thanks dave,

it looks like a du bro mount that they stocked the kit with. could be wrong...

i was able to get a measurement on a YS140 length off the internet (about 5 inches) so that would work with a 6 inch cowl-to-firewall distance. i would probably have to use a gator RC mount however, as the du bro mount may add more physical distance than the gator RC type mount. have to get the TT rare bear kit first i suppose (an xmas present to myself i think)

hope the 91 gives you enuf pull... but you are correct in trying to minimize the weight.