Has anyone tried doing it? Also interesting stalkers with pipe.

A lot of people use a  G51 Super Tiger  piped, so I see no reason a  GS  series would not work

Randy

Pretty Sure the rods are pretty much all the same , 16.000 rpm R/C thingos .

Have the timing figures written down , will put them here in a day or two .

The 40 has the biggest variation transfer to exhaust . the 45 ABC looks good ( non Piped )
yet to nail it in the test bed . and the softer chinese 40 ring broke in a laps , or twist .

Como 40 & 51 have the same bolt pattern , but ' shorter nose ' , shave the lugs narrower & stack to clear mounting bolts / screwdriver .
Ive got the ringed baffled Comos , later Schneurle seem where ST development proceeded thru ' S ' to ' G ' ( & GS )

Sort of the Lineiage , thru from the olde 60s g 40/46/51 of the 60s , most internal dimensions carried thru .

I put the book where i could find it easily ; in the draw .

got
   GS 45 It.        40 china       G 51 It.( C.L. )
Ex 73 ( 146 )     74 ( 148 )    68 ( 136 .

Tr. 60 ( 120 )     56 ( 112 )    58 ( 116 )

Bt.    58 ( 116 )   56 ( 112 )     58 ( 112 ) 

io 44 ic  47          44 - 46          47 - 47

so crank timings pretty much the same , sleeve set ups not .

Dunno how the Blow Down relates to the stunt pipe use ,

The 40 has the most , the G 51 R/C would have more than the C/L ! maybe better than C/L , when both piped ? .

The OS 40 / 46 VFs run about 140 Ex 120 Trans , as incidently My Silver Head ( Early ) X 45 Chrome/ ringed sucker .
The X 45 has long nose 21/46 bolt pattern NOT G Series mount .
Other X 45s have a bit , and much on flat head , higher sleeve timing .

The Como & G have same mount tho Comos shorter nose , theres two series Como post baffled ring ,
some 40 baffle are ABC , stamped on lug. Schnurle are truncated block / Flat Head .

You had me thinking of ' G ' crank swaps for timing / displacement changes . Shorter Stroke lowering port timing & V.c.V.