mezo opening the ports up is fine dont make the inlet ports too smooth its the textured surface which helps make the fuel and air to mix better i've seen performance knocked off by over doing the port finish  the combustion chamber is normally fine just a de coke is enough to keep that clean  the exhaust ports can be as smooth as you like the headers are enough to keep the back pressure wave intact
03XT600E dont waste your money on a dyno jet kit you are better off getting a handfull of jets and a book on carburetor tuning you will get more out of doing it that way than handing it over to a so called professional who will probably **** it up quite a few times before getting it back to just a fraction better than it was before taking all your money  your hic up at 5500 rev is pretty normal for the mods you have its the secondary carb kicking in and is more than likely the main/needle jet than needs going up 1 size or the needle does need to go up a notch
__________________
XT 630 SUPERMOTO
GSXR750L  KMX200
RF900 & GSX400X Impulse Projects
3.9 V8 Rangerover
|