I suspect this was was what happened At sometime in the past the indicators were not working, the MOT tester had a rule that if they were fitted they must work, fair enough...so just remove them and that's OK you might think...well yes indeed, if the tester was a reasonable person that was just the case, but unfortunately some of em were 'jobsworth' types and would have gladly seen you saw off the brackets as well!!!! have a look at this you'll get the idea, and do your own research looking at images of DT175 frame http://www.ebay.co.uk/itm/Yamaha-DT175-DT-175-FULL-UNCUT-MAIN-FRAME-all-tabs-straight-EZ-REG-MN-PAPERS-/221941620909?hash=item33acc060ad:g:o8UAAOSw4UtWSHfn