I hope you get a few replies soon. Interested in this.
I have a 98 on 37k miles, same noise. Watching this one.
I have a 98 on 37k miles, same noise. Watching this one.
Just bought this bike, it's in very good nick, 100% original, about 40k miles.
I noticed when the engine is hot (afer about 15 mins of riding) it starts making a knocking sound from the top of the engine (at idle only). Also between 4-5000tpm between half and full throttle I can clearly hear the camshafts working. (like a strong growl, don't know if that's normal or not.)
I've looked all over the internet but can't really find anything that explains my situation properly, it could be the cams, pistons or even exhaust gasket leaks.
Here is a video I made of the noise:
http://www.youtube.com/watch?v=28MfVCcXb1c
Thanks in advance! :vanish
Thanks, yeah it's quite (very..) clean and runs beautiful except for that knocking noise. I don't know if the noise around 4-5000rpm is normal? It's like a fast knocking sound but it doesn't sound bad or anything. It flies tho.Very Nice Bike! Red and White! Clean looking too...
Not too sure, I had that problem with my 98s and 99... I was never able to find an explanation. Ive packed on 10K the 99 (approx 40K kms) and 3-5K on the 98, (50-55K kms)
both bikes still running fine just noisy at times.
Oil changes help. I have yet to pop the head off to check the valves tho.
just so you know there are no tappets, they use shim under buckets, and it sounds alot like piston slap on the video, but that's probably because there's more room on the tappets now.
Doesn't piston slap generally occur when the engine is cold? As when the engine heats up the pistons expand into the chamber?just so you know there are no tappets, they use shim under buckets, and it sounds alot like piston slap on the video
I can't really identify where it comes from. If I put the screwdriver on the side of the engine, it all sounds fine. The chain doesn't seem to make any excessive noise, on idle or when being revved. Putting it on top of the engine and it seems to sound fine aswell.ok good point, i missed that part, can you take a long screw driver and place one end on different parts of the engine and the other end to your ear and try and pin point an area of the bike ie top end, cylinder, bottom end, left side, right side as to where the sound is originating? you said that it was a srtong growl, could be cam chain tension?