hi i have rejetted to 155 mains 45 pilots tbs needle pod filters, stock exhaust drilleed i baffle loads of holes, 16 tooth sprocket bikes lowered , it goes great quick on take off and revs to 7500rpm only trouble is now i am getting 38 to 40 miles before it goes on reserve im guessing the reserve is a gallon so im getting 20 mpg ? is this normal im sure it used to do a lot more plugs are slightly dark but not soot black any answers kevin

lowered 2 in stretched front ,widened front forks, aubergine black pearl paint 40 ford rear light standard exhaust all baffels removed, pods, 155 main, 45 pilot, thruxton needle, 16 tooth sprocket procom ignitor set to no 5