27-05-17, 11:51 PM
If I was you I'd start by trying to figure out if it's a problem with one cylinder or all of them. I'd run the bike in the rev range where it's losing power and then throw some water on the headers and check to see if one of them dries slower than the others. If one does dry slower it'd point to that cylinder having the problem and you could try swapping parts from that weaker cylinder onto a good cylinder. Do it one part at a time. Plug caps and coils are common culprits. If you throw water on the headers and they all dry at the same rate then you know it's a problem with a part that effects all cylinders so fuel supply, tank, fuel filter, pump, carbs, air filter, tps, maybe reg/rec. What did the plugs look like when you took them out?