Clanking noise

[legaleli]

I'm having a similar problem. I start the bike and it's fine... it warms up for about a minute and then on #1 cylinder I hear noise with the movement of the piston / valves that I describe as sounding like a flat piece of steel lying on a baking sheet bouncing around on it. This clanging or intense rhythmic rattle is far less noticeable above 3K and goes away almost completely when the bike is at temperature.

I thought it was possibly piston slop from a badly stored bike... rust or something... but my motor is coming out soon (season is over in a couple of weeks) and I'm doing a rebuild from as far down as I need up. I just hope I can do the work myself.

 

[rustybronco]

I'm having a similar problem. I start the bike and it's fine... it warms up for about a minute and then on #1 cylinder I hear noise with the movement of the piston / valves that I describe as sounding like a flat piece of steel lying on a baking sheet bouncing around on it. This clanging or intense rhythmic rattle is far less noticeable above 3K and goes away almost completely when the bike is at temperature.

I thought it was possibly piston slop from a badly stored bike... rust or something... but my motor is coming out soon (season is over in a couple of weeks) and I'm doing a rebuild from as far down as I need up. I just hope I can do the work myself.

Eli,

If you start worrying about the various noises your '850 is making, you'll worry yourself to death. the clutch baskets rattle, cams make noises, she'll sound noisier when cold than when it's warm, you might even think she'll be soon be coming apart on you. mine hasn't flown apart yet and most likely yours won't either.

my suggestion is to make sure the valves are in proper adjustment, pull a compression test and if it shows all is well, go ahead and replace the gaskets~seals from the base on up (OEM only!) as not to have it leak during riding season like mine did.

 

[legaleli]

Eli,

If you start worrying about the various noises your '850 is making, you'll worry yourself to death. the clutch baskets rattle, cams make noises, she'll sound noisier when cold than when it's warm, you might even think she'll be soon be coming apart on you. mine hasn't flown apart yet and most likely yours won't either.

my suggestion is to make sure the valves are in proper adjustment, pull a compression test and if it shows all is well, go ahead and replace the gaskets~seals from the base on up (OEM only!) as not to have it leak during riding season like mine did.

I shall follow your advice.... if it is the con rods I can probably get an idea of this when I replace the seals?