Maiden Voyage, have noise when hot...

I just drove my 650 for the first time last night. Thing when very well for first run. The engine ran beautifully, only a very small leak on the valve cover to contend with. But I have a clicking noise when the engine warms up. After about 10 minutes of driving I can hear a ticking noise at idle and after a little more time I can hear it all the time. The engine runs great, I got on it once (I just had to ) and lifted the front wheel.... YEEEESSSS :evil:


Anyway I have a 700cc Wiseco kit and a dyna ignition. So my initial thoughts are my timing could be a tad too advanced and I am hearing pinging. OR my timing chain is getting slack when warm, or I messed up a valve shim and have too much play in one.

What do you all think, what could be a problem when warm? It sounds great when I first start it. I only drove it down the street and back maybe a mile and a half total.

clicking or ticking sound such as an exhaust leak at the head ports?

Timing chain adjusted properly?

Its a metallic sound, I don't think it is an exhaust leak. Valves wouldn't make more noise when hot would they? I would think they would quiet down if anything.

Tyler wrote:

Its a metallic sound, I don't think it is an exhaust leak. Valves wouldn't make more noise when hot would they? I would think they would quiet down if anything.

Maybe a tight valve.

I would check valve clearance.

Tyler wrote:

Its a metallic sound, I don't think it is an exhaust leak. Valves wouldn't make more noise when hot would they? I would think they would quiet down if anything.

It's possible a loose one would be quieter with colder (thicker) oil.

Sound defined as Clacking sound if valve clearances off...

I guess it depends on the ear. Loose valves sound like a click to me, clacking is usually a loose chain hitting something.

Exhaust leaks at the header sound like a "crack-crack-crack" sound that gets louder as you open the throttle.

Tyler wrote:

Its a metallic sound, I don't think it is an exhaust leak. Valves wouldn't make more noise when hot would they? I would think they would quiet down if anything.

Oil is thicker when cold, and providing more "padding" on cam lobes.

Am thinking more noise upon reaching normal operating temp where oil is thinner.

With hydraulic valve lifters (not KZ), cold clicking is sometimes heard until the oil warms and thins to fill the lifter chambers.

Good Luck!

Just out of curiosity, do you know if you have an APE top idler assembly in the head?

Don't get me wrong here, top quality but they do make a little more noise then the OEM idler assembly which threw me off as well on my build...

Not so much as clicking, clacking, slapping or what ever sound we're all going to debate over.... Just a little more noisier...

OMR

bountyhunter wrote:

I guess it depends on the ear. Loose valves sound like a click to me, clacking is usually a loose chain hitting something.

Exhaust leaks at the header sound like a "crack-crack-crack" sound that gets louder as you open the throttle.

+1 Could'nt have said it better

Yeah I have APE parts all through my timming system, tensioner and all the idlers except the plastic one in the bottom. I removed the stock sprocket from my top ideler and replaced it with an APE part. I am going to look into this today, I'll let everyone know what I find out. I don't think its a tight valve, the engine runs perfectly. I did use the stock cam tensioner and that could be the culprit too. I just need to get to work on it. Yeah more fun with tools....