Ma10 head

[pork]

Which one do I have? Iv read bits n bobs about higher compression heads than others

Iv got a micra L 1.0l 4 speed.

My bike carbs are almost ready to go on so I'm already looking at what else I can do.
So what can I do to the head and at what cost?

 

[pork]

Anyone?

 

[bobsp16]

it dosn't matter which one youve got there both the same if you want more power fit a skimmed 1.2 head for better flow

 

[aLLeKs]

polish the ports, skim the head, get a more aggressive camshaft.

 

[pork]

How much can I skim?

 

[frank]

How much can I skim?

the 4 speed 1.0 is only 9.5:1 pork, so 2mm with a better cam maybe ?

 

[pork]

the 4 speed 1.0 is only 9.5:1 pork, so 2mm with a better cam maybe ?

Cheers, could you recomend which companies to use? New to all this so have no idea who to ask. I'm in Luton if that helps.

 

[aLLeKs]

Is 2mm possible without knocking. I have a 5 speed ma10 and I always skimmed my head 0,5mm. I have a spare head which is going to be skimmed.
So if I skim the head 2mm which compression ratio would I get?

 

[frank]

So if I skim the head 2mm which compression ratio would I get?

you would have to work it out alleks http://www.race-cars.net/calculators/compression_calculator.html
my previous cga engine was 9.5:1 before the 2mm headskim

 

[aLLeKs]

thanks, but if I type in the standard values I get something like 1.9xxxx:1

 

[frank]

thanks, but if I type in the standard values I get something like 1.9xxxx:1

try for the 4 speed 9.5:1 (with a supposed small 2.5cc dish in the piston)
68
68
4
22
-2.5
1.2
and for the 5 speed 10.3:1
68
68
4
22
0
1.2

 

[aLLeKs]

Ah thanks, I made a mistake with the chamber cc