piston chatter

[banshee(911)]

just a quick question.Will the chatter hurt my motor and if it will how long till?

[banshee(911)]

just a quick question.Will the chatter hurt my motor and if it will how long till?

the reason i ask is because ive herd a noise after my rebuild and i finally took it to a shop and the mechanick told me it was piston chatter to run it but with the new crank just to b on the safe side wanted a second opinion or more dont get me wrong hes an awsome mechanic but dosent hurt to double check

[Snopczynski]

Should be fine, I know a couple builders that set motors up that way.

[banshee(911)]

Should be fine, I know a couple builders that set motors up that way.

they set them up to chatter hmm thats what he said he said his was louder than mine lol well thanx for the input

[Snopczynski]

my cousins 4mill chatters.

[shanYE west]

Piston cylinder gap will vary depending on type of pistons used. Too much gap and you'll be breaking skirts.. to tight of a gap and you'll be getting cold seizing.

[banshee(911)]

Piston cylinder gap will vary depending on type of pistons used. Too much gap and you'll be breaking skirts.. to tight of a gap and you'll be getting cold seizing.

will the motor give me some kind of hint if theres to much chatter or be-4 it seizes up just dont wanna b doing like 80mph n have the thing lock up wouldnt b a fun ride

[Snopczynski]

chatter happens when the piston isn't big enough for the bore. So it wont seize at all unless you run hot or without enough fuel (oil). The noise is caused by the piston tilting in the bore and chattering.

[FireHead]

Piston "chatter" as it seems to be referred to here is not really a good thing, but it can go on for a long time before anything bad happens. It really depends on how far of the bore size is compared to the piston as well as what type of cylider sleeve you have and what type of piston you have.

 

If given the opportunity I would call bullshit on whoever machined the bore or put the engine together like that and tell them to do it over and make it right. :geek:

[banshee(911)]

Piston "chatter" as it seems to be referred to here is not really a good thing, but it can go on for a long time before anything bad happens. It really depends on how far of the bore size is compared to the piston as well as what type of cylider sleeve you have and what type of piston you have.

 

If given the opportunity I would call bullshit on whoever machined the bore or put the engine together like that and tell them to do it over and make it right. :geek:

not the builders fault or the mechanic.im running k and n filters and where the stock box mounts to the rubbers under seat well wore a hole in filters and got sand in cylinders not alott but enough to matter it didnt have the sound till i went on a good ride and got behind some friends on polaras'es they stird up a big sand cloud ne ways im @ 80 over what should i do run it till she pukes ?

[FireHead]

not the builders fault or the mechanic.im running k and n filters and where the stock box mounts to the rubbers under seat well wore a hole in filters and got sand in cylinders not alott but enough to matter it didnt have the sound till i went on a good ride and got behind some friends on polaras'es they stird up a big sand cloud ne ways im @ 80 over what should i do run it till she pukes ?

Ok, I was under the impression that this was a newly built engine. In that case, I would run it until it blows. Even if it locks up, it's not like it will immediately seize and toss you over the bars. Engines don't really do the "stick in the bicycle spokes" thing like some people seem to think. :ermm:

[banshee(911)]

Ok, I was under the impression that this was a newly built engine. In that case, I would run it until it blows. Even if it locks up, it's not like it will immediately seize and toss you over the bars. Engines don't really do the "stick in the bicycle spokes" thing like some people seem to think. :ermm:

oh youre right it is a brand new motor just put 1200 in it new crank and pistons and bore vitos 4 mill with stock length rods vitos super stock pistons then did the heat cycles and checked the torque it sounded great then took it out a couple short rides to break in then took it out a good ride next day started ticking so i tore it down like 6 or 8 times to figure it out bought new crank bearings and had them pressed on then put it back together same noise then i took it to the shop and thats when he told me it was chatter the motor dont even have 3 hours on it

[banshee(911)]

oh youre right it is a brand new motor just put 1200 in it new crank and pistons and bore vitos 4 mill with stock length rods vitos super stock pistons then did the heat cycles and checked the torque it sounded great then took it out a couple short rides to break in then took it out a good ride next day started ticking so i tore it down like 6 or 8 times to figure it out bought new crank bearings and had them pressed on then put it back together same noise then i took it to the shop and thats when he told me it was chatter the motor dont even have 3 hours on it

oh and he miked my cylinders and pistons and the cylinders are right where he put them but the pistons had a thousands and 1/2 of off them

[FireHead]

oh and he miked my cylinders and pistons and the cylinders are right where he put them but the pistons had a thousands and 1/2 of off them

1.5 thou would do it. If you still have the engines appart it might be worth putting in a new set of pistons.

[blowit]

oh and he miked my cylinders and pistons and the cylinders are right where he put them but the pistons had a thousands and 1/2 of off them

 

 

I agree with fire guy on this one. I would get s second opinion on the clearances. We have also noted more piston slap with the the short skirt pistons that Vitos sells. The shorter skirt does several good things but at the sacrifice of piston stability and durability. You need to pay special attention to the cylinder taper and out of round specs. If everything is good, ride it. I will say that some strokers just make a little more noise.

 

 

 

Brandon