how many hours?

[Blue Duece]

just how many hours do you put on a two cycle engine before replacing the rings..............my bike drops in PSI after about 40-50 hours....so i put in new rings.............am i high??????

[suzuki0702]

expected, ive been told anything under 105psi needs a rebuild, probably want to hone your cylinders when u replace the rings if their is enough clearance in the life of hte motor still but if it bumps compression back up go for it..but u must be high

[Blue Duece]

oh and please lets not say you loaded up on friday night and went to the dunes, and came back sunday and you burned 5 gallons of gas so you got 48 hours on your bike........to ride a 45 minute moto on stock jugs you burn 2.5 gallons of gas, the whole damm tank if your ported, and your pinned the whole time.......so lets say you held it wide open for 40 hours you went through .....so someone here goes through 130 gallons of gas and thinks its a joke to rebuild after that???????????

[thegroup]

oh and please lets not say you loaded up on friday night and went to the dunes, and came back sunday and you burned 5 gallons of gas so you got 48 hours on your bike........to ride a 45 minute moto on stock jugs you burn 2.5 gallons of gas, the whole damm tank if your ported, and your pinned the whole time.......so lets say you held it wide open for 40 hours you went through .....so someone here goes through 130 gallons of gas and thinks its a joke to rebuild after that???????????

423451[/snapback]

[locogato11283]

hmmm, i dont understand the question??

[Blue Duece]

the question is, how many hours on a two cycle engine before you put pistons and/or rings in it?...............

[bkabina]

We used to change them after about 30hrs,But on the motors I have now its way less.

[taldoc3]

whoa blue duece, I just about got a migraine reading that

[98bonerSTOCKshee]

I thought the question was is he high?

 

 

I think he is....

[ozosborne]

I suppose the best thing is to get a compression tester. What psi should it be pushing and waht is a critical loss? Also, I suppose there will be a variance between the two. What's acceptable.

[Blue Duece]

oh and please lets not say you loaded up on friday night and went to the dunes, and came back sunday and you burned 5 gallons of gas so you got 48 hours on your bike........to ride a 45 minute moto on stock jugs you burn 2.5 gallons of gas, the whole damm tank if your ported, and your pinned the whole time.......so lets say you held it wide open for 40 hours you went through .....so someone here goes through 130 gallons of gas and thinks its a joke to rebuild after that???????????

423451[/snapback]

sorry this link didnt paste with this

http://www.bansheehq.com/forums/index.php?...pic=50902&st=15

200 hours on a set of rings and because it still runs it must be tight.......

[ozosborne]

Thanks for the info. What seems logic to others is unfortunately not logic to me.

 

This place is a great source of info.

[dalegoldston]

I check compression after a rebuild. Then check agian every three/four months. When I lose 10 psi its time for another rebuild. In four months I probably only about 10-15 hours. I run castor927 @32:1 and its been 2 years since my last rebuild.

[PUSH THE THROTTLE]

As I wrote in the other post.

 

I'm with Duece on the compression tester thing, keep an eye on your compression. I rebuilt when mine was just under 120psi and I wouldn't go much lower. I'm running 180 now. I'll keep an eye on it and if I get down to 162psi which is a 10% loss it's time to open her up and take a look. Also maintain the cylinders within 10% of each other if one drops you are inducing alot of stress in the engine components to compensate. It's independent of time 40hrs, 60hrs whatever base it on your performance and compression everybody rides different your little brother would probably wear it out before your grandma. I've always figured about 50hrs but since I don't run an hour meter anymore I have no way to judge that unless I wrote it down after every ride.

 

By the way 200hrs at 6000rpm average is like 72 million revolutions of the crank that's an awful lot of times for a piston to rub on the cylinder, 72 million rubs on most things and you won't have the thing left to rub.

 

Oh to clarify that's 72 million up down rubs so actually 144 million total rubs and that doesn't factor in acceleration and deceleration and warming and cooling and temp changes and foreign matter. That's along time to not flower anything up.

[batoutofshell]

As I wrote in the other post.

 

I'm with Duece on the compression tester thing, keep an eye on your compression. I rebuilt when mine was just under 120psi and I wouldn't go much lower. I'm running 180 now. I'll keep an eye on it and if I get down to 162psi which is a 10% loss it's time to open her up and take a look. Also maintain the cylinders within 10% of each other if one drops you are inducing alot of stress in the engine components to compensate. It's independent of time 40hrs, 60hrs whatever base it on your performance and compression everybody rides different your little brother would probably wear it out before your grandma. I've always figured about 50hrs but since I don't run an hour meter anymore I have no way to judge that unless I wrote it down after every ride.

 

By the way 200hrs at 6000rpm average is like 72 million revolutions of the crank that's an awful lot of times for a piston to rub on the cylinder, 72 million rubs on most things and you won't have the thing left to rub.

 

Oh to clarify that's 72 million up down rubs so actually 144 million total rubs and that doesn't factor in acceleration and deceleration and warming and cooling and temp changes and foreign matter. That's along time to not flower anything up.

423604[/snapback]

Yea thanks for telling me now, I have to get my weiner rebuilt!