Hi guys hoping someone can give me a bit of help or advice, someone on here usually points me in the right direction and have helped me with everything so far so fingers crossed. What i'm wanting is advice on tuning deristricting at the carb. I have powervalve pinned, old cdi off a tzr race bike, currently in process of fitting either a dep or gutted standard expansion spanny, ive modified the rubber inlet manifold so am pretty much getting there however when chatting to a friend recently he mentioned a couple of things first something about modifying reed block windows what is this and what do i do???? Do i bend the actual reed petals? Or do i make the holes in the block bigger???? Secondly the yeis boost bottle that is connected to the inlet manifold when removed this has a small hole in the bottom of the stem, not sure how this works wether it is a kind of holding resevoir for excess fuel or as some kind of air vacume i dnt know however he said that years ago they would drill the hole out a bit bigger?????? I dont know cos ive not heard of either of these mods before though i am far from an expert infact the opposite however i have been messing about with dtrs for a while now and have done a bit of research and whenever ive bin stuck someone on here has helped, most other dtr deristrictions are well known an documented but not heard anything along these lines other than carbon fibre reeds and the manifold mod. Any ideas
Dans bike had a smaller one on his, probs from an lc lol, the drilling of the bottle spout would need looking into coz I think it's an exact science ???? But not hard to find out, the reed stops can be bent open by very small amounts till it runs just right at any revs but it will cost u some gaskets to get it right,as for the reed windows I woulnt do too much with those coz of the seal coating it's just time=volume ,do u know the jet sizes u have at the mo /age of bike? ,you should consider servo ? Or is it offroad
I'd always run a servo. People say it only affects bottom end but it keeps opening until well into the mid rev range so without it you will be losing power. I recently tested my bike with and without the servo and would never bother running without a servo again. I already had my own idea but it just confirmed it.
Carbon fibre reeds allow for crisper throttle response but are primarily for racing so do t fit unless your happy to keep changing every thousand miles or so.
The fibreglass ones at more durable.
I have only heard of modifying the inlet rubber causing problems and certainly not increasing power etc.
A bigger carb would help but by how much it's hard to say, especially without porting work being done on the barrel. The 32mm dellorto from the tzr 4dl is dn option but the barrels that that went on had larger ports.
probs from an lc lol, the drilling of the bottle spout would need looking into coz I think it's an exact science ???? But not hard to find out, the reed stops can be bent open by very small amounts till it runs just right at any revs but it will cost u some gaskets to get it right,as for the reed windows I woulnt do too much with those coz of the seal coating 
it's just time=volume ,do u know the jet sizes u have at the mo /age of bike? ,you should consider servo ? Or is it offroad
