Skimming the cylinder head (NSR 125 R)

Grilzz · L Plate Warrior Joined: 20 Apr 2004 Karma :

Hello!

I'm new here so don't be angry if you have answered on my questions before (I didn't find anything useful with the "search" button).
I own a NSR 125 R (2001) for over two years now. It's fully derestricted and tops at about 100 mph and has 6 seconds from 0 to 60.

I am thinking of lowering the cylinder head, and I need to know if anybody had done this kind of thing before, because I don't know for how much 0.*mm can I "shave".
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McJamweasel · BCF Junkie Joined: 22 Mar 2002 Karma :

Hi,

TBH I wouldn't bother. The tiny performance gains would not be worth the decrease in reliability.
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BCF: Be yourself, just don't be an arse.

cagiva gezzer · World Chat Champion Joined: 17 Mar 2003 Karma :

How much you can take off depends on how much you've got to start with.

The std clearance is prob 1.4/5mm, while production tolerances can be upto 2mm.

1mm clearance is a good size to aim for, while they can run 0.8mm on stock gas.

You need to find out the squish clearance and the type of head gasket.
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"because one stroke isnt enough and four strokes waste two"