BGM 12HP 200 any good?

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Bofs
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Main scooter: Zundapp Betta 500
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Anyone running the BGM "12HP" top end on their P200?
Is there a noticeable improvement over the standard top end?

Not interested in kits, just a boost over standard. Have a SIP Road 2 fitted already.
Muffspeed....no muff too tuff
Bad Samaritans SC

1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
RGC GEOFF
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Main scooter: Vespa GTr BGM 190
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That's a very good cylinder and piston. Actually it's shortened 0.7 mm and you don't have the stupid standard p200 gap between the piston crown and the cylinder head. Add to this cylinder the MMW cylinder head and it will be a perfect combo

https://www.sip-scootershop.com/en/prod ... r_13013930
Built not bought...
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Bofs
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Main scooter: Zundapp Betta 500
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Have you used that set-up before Geoff?
Muffspeed....no muff too tuff
Bad Samaritans SC

1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
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GTFOMWSC
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i have a barrell and head but need a piston for it couldn't find one,previous owner said it was a good set up but he also couldn't find a piston either.Pity as i'd love to try it on my P2
the man don't give a f@@k
RGC GEOFF
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Bofs wrote: Thu Apr 26, 2018 11:42 am Have you used that set-up before Geoff?
Yes I did, it's perfect, no problem.
Built not bought...
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Bofs
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Main scooter: Zundapp Betta 500
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Bit the bullet and got one, not too impressed with the finishing, especially the top transfer port, had to be cleaned up quite a bit as did the entry into the barrel which needed opening and squared off. The ports on the piston were rough as f**k, so tidied those up too. Anyway, the rest was fine so fitted and started running in before VWD up the road in Belfast this year. Will report back with findings.
Muffspeed....no muff too tuff
Bad Samaritans SC

1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
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