I recently did a track day at Eastern Creek, and had a superb time. The bike spent most of the day between 7500 and 11000rpm. I accidentally hit the rev limiter a couple of times trying to keep up with faster bikes on the long straight. Since then I've noticed the bike has developed a vibration from 5500rpm onwards that wasn't there before, it's not road speed related, and it's not there when I pull the clutch in, so I'm pretty sure it's not chain related as it looks like new and has no tight/lose spots and is adjusted right. Could I have done some other damage?
Though I don't know for sure, but reasoning suggests to me that the rev limiter is in place to prevent damage to your engine by over reving. Yes? Hopefully you will find an easy cheap solution to the vibs
First off, I highly doubt you've done any damage to your motor. But there are things that wear and doing a track day stresses consumable parts more than tooling around the canyons. Anything that could have possibly been halfway through it's usable life could now be worn out. Do the free checks first. Check the engine mount bolts, maybe all that high rev time started loosening one. Also, just pull and check the plugs, maybe one or more is slightly fouled or may need to be re-gapped. Check the air filter, etc. It doesn't cost but some time one afternoon, and could solve your problem.
I think you might be right. Specially the plugs/coils, I was thinking the same thing after I asked the question. I'll check everything before the weekend, including giving the throttle bodies a clean and use some injector cleaner. The track day sure was fun, but you spend all day on the limit of engine/brakes, even did a stoppie coming into turn 6, lost concentration for a second and left it a bit late, the rear wheel lifted off the road and came back down in too low a gear, skipped all over the place, scared the crap out of me. I don't think I saw the engine temp go below 96*C all day, it was hot on the track and I was hitting 11000rpm in 6th at the end of the straight.
I had exactly the same after a track day (where I also bounced the rev limter - just the once though thankfully!). Checked the torque on the engine mount bolts (the one that is at the front on the right hand side was a bit loose on mine) and tightened up the footpeg bolts (and the ones that hold the rubbers in place), and that seemed to do the trick. btw - what speed does 11k in 6th give? I didn't get anywhere near....(I blame the short straights!)
The speedo was showing 245kmh, but its way off as I have a -1 front sprocket. My next purchase might be a speedo healer. Turn 1 at Eastern creek is a scary one, the superbike boys hit it at 230kmh +, I was slowing to around 160, fast enough for me.
Next time out, tape over that speedo. It's useless and not needed/wanted on a race track. Does nothing but slow you up as it's a distraction.
You say you came down in too low a gear. Downshifting at too high of a speed can over rev the engine. Rev limiter cant help you there. I don't know if that happenned but worth mentioning I guess.
