My experience has been that they are just noisy old 2 strokes. The pipes can rattle against the spigot, against the mounts if not aligned correctly. The rads/braces can vibe up against thing. Plastics can clatter. Bash plates will rattle. Everything is always way more evident on decel because:
a) the exhaust isn't making any noise to cover it up, and
b) as the revs fall it always goes through the range where the crank is least balanced. This increases the vibes, felt, heard, etc. Under throttle you tend to have a load on the piston and also move through this area faster.. Find it and hold a steady throttle and it'll buzz away through the bars and pegs more than most would enjoy.
Last edited by Jakobi; 06-20-2017 at 04:35 PM.
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