I recently acquired a 1980 Peugeot 102 that had been sitting for years. I’m going through the ignition system and ran into a bit of a problem. The service manual from 1969 says timing should be set at 2.5mm btdc for the piston port engines, some people say 1.5mm btdc, others say 1.8mm btdc. What’s the proper timing for a stock 102? Also, I’m looking at ditching the leaky gurtner.. which SHA would be a good match for this bike?