June 12, 201214 yr Has anyone removed the two tubes from under the engine which get battered out of shape and replaced them with a alloy sump shield similar to the later model Bultaco's. Is it a viable conversion or are there pitfalls?
June 12, 201214 yr As long as you measure everything up properly so you know where to make the cuts, yes it's a viable conversion. Pitfalls are cutting in the wrong place.... You have to get the angle just right on the front downtube to mount the D shaped bracket and make sure there is enough clearance under the engine. That's probably the trickiest part. The rear is easy enough.
June 12, 201214 yr Hi, have done a few of these myself, the frame will spring once the bottom tubes are cut, so it is important to put the engine back in the frame when fitting the bashplate so the frame is back to the correct dimensions as this is done. Also on the latter factory 199a/b the oil drain plug is on the side of the engine not underneath, so the plate can be mounted closer to the motor, you will have to allow clearance for the protruding plug so that is does not poke through the plate, where it can be damaged. I have seen original miller sherpas with the drain plug welded flush with the bottom of the motor to allow greater clearance, hope this helps Cheers Greg
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