Can You Belive This !

[outtacontrol250r]

So me and my builder took apart the motor and we look at the cyl and pisotn and we read or thought we read the numbers correctly and it said it was a stock pisotn and bore which i thought was a little wierd but then i said someone replace the cylinder anyways i get a call form my machine shop and he said this piston is way to small for your cyl turned out it was bored 80 over already so he wants to take it over more thik that is safe ?? i know if i blow it up i can kiss the cylinder goodbye or get it sleeved but is it worht it ? i mean in a cooling / performance aspect ? so the piston i orderd is no good know anyone that wants a brand new 20 weisco piston kit ? hahah well this shit never ends someone reassure me that his bike is worth it hahah

[trx]

thats bored way to much thats big

in all honestly thats paper thin wall and will blow up in a short period of time



go get a 250r cylinder off of ebay with like a 10 over bore or stock bore for about 200 to 300 bucks and sometimes those cylinder come ported thats what i would do and use that piston kit u got

[atcsteve]

A sleeve is around $100 so I would just do it now, and feel safe!!

[outtacontrol250r]

Originally Posted by trx

thats bored way to much thats big

in all honestly thats paper thin wall and will blow up in a short period of time



go get a 250r cylinder off of ebay with like a 10 over bore or stock bore for about 200 to 300 bucks and sometimes those cylinder come ported thats what i would do and use that piston kit u got

how much faster can it blow up ?? im trying to call my builder now and present the idea to him and well go from there

[trx]

will it depends how u ride
fast,slow


the only thing that lubes that wall is 2-cylce oil and that piston is going up and down about 500 times a min or more depending on how u ride
and that wall gets scroching hot and the oil will boil

and those rings will make grooves if tolerances isnt 100% between skirt and rings

and over time the wall will get scars or crack and 80 over is very big
if u ride fast and do jumps and ride high gears but run a good oil and maintence after everyride it should last for about a 1 year

[trx]

and when is the last time the bottom end has been done

beouce thats alot of pressure and compression for a stock old bottom end


i went 20 over on my trx with the stock bottom end that was rebuilt like 10 years ago and it has some miles on and about a week later i blew a crank bearing

[outtacontrol250r]

i ride it like i stole it lets just put it that way ! i just need it to last thru quadfest haha then im gonna do a 310 kit but i didnt have the xtra 900 cause i just rebuilt the entire bottom end so i ws just gonna freshen up the top end 20 over but now i find out it was already 80 and they wanna take it over more

[outtacontrol250r]

Originally Posted by trx

and when is the last time the bottom end has been done

beouce thats alot of pressure and compression for a stock old bottom end


i went 20 over on my trx with the stock bottom end that was rebuilt like 10 years ago and it has some miles on and about a week later i blew a crank bearing

im having a 87 hotrods crank put in right now with all new bearings seals and ect ect

[trx]

Originally Posted by outtacontrol250r

im having a 87 hotrods crank put in right now with all new bearings seals and ect ect

alright cool


then go ahead and have ur mechanic bore it to the next size and it should last for awhile .good luck on the build

[outtacontrol250r]

thanks ! hope all goes well its been a nightmare ! hopefully it will pay off in the long run