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I've been a bit reluctant to touch that centre screw as I'm not convinced it had been touched. Don't want to create more headaches! Re torque wrench- Hmm, there's an idea, I'm not exactly sure how accurate my torque wrenches are. They were only cheapies, so it might be time to invest in...

Ok just a bit of an update... After looking at the sparkplug caps and getting them sorted, I spent some time reading up about the relationship between the CO values and throttle body synch, and found that the engine seemed happier on similar values to stock. It didn't run smoothly on 0,0 but...

I decided to retrace my steps and see if I missed anything, so I pulled the exhaust off and bolted it up again, and then moved back to the spark plug leads... Lo and behold both 1 and 3 had become loose since I last did them, so I recut them, fanned out the wire strands and screwed them down...

I've thought of trying to adjust this to see if it could be the cause of the vibes but have tried to eliminate the more common causes first. It's unlikely that it's been moved, as it's only been into the workshop twice, once for it's first service and once for the TPS recall, but it's a...

Ok, I spent a few hours working on the bike over the weekend, fired the bike up with the vacuum gauges hooked up, and tried different CO and IAC screw adjustments, and got it running pretty evenly, without any wubwub, and a steady 1260rpm idle. I spent a while trawling through posts on this...

I've been a bit busy going through lots of posts, starting with the ones you linked, and found a heap of info on the throttle synch and CO adjustment threads you've contributed to, and I'm thinking of rebuilding my old home made manometer and vacuum gauge that I used to use. I've been using the...

I remember when I first bought the bike brand new back in 2005 that it was really smooth, but over time the vibes have developed, maybe just in the last few years, but it's hard to pinpoint exactly. I think it's been a gradual thing. I have been curious about air leaks, and took out the idle...

Yeah I'm not sure why there's such a disparity between the two CO values. You'd think they'd be close, and I'm not sure how Yamaha would have tested it. Whether they rigged the engine up with a different exhaust header with O2 sensors in each of the 4 pipes and then tuned to suit CO...

I've spent time going over the bike with a torque wrench, using the service manual for torque values, and was able to do most of them apart from the swingarm, as I don't have a socket big enough for that one, so I should look into that. It idles ok and the low end is ok but the vibes start...

Yep done several TB synchs over the years, with a Morgan Carbtune and before that I had a home made manometer, and they did seem to help a bit. Even trying the synch at idle and at about 4grand on the tacho. I'll spend some time in the shed today and give everything a check over :)

The CO values did seem to help with the vibes. Standard values were like -18 and -3, it felt worse when they were 0/0 so I went back to standard. I tried higher values but still with that same offset and it seemed to help, so I'll go back and try some different combinations. There's a...

The last oil change was not long ago, I dumped the old stuff (Belray from memory) and poured in Silkolene Comp 4 15W-50, a heavier weight than the 10W40 that I normally use. The gearchange felt a bit better, but the vibes were still noticeable. I can't remember an instance where the bike...

Updates...hmmm lets see... I tried redoing the spark plug caps and zip tying them up, with new NGK Iridium plugs, gapped to 0.6mm from memory, and went over the exhaust bolts, loosened everything up, jiggled and retightened. Also I went over all the frame bolts and retorqued, but I am...

Looks like I'll give those caps another shot soon. Everything is sweet apart from those vibes, and I love how smooth the engine is down low, but I want to enjoy that top end rush without going numb! Hopefully it's not valve clearances, I've been changing the oil and filter a bit earlier than...

Hi, I've been lurking for a while and thought I'd get out of the shadows and say hello! I was a bit frustrated with the vibes and hard seat of my FZ6, and tried selling it at a bike shop in the city, but it didn't sell. So I'm thinking maybe I'm just meant to keep the bike. The engine vibes...

I just heard about this from Twitter and couldn't believe it. I loved his writing style will miss his insights and knowledge. RIP Jeremy.

Nah I have to disagree. I think it was Simoncelli's fault. You don't ride around the outside of someone and expect to cut in front... That was just a reckless move and it shows hair bear's inexperience and immaturity.

Hmmm, interesting! There were rumours years ago of Rossi going over to 4 wheeled racing, and he dabbled in a bit of rallying if memory serves correctly (although I don't follow him like a true fan would,,,,,cos I'm not! LOL) But maybe it's time for him to go to 4 wheels while he still can...

Just last night after work a car pulled in to our work, and my mate asked "Is that a Ford?" I said to him "Just look for a trail of parts falling off it, that's how you tell it's a Ford!"

+1 It's sad when champions have to resort to desperate moves, and Rossi would have known full well that move wouldn't have worked. Even in the dry he would have run very wide. Those sort of moves remind me of Schumaker vs Damon Hill, when they came to blows in Adelaide. I'm still...