im really starting to question my faith

[JHF219]

in wiseco pistons check this image out !! its terrifying !!

Holy shiz. Did that come out of your 250r?

[batgeek]

OUCH!

:o

im running a new wiseco right now but il have a JE in it next year

[JHF219]

no thats out of my shee !! anyone know what happened? cause i sure dont !! the left one is A OK !! nothing wrong !!

[JHF219]

for all to see

[CHAUNCY]

:eek2:

[Texan32]

you might have put the piston in backwards. That happened to my buddy. The top of the piston should have an arrow or marking of some sort. If you put the piston in backwards, the spot where the individual rings come together, it can/will hit the exhaust port and BOOM, broken rings, scared piston and cylinder wall!!!!

[JUSTINcredible]

ill try and take a pic of the piston from my blaster... you can see right through it

[Mxbubs]

?????

Originally posted by Mxbubs
????? :o

[Dirt]

Is the damage towards the exhaust or intake?

[TheX1992]

its just a flesh wound -monty python




at least yours was in one piece unlike mine....i had to go fishin for broken piston pieces in my tranny. still sucks though


my friend had that happen on his banshee....the ring caught the exhaust port and shattered.

[JHF219]

exhaust side !!

[JHF219]

Originally posted by TheX1992
its just a flesh wound -monty python




at least yours was in one piece unlike mine....i had to go fishin for broken piston pieces in my tranny. still sucks though


my friend had that happen on his banshee....the ring caught the exhaust port and shattered.


I think that is what looks like happened i think the ring broke or something !!

[nuttynewt]

Would you happen to be the guy at the District 15 HS race at Bedford (D.I.R.T.) on the Banshee that was running on one cylinder?

[knighttime]

Originally posted by JHForman250R
exhaust side !!

bananaboy, it wasnt the pistons fault in this case, dont lose your faith:confused: , but i would lose my faith in whomever put your engine together :eek2:

[JHF219]

Originally posted by nuttynewt
Would you happen to be the guy at the District 15 HS race at Bedford (D.I.R.T.) on the Banshee that was running on one cylinder?

now why would i ride my SHEE in MX when i have my pimp *** R??!!

[JHF219]

Originally posted by knighttime
bananaboy, it wasnt the pistons fault in this case, dont lose your faith:confused: , but i would lose my faith in whomever put your engine together :eek2:

i build my own engines and i have never had any problems till now !!

[redroost85]

I can understand that you are pretty ticked, but I have run Wisecos before in many rides and was pleased with them. Sorry dude!:ermm:

[F-16Guy]

250R,
I remember something in the instructions for the Wiseco piston regarding the exhaust port. You are supposed to drill a series of small, vertical holes in the piston on the exhaust side to lubricate and cool the exhaust port bridge (I don't know if the Banshee has a bridge or not). If you don't, the bridge heats up, expands, and destroys your piston. Could that be the cause? I personally prefer to run cast pistons in a two stroke, but that's just from my experiences.

[JHF219]

Originally posted by redroost85
I can understand that you are pretty ticked, but I have run Wisecos before in many rides and was pleased with them. Sorry dude!:ermm:


im not dissing on them its just that this is not the first time this has happened but the other time was my fault(circlip come out) but this time i dont know what the hell went wrong

[bongwater200]

Looks like you broke a ring. The piston could have been in backwards, the exhaust ports may not have been properly radiused, or the bore is egg-shaped allowing the ring to come too far out of the groove and snap off.

My buddys piston out of his 87 banshee looked identical to yours. i forgot what he said he did wrong when he rebuilt it but he was pretty ticked

[TheRedRebel17]

so this isnt a problem with all of wiseco pistons? I just put one in my lakota, after sinking it(my fault..stupid ice :mad: )

[spliffy]

My R just went through a wiseco piston also.... looks identical to that :mad:

Cant be sure form the info here so far but from the pics it looks like you may have possibly had too much clearence between the piston and cylinder. I have also seen that type of carnage on an overbore that removed the chamfer from the ports and after it heated up it just caught the rings and bam!

Then again it could be so many different things. You need to rethink all the back to the installation and figure all the tolerances or clearences etc an then start looking at jetting and any other obvious tales from the cylinder etc.

Fun fun fun :)