Pete_engineer Posted June 7 Report Share Posted June 7 (edited) Hi All. I've just done a deal on ebay for what I understood was a 1980 Yamaha DT125 Trials bike. After picking up the bike and a bit of investigation it turns out to be a DT175 engine in a hand made frame possibly WES Powys? There are some trick aluminium parts, air filter and exhaust expansion box and fuel tank. Marchoni forks Engine starts easily so I'm happy I've got a good deal. I'm trying to identify the frame builder. Anyone know anything about it? Any info would be useful. Thanks Peter Edited June 7 by Pete_engineer 1 Quote Link to comment Share on other sites More sharing options...
konrad Posted June 7 Report Share Posted June 7 That monoshock configuration is reminiscent of mid-1970s Yamaha MX bikes. Some interesting backstory here: https://motocrossactionmag.com/classic-motocross-iron-1974-yamaha-yz360b-monoshock/ Quote Link to comment Share on other sites More sharing options...
Fantic.156 Posted June 15 Report Share Posted June 15 What you have there is a Chapman BSA. 1 Quote Link to comment Share on other sites More sharing options...
Fantic.156 Posted June 15 Report Share Posted June 15 One of the 1st mono shock trials bikes, built by a chap called Mike Chapman. Based on a DT175, hence why you thought it was a DT Quote Link to comment Share on other sites More sharing options...
konrad Posted June 15 Report Share Posted June 15 Well that is pretty cool. I Googled "chapman bsa trials" and the first hit is here: Looks like the original builder was a member here (mick_99) and replied, "...20 production bikes and there were 3 prototype made:..." Quote Link to comment Share on other sites More sharing options...
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