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Re: WORB-5 head
Posted: Tue Feb 12, 2013 9:42 pm
by LI150
ssteam177 wrote:With the malossi head I personally found the compression ratio too high at 12:1 so I switched to the mmw but if I was building one now I'd use the sip head
I have had all 3 head
My take on it is the malossi the compression seemed to high couldnt stop it pinking
The MMW compression was lower didnt pink but lost power
The sip head I would say the best part I ever bought for a Vespa
Re: WORB-5 head
Posted: Wed Feb 13, 2013 5:17 am
by Dryballs
Yep what li150 said
My setup is malossi 210 with self reedvalved casing and keihen 30mm carb and sito exhaust
It's a really rapid and torquey motor
Re: WORB-5 head
Posted: Wed Feb 13, 2013 5:52 am
by ssteam177
Yanker wrote:ssteam177 wrote:With the malossi head I personally found the compression ratio too high at 12:1 so I switched to the mmw but if I was building one now I'd use the sip head
Interesting: Is your's standard stroke? (12:1 is too high for me too!)
No it's 60mm stroke with the packing plate at the base of the cylinder( rd350 reed mmw2 reed block 30mm pwk carb 1650g flywheel 23hp)