OK! Now I understand! You were showing that the hole was bigger on one side of the piston compare to the other side. Ok then, THAT could cause damage to the motor for sure.
Sorry about that but anyway, I've called a Wiseco piston for my KX250F and would forever use Wiseco piston. And nope, my name don't mean I'm working there or anything relate to them. I'm a consumer that have always been well served with their pistons.
No measurements were taken, when I called wiseco they never asked me to take measurements, their is no need to take measurements when the wrist pin easily glides through one hole then locks up when it enters the other hole you dont need to measure it to see the line bore of the wrist pin hole is WRONG, BAD.
Wiseco confirmed my findings, they sent me another piston and that piston the wrist pin would glide through the hole normally.
The video is a learning tool ...... more in my next reply
The video is a learning tool, it was ment to educate others, the wrist pin should easily slide through both wrist pin bores with no resistance if it does not their is a problem, most DIY shade tree mechanics would not think twice about this and just force the pin in.
Bottom line is its your engine do with it what you want, use any parts that you want I just tried to help guys trying to learn about engine parts and what to look for when assembling new parts.
Your video don't proove ANYTHING. If you were shaking the piston with the pin in it and a ping ping song would come out of this, yes that would be wrong! But what I saw, it have nothing to show that thee piston-pin tolerance were out. And you don't gave us any measure!
Let me ask you a question : how many motor have you rebuilt in your life? If your answer is more than 25, remove all I've said.
It proves everything, Wiseco CONFIRMED I was RIGHT and they were WRONG they sent me another NEW piston as PROOF I know exactly what I am saying and exactly what I am doing.
I suggest you disregard what you have seen here and just force your wrist pin into your engine caveman style, the brighter bulbs in the bunch will learn from watching the video.
"Funny" that wiseco didnt ask for any measurements they were happy with my verbal description.
All I can say is I found what you see in the video the wrist pin would NOT glide into the piston as they normally do, I called wiseco and talked to them they said to send the piston back, they then agreed their was a problem with the wrist pin bore so sent me another piston.
Ask all the questions you want but nothing else matters here.
I don't understand what you're trying to proove here... Even if it's loose, if the difference between the pin and the bore of the piston is not better than let say0.0015, you can install them without any doubt.
I've just removed the stock piston from my KX205F 2005 and the pin is also loose and the bike were running great, only the 1st ring was due.
So if your trying to proove that these loose pin would ruin your motor or Wiseco piston are not good, you're out of the track by far dude.
Not trying to prove anything trying to teach people something, the piston in the video was sent back to Wiseco, they sent another (different) piston back, the piston they sent back the pin would slide right through as its suppose to.
The piston was a DEFECT
Wiseco has made even more changes in the past 2 years if you haven't noticed they no longer fully machine their pistons so they weigh a lot more than OEM pistons, they also raised the price 60%
Your a very observant person, I only use after market parts when I am forced to.
I like to buy my pistons from someone who makes MILLIONS of piston not form some hack that only makes THOUSANDS of pistons.
That being said now if you want a high compression or big bore piston your stuck with the crappy wiseco, since your running them you then have to brag them up :-) its human nature. being on the side line like myself I see the big picture.
what are these pistons out of... and the wrist pin should be loose because it expands when the engine is running... grab the piston when it comes straight out of the engine the wrist pin will not budge... also these things called circlips hold that in to prevent it from falling out
Maybe the piston would not sieze in the wrist pin area with a looser fit. Not saying that the pin fit is not perfect, but maybe it wouldnt hurt anything. They would send you another piston because it made you happy.
umm what was wrong with the wiseco one before u started beating on it? and can u just replate used pistons cause mine is fine atm but its been over 9 hours..
99% of after market parts are about 1/3 the quality of OEM parts, its only hype from people that have no idea what they are looking at and clever marketing by MFG's and magazines (whores) that keep these people in business.
If you want a high quality piston then buy OEM now that wiseco has raised their prices the OEM pistons are usually cheaper.
If you have to have a "forged" piston look at Worsner they are suppose to be higher quality, never used one so...
isnt it maybe oem pistons are cast and wiseco are forged,? and holes get smaller with increasing temperature, likewise there is more pison/cylinder clearance needed for forged pistons.
Pistons and "wrist" pins, and all other machined components have a tolerance+/- so they should work together. That is why blue printing works so well, it sets the engine tolerances as the manufacturer designed it...........it doesnt matter if they stick or fall out of the piston as it is the clearance between the wrist pin and the conrod that matters.........
You dont get it, it has nothing to do with tolerance the LINE BORE was WRONG. I sent the piston back to WISECO they sent me another piston.
Never understand why people defend things that are clearly WRONG, or BAD!
""What is a "pison" "
That is a spelling error, its an ERROR like wiseco made with their piston not sure why you can see the spelling error but cant understand the piston error its pretty basic.
I was under the impression Wiseco products were one of the best, in the near future I want to rebuild my 2 stroke engine, What crank, Con Rod, piston etc do I use? Can anyone advise me which products are the best please???
Before the piston is fitted, there are several clearance checks to be made. The first of these is the fit of the piston pin. It should be an easy slide fit, slipping through the piston under its own weight. A tight pin is to be avoided as this will overload the sides of the piston when the engine is running. At high engine speeds the crankshaft tends to whip and, if the pin is tight, this load will be transferred to the side of the piston, possibly distorting it and causing seizure.
A tight pin may also change the expansion characteristics of the piston and cause scuffing or seizure on the piston thrust faces. When the piston is unable to expand correctly along the pin axis it will expand at 90° to the pin and force the thrust faces of the piston hard against the cylinder wall.
I used two different color markers to mark the pistons and a different mark on each side, I inserted the pin into each side of the bore with the piston held horizontally then turned it vertical and let gravity do its work, you can see in the video this worked on 3 of the 4 bores the last one I can not even shake it out because its so tight in the bore.
Some people thing this is insignificant how ever if the piston pin bore is not correct or lined up it will make the piston pin walk to one side while the engine is running, this will put abnormal pressure and wear on the C clip that retains the wrist pin, if run long enough it will push the C clip out and the pin will snag on your cylinder, this usually does not happen soon as you start your engine,
OK! Now I understand! You were showing that the hole was bigger on one side of the piston compare to the other side. Ok then, THAT could cause damage to the motor for sure.
Sorry about that but anyway, I've called a Wiseco piston for my KX250F and would forever use Wiseco piston. And nope, my name don't mean I'm working there or anything relate to them. I'm a consumer that have always been well served with their pistons.
Cheers!
Wiseco0 1 year ago
so what was your measurements?
Wiseco0 1 year ago
No measurements were taken, when I called wiseco they never asked me to take measurements, their is no need to take measurements when the wrist pin easily glides through one hole then locks up when it enters the other hole you dont need to measure it to see the line bore of the wrist pin hole is WRONG, BAD.
Wiseco confirmed my findings, they sent me another piston and that piston the wrist pin would glide through the hole normally.
The video is a learning tool ...... more in my next reply
PilotOdyssey 1 year ago
@PilotOdyssey You say the video is to educate others and you spell "there" wrong in a lot of your comments, you should educate yourself.
pathman2 1 year ago
The video is a learning tool, it was ment to educate others, the wrist pin should easily slide through both wrist pin bores with no resistance if it does not their is a problem, most DIY shade tree mechanics would not think twice about this and just force the pin in.
Bottom line is its your engine do with it what you want, use any parts that you want I just tried to help guys trying to learn about engine parts and what to look for when assembling new parts.
PilotOdyssey 1 year ago
Your video don't proove ANYTHING. If you were shaking the piston with the pin in it and a ping ping song would come out of this, yes that would be wrong! But what I saw, it have nothing to show that thee piston-pin tolerance were out. And you don't gave us any measure!
Let me ask you a question : how many motor have you rebuilt in your life? If your answer is more than 25, remove all I've said.
Wiseco0 1 year ago
It proves everything, Wiseco CONFIRMED I was RIGHT and they were WRONG they sent me another NEW piston as PROOF I know exactly what I am saying and exactly what I am doing.
I suggest you disregard what you have seen here and just force your wrist pin into your engine caveman style, the brighter bulbs in the bunch will learn from watching the video.
"Funny" that wiseco didnt ask for any measurements they were happy with my verbal description.
Cheers!
PilotOdyssey 1 year ago
All I can say is I found what you see in the video the wrist pin would NOT glide into the piston as they normally do, I called wiseco and talked to them they said to send the piston back, they then agreed their was a problem with the wrist pin bore so sent me another piston.
Ask all the questions you want but nothing else matters here.
PilotOdyssey 1 year ago
I don't understand what you're trying to proove here... Even if it's loose, if the difference between the pin and the bore of the piston is not better than let say0.0015, you can install them without any doubt.
I've just removed the stock piston from my KX205F 2005 and the pin is also loose and the bike were running great, only the 1st ring was due.
So if your trying to proove that these loose pin would ruin your motor or Wiseco piston are not good, you're out of the track by far dude.
Wiseco0 1 year ago
Not trying to prove anything trying to teach people something, the piston in the video was sent back to Wiseco, they sent another (different) piston back, the piston they sent back the pin would slide right through as its suppose to.
The piston was a DEFECT
Wiseco has made even more changes in the past 2 years if you haven't noticed they no longer fully machine their pistons so they weigh a lot more than OEM pistons, they also raised the price 60%
Cheers!
PilotOdyssey 1 year ago
ive had nothing but good luck with wiseco pistons
MrLj410 2 years ago
You dont need luck with OEM pistons, you need luck and more with wiseco!
PilotOdyssey 1 year ago
you dont know how well your stock bike is made until you buy aftermarket products.
gilessmokey 2 years ago 2
Your a very observant person, I only use after market parts when I am forced to.
I like to buy my pistons from someone who makes MILLIONS of piston not form some hack that only makes THOUSANDS of pistons.
That being said now if you want a high compression or big bore piston your stuck with the crappy wiseco, since your running them you then have to brag them up :-) its human nature. being on the side line like myself I see the big picture.
PilotOdyssey 1 year ago
what are these pistons out of... and the wrist pin should be loose because it expands when the engine is running... grab the piston when it comes straight out of the engine the wrist pin will not budge... also these things called circlips hold that in to prevent it from falling out
Inv4derxXx 2 years ago
Maybe the piston would not sieze in the wrist pin area with a looser fit. Not saying that the pin fit is not perfect, but maybe it wouldnt hurt anything. They would send you another piston because it made you happy.
666smokeskull 2 years ago
umm what was wrong with the wiseco one before u started beating on it? and can u just replate used pistons cause mine is fine atm but its been over 9 hours..
deathstrummer94 2 years ago
man, i thought weisco was suppost to be high quality : /
CRACKERonRM2FIDDY 2 years ago
What would ever give you that idea?
99% of after market parts are about 1/3 the quality of OEM parts, its only hype from people that have no idea what they are looking at and clever marketing by MFG's and magazines (whores) that keep these people in business.
If you want a high quality piston then buy OEM now that wiseco has raised their prices the OEM pistons are usually cheaper.
If you have to have a "forged" piston look at Worsner they are suppose to be higher quality, never used one so...
PilotOdyssey 2 years ago
oh i see now
CRACKERonRM2FIDDY 2 years ago
Cool
Its easy to get confused whats trying to be said because of the format they use here :-)
PilotOdyssey 2 years ago
you need circlips that come with the piston to keep the wrist pins in
CRACKERonRM2FIDDY 2 years ago
HUH
Keeping the pin in was not the problem, getting the wrist pin to properly go into BOTH wrist pin bores was the problem.
The piston was sent back to wiseco, they sent a replacement that worked properly.
Watch all my wiseco videos.
PilotOdyssey 2 years ago
isnt it maybe oem pistons are cast and wiseco are forged,? and holes get smaller with increasing temperature, likewise there is more pison/cylinder clearance needed for forged pistons.
blackjackalofremorse 3 years ago
These are brand new pistons right out of the box, they have machining errors.
PilotOdyssey 3 years ago
Pistons and "wrist" pins, and all other machined components have a tolerance+/- so they should work together. That is why blue printing works so well, it sets the engine tolerances as the manufacturer designed it...........it doesnt matter if they stick or fall out of the piston as it is the clearance between the wrist pin and the conrod that matters.........
pathman2 2 years ago
You dont get it, it has nothing to do with tolerance the LINE BORE was WRONG. I sent the piston back to WISECO they sent me another piston.
Never understand why people defend things that are clearly WRONG, or BAD!
""What is a "pison" "
That is a spelling error, its an ERROR like wiseco made with their piston not sure why you can see the spelling error but cant understand the piston error its pretty basic.
PilotOdyssey 2 years ago
@pathman2
It was a alignment issue not a clearance issue, the line bore of the wrist pin holes was wrong.
.
PilotOdyssey 1 year ago
What is a "pison"
pathman2 2 years ago
....temperature
ssshakurrr 3 years ago
Not good . Are they Chinese like there crankshafts?
maicomasher 3 years ago
I didnt know their cranks were made in china, still says made in USA on the box for the piston.
PilotOdyssey 3 years ago
I was under the impression Wiseco products were one of the best, in the near future I want to rebuild my 2 stroke engine, What crank, Con Rod, piston etc do I use? Can anyone advise me which products are the best please???
Rush2Head 3 years ago
What application you talking here?
I would use all OEM parts even if they cost 2x more than the after market stuff.
PilotOdyssey 3 years ago
Yep i agree with u mate,genuine is the only way 2
herse88 2 years ago
i was just about to buy a set of these. not sure about it now.
Raciti1337 3 years ago
something called ciriclips!!!
slavikv19 4 years ago
HUH?
I see you dont understand.....circlips have nothing to do with what I am saying here, neither to rings, gas, oil, price of apples etc.
PilotOdyssey 4 years ago
Before the piston is fitted, there are several clearance checks to be made. The first of these is the fit of the piston pin. It should be an easy slide fit, slipping through the piston under its own weight. A tight pin is to be avoided as this will overload the sides of the piston when the engine is running. At high engine speeds the crankshaft tends to whip and, if the pin is tight, this load will be transferred to the side of the piston, possibly distorting it and causing seizure.
PilotOdyssey 4 years ago
This has been flagged as spam show
A tight pin may also change the expansion characteristics of the piston and cause scuffing or seizure on the piston thrust faces. When the piston is unable to expand correctly along the pin axis it will expand at 90° to the pin and force the thrust faces of the piston hard against the cylinder wall.
PilotOdyssey 4 years ago
I used two different color markers to mark the pistons and a different mark on each side, I inserted the pin into each side of the bore with the piston held horizontally then turned it vertical and let gravity do its work, you can see in the video this worked on 3 of the 4 bores the last one I can not even shake it out because its so tight in the bore.
PilotOdyssey 4 years ago
Some people thing this is insignificant how ever if the piston pin bore is not correct or lined up it will make the piston pin walk to one side while the engine is running, this will put abnormal pressure and wear on the C clip that retains the wrist pin, if run long enough it will push the C clip out and the pin will snag on your cylinder, this usually does not happen soon as you start your engine,
PilotOdyssey 4 years ago