carb tweaking

Today my original carbs were ready to put back in. All set up with 135 mains, 1mm spacer lifting the needles and 2 turns out from pilot stop. Ive got carb swapping down to about 30mins, quite simple once one knows how to prize/lever them in. I found by popping the rubbers on the carbs, a touch of wd40 wiped on the inside of the rubbers help them slip onto the firstly the front cylinders then gently ease with a bit of wood resting on the rear cylinder head and resting on one of the rear carb tops, bit of force pulled down towards the front of the bike just gently eases them onto the rear intake ports.

The spare set are from a 1994 vfr and have the same jets and needles but slightly shorter intake funnels....would the shorter stacks give a better top end but less low and mid range?...have to read up on that or wait for the track.
I also filled the bike with some nice silkolene race oil 10/50. on starting the bike it firstly ran lumpy but at the same time clouds of blue smoke were piling out the exhaust. I couldnt work out why this was happening...until I realised when i drained the oil before the sump plug is right next to the exhaust down pipe connector, draining oil inevitably dripped onto the exhaust and into where the pipes connect and must have slipped into the sleave! so 5 minutes of running the blue clouds gradually cleared! lucky! Once the engine was clear of smoke and warmed up fully I turned the pilots in a 1/4 turn which smoothed out the lumpiness.