JL OW31 reproduction top end

[JR]

JL Exhausts sells an OW31 TZ350 reproduction top end. Does anyone know anything about this product or have experience with it?

[teazer]

Nope.  They look like a 3G3  350G model cylinder with reed boxes.  350 cylinders and heads are slightly wider that 750 parts, so you can't use a TZ350 head on a 750 cylinder and vice versa.  They have to be matched. I would suggest that they used the 350 design dimensions rather than 750 because there would potentially be a greater demand in Europe for that. As for port dimensions, I have no idea what they used, 3G3, TZ750D or something else.

Fondseca used to sell a similar part but again I have no data on ports or head dimensions.

[JR]

Thanks for your reply Teazer! I was wondering if that OW31 top end would bolt on to an R5 bottom end? Joe