Hi there! I recently purchased a 1999 busa (16,000 miles). The bike had only done approx 1200 miles in the last 6 years or so being left standing with a little fuel in it. This led to some rust forming in the tank. I had my local suzuki dealer clean out the fuel pump and change oil, oil and air filters etc. We cleaned out the tank as best we could and I had the tps adjusted slightly to improve running under 3000 rpm. I rode the bike to France for a week. It ran OK but was still intermittently rough below 3000 rpm.
On return from France, back to dealer and replaced fuel tank with one purchased on ebay. Mechanic stripped down and cleaned out fuel pump again, replaced the paper filter along with the tea bag like one. Also replaced one of the fuel hoses with preformed one. When bike was started up again it was a few seconds before it ran on all 4 cylinders then seemed fine.
I collected the bike today from the mechanic & rode after filling up with some shell v power and it ran great for about 20 miles or so then dropped down to 2 or 3 cylinders with the other(s) cutting in and out. If I shut throttle of cylinder would appear to almost kick in but soon as open throttle would start missing big time. I rode home about 10 miles with it like this.
Beginning to lose faith in it now so any advice would be greatly appreciated.
Cheers
Jake
On return from France, back to dealer and replaced fuel tank with one purchased on ebay. Mechanic stripped down and cleaned out fuel pump again, replaced the paper filter along with the tea bag like one. Also replaced one of the fuel hoses with preformed one. When bike was started up again it was a few seconds before it ran on all 4 cylinders then seemed fine.
I collected the bike today from the mechanic & rode after filling up with some shell v power and it ran great for about 20 miles or so then dropped down to 2 or 3 cylinders with the other(s) cutting in and out. If I shut throttle of cylinder would appear to almost kick in but soon as open throttle would start missing big time. I rode home about 10 miles with it like this.
Beginning to lose faith in it now so any advice would be greatly appreciated.
Cheers
Jake