i thought were cracks were just marks on the head

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All looks to be in pretty good order really,valves were tight in the guides,don`t show any sign of wear etc.
Popped them in my dril and gave them a clean with some emery paper

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Need to get some carbide burrs,and a Makita varible speed die grinder next,going to chop out the guide boss,so it`s flush.once i have had the guides removed,new guides will be bullet nosed for extra flow !
I also measured the head limit it can go to is 132.60mm my head measures 135mm,so i will be fine getting 40 thou off,going to get them to broach it to make sure it`s flat,prior to the skim,but skim will be te last thing i get done,along with getting the gasket faces skimmed too,will get new s/steel studs for it too..
One other thing i noticed while stripping down,there were no oil seals fitted to the valve stems ? do they fit ontop of the guides ?
Another edit !
Just measured my valves with my calipers ! it does not add up !
According to haynes book of lies my inlet should be 40mm but it`s 41 ! the exhaust should be 33mm but it`s 35 ! The valves all have T-T stamped on them ? could this head have been played with already ? Looking at the inlets and around the bowl under the seat,looks like its been modified,not half as wrough looking as the example i saw of a dx head prior to work being carried out !
Just found out that The Slick 50,fabeled heads had 41 in 35 ex ? could it be one of them ? And just found out T.S.R pack D heads have the same valve sizes,if it`s been ported it`s been done very subtly
6 point cage,Koni`s,lower front brace,rear brace,goodridge hoses,4,2,1,supersprint back box,k+n,kent gs2h,vernier,skimmed and ported head,alloy fuel tank.catch tank,Short shift ,9A soon.
