penno350 Posted October 27, 2012 Report Share Posted October 27, 2012 Had a look at a Sherpa 250 that may be for sale. It's definitely an M80 Engine and has the Homerlite Tank/Seat Unit but the present owner believes it has a special Sammy Miller frame. The frame number starts HB 150****** but definitely has tubes under the engine. Is this an early version of a Hi-Boy or was it standard? Quote Link to comment Share on other sites More sharing options...
woody Posted October 27, 2012 Report Share Posted October 27, 2012 It's a 1974/5 250 with an M80 engine fitted. The frame numbers began 150 for 250 and 151 for 325. It's the model shown on the front cover of the Haynes manual. The HB doesn't stand for Hi-Boy, it's Bultaco's own prefix and used to change from model to model, JB, RB etc. The 150 model's fibreglass tank unit was replaced in the UK with the Homerlite tank, so the tank unit on your bike is correct for that frame. I think all SM frame numbers were prefixed SM and weren't as long as standard Bultaco frame numbers. They all had a bashplate instead of frame tubes. Quote Link to comment Share on other sites More sharing options...
penno350 Posted October 27, 2012 Author Report Share Posted October 27, 2012 Cheers Woody Quote Link to comment Share on other sites More sharing options...
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