i just rebuilt my cr125 with new rings and gaskets i was riding today and it lost all compression. i can pop start it and it runs but really bad there is not powerband and suggestions
2003 cr125 complete compression loss
- Thread starter jrblaster15
- Start date
just sent my buddy's 94 cr125 cylinder to ken oconnor, he said he lost powerband, and it was running like sh*t, after checking all the obvious things, cleaning carb, and filter, checkin spark, ect. ect.
i checked compression, i checked it last cause i just did it 3 weeks ago, it had 165lbs of compression, now i check it again and its down to 120, in 3 weeks time ??????
so out to ken oconnor it went
we'll see what he finds
i checked compression, i checked it last cause i just did it 3 weeks ago, it had 165lbs of compression, now i check it again and its down to 120, in 3 weeks time ??????
so out to ken oconnor it went
we'll see what he finds
just throwing it out there but is the pipe loose that might affect the powerband but idk deff do what awk said but how is the cylinder and kinda a stupid question but did you mix the gass too lean cuz you might have blown your top end
i am pretty sure that i didnt blow the top end because i can pop start it but the power band donesnt work but today i am gonna check the reeds gaskets and i am gonna see if i assembled the power valve right
yea i dont think you blew it up either,i think its the head gasket or base gasket ,is it smoking real bad
well i jus took it apart the reeds look like they are in good condition they are vforce and one of thm looks to be a little lose but no cracks or chips. the powervalve was fine. everything was torced down. i was running bennys 2 stroke oil in it. the last time i rode it i didnt have enough gas so i filled topped off my tank with my friends gass he was running gp7 oil so i think that that was a bad idea i was running around 32:1 he was runing 50:1 and i had half of tank or each. i am startng to lean towards that i blew it up?
Pull the pipe off and look up in the exhaust port. You'll be able to see the piston and ring, then go from there. Sounds like she's blown
alright just ordered the wiesco top end kit so ill let you guys know how it goes when i put it in
just put a new wiesco top end kit in it and it runs great so much compression thanks for the help and how should i break it in
well if you say it runs good, sounds like you by-passed the break-in heat cycles, so just ride it now, and check the torque on them head bolts after another short ride and cool down
since my first posting on the cr 125, i sent it to ken oconnor, he found the piston/rings to be badly worn, the cylinder was a little scratched up but within specs, and the kid opted to not re-chrome it, ken got me a new piston/rings/gasket set and it got shipped back this morning, fast service, again, he thinks it'll be just fine for a while
since my first posting on the cr 125, i sent it to ken oconnor, he found the piston/rings to be badly worn, the cylinder was a little scratched up but within specs, and the kid opted to not re-chrome it, ken got me a new piston/rings/gasket set and it got shipped back this morning, fast service, again, he thinks it'll be just fine for a while
