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1985 Kreidler KRC 125
1997 Müller 125
The Shop
CR500 engines have an 89mm piston std.
685 /700 Maicos / Zabels / MHs/ MEGAs by Rubig are (generally) 100mm - some over bores I've heard of up to 103.8 /104, and JBR had 108mm slugs available. And, strokes of around 86 / 87mm, though to go to the 700 + cc sizes they seem to go for longer strokes, over ever more massive pistons.
The 'gap' either side of that piston in that bore is a lot more than 5.5mm, in that picture
Full build here: https://www.vitalmx.com/forums/Moto-Related,20/2005-KX250-2-Stroke-Build,1301898
Pit Row
All the bikes either are fully restored.......original condition or NOS!!
Post a reply to: Kick a** two strokes!