OS Twin plug head

[Daniel Dupont]

I have three of the 3 mintors head on my YS 140 RX, it does lower the idle 
and make them smoother, the link is http://www.mintor3m.it/Index.htm  just 
send him an e-mail.

There is actually two Japanese dual plug that I know of none from OS to my 
knowledge, the link is www.hobbynet.com  I used a translator available on 
the web (free) Bellwood is the company producing them they seem to do high 
end product out of aluminium and carbon fiber, the head number are 150142 
for the green one and the is one larger non anodized number 150141, for the 
green one there is also the option for a additional piece (call sub head 
sink)that can be bolted in the center. green 13000 yen (with sub) and the 
other one is 9800 yen......I don't have either of these two.

Daniel D.

>Mike,
>How does one purchase either of these heads?
>
>--Lance
>
>Hi all,
>
>  The green Japanese twin plug head is a bolt on option that even has 
> another heat sink piece. Didn't have too much luck with the extra piece, 
> the engine was hard to warm up and would sometimes die before take off. 
> Removing the second piece solved that. The idle was incredibly low at 
> around 1300, and transition was the smoothest of any OS I have seen yet. 
> This particular engine also used an exhaust valve on the stinger, and in 
> conjunction with the head, made for the smoothest OS I have seen to date.
>
>  it's worth noting that the green japanese head is bigger, and is hell on 
> chin cowls with hyde mounts =P
>
>  The 3M purple head from Italy is also supposedly the same bolt pattern 
> as the OS, although I haven't had any personal experience with these. If 
> it works the same as the green one from Japan, this could be a good 
> investment.
>
>  I understand the 3M Mintor engine it was made for is a real work of art, 
> and I may try to obtain one of these myself soon.
>
>  -Mike Hester
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