My 99' yamaha r6 was rescued from a rather unsavoury chap 4 years ago. I had the impression that he had taken less than great care of the beast, yet was gloriously impressed with it's raw power. So I paid the money and off I flew. During the last few years I have finally learned how to do my own oil and oil filter changes, air filter cleaning and replacements and rear sprocket and chain cleaning at close to regular intervals. A year or so back I had the valve clearances adjusted, some shims replaced and the carbs synced. Although now I ponder what quality of work was carried out by these particular mechanics at Gassit Motorcycles in Fairfield, for I had a horrendous time with them earlier this year when taking the bike in to have a new front tyre, new spark plugs and fuel filter installed. Their mechanic suggested that my carbs seemed a bit 'fluffy'. So I agreed for them to resync them. They returned the bike to me with the revs hanging horribly. Three times I took the beast back. First I was told that the carbs had been checked without even removing the tank, and they were fine. Which made no sense to me, for how the hell could they get to the carbs without removing tank and airbox? Second time I took it back, they told me it had been resynced and was perfect, yet the revs were still hanging horribly. The third time was the cream of the crop. The 'mechanic' was returning from a test ride of my bike as I appeared and I spoke with the shop owner. He flew into the workshop at high speed, then wheeled the bike out by its mirrors, letting go as he kicked out the stand so it scraped along the road. He seemed irate. It took the owner to demand he remove his helmet and explain to me the problem with the hanging revs. 1. he told me that the carbs has been checked yet again and were perfectly balanced. 2. he told me that he had found the 'air screws' wrongly adjusted and asked who had last adjusted them, i told him 'YOU, two weeks ago'. 3. he told me that it could be the valve clearances and suggested they had not been adjusted for a few years, i responded 'YOU adjusted them last year'. 4. he told me that the hanging revs problem which appeared only after I had paid them to balance the carbs, only appeared because they now had the carbs balanced, and the problem was hidden before. 5. now scratching his head, he told me that it could be the carb manifold, a leak in the pipes, and only further work, which would cost me more money, could cure the problem. They left me by telling me I had 'got off lightly' as 'you know, these old bikes, could have any manner of problem'. Finally I found Pete at Everything2Wheels, who took the beast, worked on it for three hours then called me to collect. He showed me printouts of the carbs as he found them, which were very clearly horrendously out of sync. He suggested that no qualified mechanic could have synced them once recently, let alone checked them three further times. He also noted that a bolt was missing from the airbox cover and there was oil in the carbs. He showed me then the printout of the carbs in line, and it sounded so much better, and of course, the revs were no longer hanging. Now Pete's tool for syncing the carbs also gave a read-out of the engine. I cannot recall the specifics (I was too happy just to have the carbs so perfect and the bike sounding happy at idle). He may have mentioned leakage or compression, but the general gist was that the bars shooting up on his gadget as the engine roared were ideally supposed to remain green, yet for my bike, they were shooting into the red all over the place. Which was bad news. he explained that the engine was less than perfect, and the work to rectify the issue was probably worth more than the bike itself. I would appreciate anyone filling in the blanks here. What was he referring to? Perhaps the valves not closing fully? Asked if it meant the death knell of my beloved two wheeled steed, Pete explained NO, it would simply lose power over time, and he hates to give the bike back to a paying customer in less than perfect condition. What a huge difference to Gassit Motorcycles of Fairfield! Since then I have changed the battery (first time since purchase in 2010), performed the regular oil and filter change, kept the chain and rear sprocket clean. All was perfect until recently... A week back, the bike began my morning ride to work in the CBD sluggish and wretched, it seemed like a fuel blockage, the revs lurching, the engine appearing gasping for fuel. I rode it through the nastiness and within five minutes it was fine and dandy. I found the same problem on the trip home later that day. And the next day only in the morning. I thought the problem had vanished, but it returned two days later. Since then, I have made sure to use the choke when starting, let it run with half choke on idle for a minute or two, and it has been perfect. A friend I trust with his mechanical knowledge told me I should clean the 'bowls' and ideally, strip down the carbs and give them a good clean with carb cleaner. I have avoided this job as I am unsure if I can get to the carbs, let alone take them apart, clean them and put them back together! So now, I seek advice, from anyone kind enough to offer after ploughing through the word waves above. Whilst the carb problem seems gone, should I pay someone (perhaps BikeDock/Intyre which seems well thought of) to investigate? What was the issue with the engine, and syncing tool showing crazy red peaks which Pete tried to explain to me? Is this something I could get fixed? I would be fine to spend 1500-2000 to get the engine sorted, if it will breathe new life into a beast which I adore. Yet what is the problem there and how much could it cost to fix? Finally, I have been pondering for a while paying a mechanic, ideally Pete, to replace the front fork oil, which has never been changed since I bought the bike, and how long before that it was changed is unknown. Let us say, at least four years, probably closer to 6 or more. Would replacing the fork oil make a noticeable difference to the ride? Any advice would be very much appreciated. And all I can offer in return is STAY AWAY FROM GASSIT MOTORCYCLES IN FAIRFIELD! And my gratitude.