i just had a look at the head you bought and indeed i believe you are correct, it looks to be the preferred choice.
i would imagine that the 210cc reference is a minor oversight. the diameter is more important. whats more, the description on the scooter center site is much clearer and gives me much more confidence in buying that one...(whats the betting they're the same head anyway!!!??)
I'm just waiting to do a dry fit with the pinasco kit to measure the squish etc. i may then get one made...unless you can tell me that this head works like a dream throughout the rev range.
i think i'm reading that right by saying that the 57mm crank would not need a 1.5mm gasket, whereas the 60mm stroker crank would need 1.5mm gasket?
it mentions 1:11 without gasket...slightly too much in my opinion for the type of engine i want (a long distance tourer) I plan to aim for closer to 1:10, which is closer to the original ratio of both the pinasco and piaggio heads. Interestingly, the SIP MMW head has 1:10.5! choices, choices.
what set up are you planning/have you got? do you have the newer 2 ring pinasco too? I have the pinasco head aswell but im not expecting much from it.
ive read, with confusion, that the pinasco kit was, at one time, sold with a polinni type piston and later with a polinni piston. Im not sure how to identify, exactly which one i have!? Im still a little confused by all that. this is why i was asking which head is right as sip mentions the polinni piston.
what i do know is that id like a head which has been shaped to my piston, with around 1:10 ratio and no gaskets and a squish of around 1.6mm!
for your amusement only.....
im trying to keep mine looking as standard as possible, so no big exhaust or carb for me.
On my rally 200 i will have/have got :
mazzu race crank 57mm, pinasco piston barrel, modified head t.b.c., cosa clutch (beautiful compared to the old style) Lusso gearbox with standard gearing. upjetting, i have standard exhaust which has been just fine - a sito + which although it gives me another 10kmph i still hate the look and the noise (it also hangs too low on my rally frame), i have standard looking uprated shocks rear and front, conti navigators to keep it all the road.
I'll try getting hold of Larocca, he knows his onions and has been a great help in the past.
good luck with your project and with getting a reply!