Originally Posted by
diamondracing
The K9 is real thin and worthless IMO your 21bf should be thicker and hold a seal better.
ok cool i run the hobby 9 (s5), engine by the way on my truggy with a 86 pipe with a 13 t bell. its a fast engine thats for sure it starts right up il tell you that.
it has ok punch but once, i get the low end right i think i can get prety good punch.