[taylor146]

hi
had similar issues with my 2018 300, was using NEDH 3rd clip with 42p and 175 main after the reprogram. I'm in the uk using 98ron fuel and through the heat of the summer seemed fine. last time I raced the bike in cooler conditions the bike was knocking /banging with racing idle when I CLOSED the throttle after a lot of 3/4 - full throttle fast riding, if your trail riding does not seem to be a problem. did some testing and by raising the main to 178 and richening the idle screw managed to reduce the problem, maybe excessive combustion chamber / exhaust temps igniting unburnt fuel. measured the squish and its 2.10 mm at the edge of the bore so too big, I'm thinking this is maybe part of the problem. Piston shows no sign of over heating, seriously thinking of getting the bike on a dyno.