t5's suck on the serval, bike was still fun to ride but the t5's have no top end at all. the shearers have more power every where than the t5's did and scream up top. on a dyno sheet ive seen, the t5 was a good 10-15hp down from the shearer and cpi. they all came on about the same rpm, the cpi had a lil more mid range but not much more and the shearers pulled more revs.
carb size will alter the response big time, shearers and stock carbs have heaps of bottom end, but lose some top. 34's and shearers have a lil less bottom but heaps on top.
i trail mine, 34's/ shearers. i think it has more than enough bottom end.
i havent ridden a serval with cpi's but i think the cpi would be a great pipe for it. is there any cpi servals around ?
just make an air box. shearer also make stinger tubes to fit with an aribox.
as said, a serval will need some porting to run sweet with the snipers.
and shit.