hi there guys, is it a good idea to make a silencer for a 1999 kx125 shorter than an fmf shorty, my friend has an 1999 yz 125 and he made a silencer just above half the size of an fmf shorty, it actually went suprisingly well, it was loud but you could feel a difference to the bottom and lower mid range punch, he rode 28 hours on the engine with that pipe on and it didnt suffer a bit, no detonation, the piston crown looked exactly the same as all his other worn pistons, his bike is completely stock except for his home made shorty, maybe it was just his luck that nothing went wrong, if something did go wrong what would go, i would like to here your guys opinions on this and maybe from eric and rich if they have time.............................. and could someone please explain properly what bleed down characteristics of a pipe means. CHEERS