piston and ring wear?

[pablo]

was wondering what the averege life span is for a piston and ring on a standard c,y 23, or 26, or can just the ring be replaced if the piston is in good condition?.

 

[voo2doo]

Yes mate,you can re-ring the piston,its what most do.As for the life of it ,it all depends on how you rag/drive it. My ring lasted five years until i changed it,but i also changed the head as well.
If you look at DDM's site they have a thanksgiving sale,loads of decent gear at knock down prices.Saying that,most U.S dealers are doing deals for the American holiday.
good luck.
J.

 

[Timmahh]

really depends on maintenance, how hard you run, how lean you tune ect...


guys running on race track will tend to re ring every 5 to 10 tanks of fuel.
bashers tend to re ring when performance drops off severly. that could be in 5 tanks or 35tanks, again dependso n maintenance.

 

[slawhammer]

A good basic rule ..to for every 25 hours you run your engine...Rering the piston
this is just a rough..maintance thing...Of course guys that race on a track..wil do a
rering job sooner......But for general bashing having a good time...25 hours is about right
Not to say if sand dune running or dirt playing....could have you look at a rering job sooner...you may have ingested stuff thru the air filter...or just may be poor performance
...this is only my opinion...slawhammer

 

[Bigger the Better]

Buy a pressure tester and test from the beginning. Then you will know when it drops off.

 

[lrp gtr]

sorry to bring up and old post what kind of reading should you get when presure testing ??? whats healthy??

 

[Timmahh]

that can be tricky as well. getting the PROPER compression ratio isnt as easy as screwing on a pressure gauge and rolling it over. the hemispherical dome, will make the gauge read inaccuratly. their is a 2 stroke pressure gauge available which is made to give proper 2 stroke compression ratios.


with that said, a good corrected compression would be 14.5:1 some topends like the GP290 (36mm CY 2 bolt topend) will be higher at about 17:1, which is pretty high.

 

[voo2doo]

that can be tricky as well. getting the PROPER compression ratio isnt as easy as screwing on a pressure gauge and rolling it over. the hemispherical dome, will make the gauge read inaccuratly. their is a 2 stroke pressure gauge available which is made to give proper 2 stroke compression ratios.


with that said, a good corrected compression would be 14.5:1 some topends like the GP290 (36mm CY 2 bolt topend) will be higher at about 17:1, which is pretty high.

Good to know Tim,nice one.
J.