November 3, 200520 yr I've noticed that in the ACU Classic trials that they are using the new Scorpa air-cooled 125s and this lead me to thinking. I noticed that the bore on the Montesa RT4 and XR250 are the same. Therefore, could I use an air-cooled RT4 with an XR250 head in the ACU classic series? The engineering isn't a problem and I haven
November 3, 200520 yr I did't know the 4rt's we're air cooled. Or are we on about something different?
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