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Deze reply is gepost in de afdeling Profile in het onderwerp 'Derbi-Olaf' (ID 13836).
De reply is geschreven door kenny77 (UserID 11550) op 9-9-2010 18:51.
![](http://www.siegertyamaha.com/MotorradVerk/C169.jpg)
"These are adjustable compression cylinder heads for TZ 250 A (reverse cylinder). The volume of the heads is adjustable via a movable threaded chamber that is locked off with a castle nut. These heads are exteremly rare - like hens teeth! This pair were used by privateer GP team running Niall Mackenzie in 1990 ( he only competed in a couple of GP before moving to 500's)"
Best tof. ![](img/post/s/b.gif)
kosten dan ook wel 575 pond.
ook grappig cilinder'tje
80cc
![](http://www.siegertyamaha.com/MotorradVerk/C54b.jpg)
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