head skimming

[bombom]

Now i know that with a car when removing the cylinder head you get it skimmed, its it the same story with a bike?

bike is a gsf400.

cheers
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Current: 97 zx6r f3
Previous: suzuki gsf400 bandit

[jimspeed]

It depends on the reason for removing the head really, if its been overheating or had a blown headgasket then yes but if you are just stripping it to do the valves or rings etc then I wouldn't as it can effect the valve timing and compression ratio ideally you want to remove as little as possible from it to ensure it is flat.
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Hyosung cruise 125(passed test on, sold) Kawasaki el 252 (better than expected but sold on) Kawasaki GPZ500S first "big"bike.(sold) ZZR600 E5..Z750 2007,ER5, currently on a 2008 Enfield bullet electra x and loving it..
,"Alpha-9: Is there any correlation between dyno rod and dyno kits?"

[MickC]

[Paddy Blake]

I never did this but have read of people using grinding past on glass for slightly warped heads but I would not get it skimmed because the valves might hit the pistons and you engine is the wrecked.
1 Thousand of an inch on a bike engine is a lot compared to most cars.

[0l0dom0l0]

I had both the head and the barrels skimmed when I did the engine on the Fazer.

Total of 7 thou removed, god knows what compression ratio the thing was running. Always used decent fuel and it went like shit off a shovel!

You won't start mashing valves into pistons dw. I'd get the head skimmed after every time it was removed.
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CBT Passed: 30/08/2009, Theory Passed: 31/08/2010, Mod 1 Passed: 6/9/2010, Mod 2 Passed: 13/09/2010. Restriction ended 13/09/2012.

Bikes: 2007 Derbi GPR 50, 1998 Yamaha Fazer 600 (written off), 2002 Yamaha Fazer 600, 1994 CBR 600F, 2003 Triumph Daytona 600, Kawasaki ZX6R J1.....Current: 2006 Yamaha FZ6, 1998 Suzuki TL1000R and a Honda VFR 400 NC30.

[bombom]

im just going to be doing the valve stem oil seals as its using quite abit of oil.
my problem with getting it skimmed is finding where can do it as my local engineers said it would be too small to fit there machine.
suppose il have a ring round closer the time and get some prices

cheers chaps
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Current: 97 zx6r f3
Previous: suzuki gsf400 bandit

[Vincent]

The head will only need to be skimmed if it's warped or the mating surface is damaged.
the process Paddy describes with the grinding paste, ("lapping in"), is a very good idea if replacing a head gasket and something not many people seem to do now - sometimes regretfully if the new gasket goes again.

However, skimming the head can also inrease compression and power, esp if the timing is altered to suit.
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