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Re: EPIC 1985 aero 50/80 swap

Posted: Sat Apr 09, 2011 9:34 pm
by PolarIce
Sorry BC I got your pm let me see what I can get for measurements.

Re: EPIC 1985 aero 50/80 swap

Posted: Sun Apr 10, 2011 1:39 pm
by PolarIce
Here's the headpipe.

Image

Re: EPIC 1985 aero 50/80 swap

Posted: Mon Apr 11, 2011 12:37 am
by bc117
hey thanks now can you get a pic of the other end

Re: EPIC 1985 aero 50/80 swap

Posted: Thu Apr 14, 2011 11:26 pm
by bc117
so i got my motor yesterday :geekdance: now i only have a few problems i have to adress and i should be good to go
i am missing the slide and cap to the carb and one of the rings was stuck in the piston even after a day sitting in carb cleaner and an hour in the ultra sonic cleaner plus a bake in the oven at 450 degrees :crazy: , i ended up having to pry it out with a small pick breaking it into pieces so now i am on the look out for at least one standard bore ring for either an aero 80 or cr80

Bear do you know if the cr80 rings will fit in the aero piston and will +0.25 rings be made to fit, both the piston and bore are immaculate so i don't think i need a new piston or rebore

Re: EPIC 1985 aero 50/80 swap

Posted: Thu Apr 14, 2011 11:49 pm
by PolarIce
bc117 wrote:so i got my motor yesterday :geekdance: now i only have a few problems i have to adress and i should be good to go
i am missing the slide and cap to the carb and one of the rings was stuck in the piston even after a day sitting in carb cleaner and an hour in the ultra sonic cleaner plus a bake in the oven at 450 degrees :crazy: , i ended up having to pry it out with a small pick breaking it into pieces so now i am on the look out for at least one standard bore ring for either an aero 80 or cr80

Bear do you know if the cr80 rings will fit in the aero piston and will +0.25 rings be made to fit, both the piston and bore are immaculate so i don't think i need a new piston or rebore
Glad it was received in one piece but sorry to hear about the rings. :oops: My only quick check when I bought it was to see if the kickstart would move the piston.

Glad to hear the internals look good and I look forward to watching your build. Thanks again. :2thumbs:

Re: EPIC 1985 aero 50/80 swap

Posted: Thu Apr 14, 2011 11:59 pm
by Bear45-70
bc117 wrote:so i got my motor yesterday :geekdance: now i only have a few problems i have to adress and i should be good to go
i am missing the slide and cap to the carb and one of the rings was stuck in the piston even after a day sitting in carb cleaner and an hour in the ultra sonic cleaner plus a bake in the oven at 450 degrees :crazy: , i ended up having to pry it out with a small pick breaking it into pieces so now i am on the look out for at least one standard bore ring for either an aero 80 or cr80

Bear do you know if the cr80 rings will fit in the aero piston and will +0.25 rings be made to fit, both the piston and bore are immaculate so i don't think i need a new piston or rebore
My race motor pistons only had one ring. Back in the day all 2 strokes pistons had 3 rings, no the standard is 2.

Re: EPIC 1985 aero 50/80 swap

Posted: Fri Apr 15, 2011 12:11 am
by eliteguy50
Bear45-70 wrote:
bc117 wrote:so i got my motor yesterday :geekdance: now i only have a few problems i have to adress and i should be good to go
i am missing the slide and cap to the carb and one of the rings was stuck in the piston even after a day sitting in carb cleaner and an hour in the ultra sonic cleaner plus a bake in the oven at 450 degrees :crazy: , i ended up having to pry it out with a small pick breaking it into pieces so now i am on the look out for at least one standard bore ring for either an aero 80 or cr80

Bear do you know if the cr80 rings will fit in the aero piston and will +0.25 rings be made to fit, both the piston and bore are immaculate so i don't think i need a new piston or rebore
My race motor pistons only had one ring. Back in the day all 2 strokes pistons had 3 rings, no the standard is 2.
How far back is that?

Re: EPIC 1985 aero 50/80 swap

Posted: Fri Apr 15, 2011 12:30 am
by bc117
I think the whole 1- 3 ring difference is all piston company/engine maker's discretion, most 2 stroke mx motors ive seen come with 1 ring pistons, cause they only need to last a couple races
yeah my 1983 cr80 has a two ring piston, i guess i could steal the piston outa that bike but im trying to sell it sigh :roll:
heres some pics

Re: EPIC 1985 aero 50/80 swap

Posted: Fri Apr 15, 2011 1:10 am
by Bear45-70
eliteguy50 wrote:
Bear45-70 wrote:
bc117 wrote:so i got my motor yesterday :geekdance: now i only have a few problems i have to adress and i should be good to go
i am missing the slide and cap to the carb and one of the rings was stuck in the piston even after a day sitting in carb cleaner and an hour in the ultra sonic cleaner plus a bake in the oven at 450 degrees :crazy: , i ended up having to pry it out with a small pick breaking it into pieces so now i am on the look out for at least one standard bore ring for either an aero 80 or cr80

Bear do you know if the cr80 rings will fit in the aero piston and will +0.25 rings be made to fit, both the piston and bore are immaculate so i don't think i need a new piston or rebore
My race motor pistons only had one ring. Back in the day all 2 strokes pistons had 3 rings, no the standard is 2.
How far back is that?
Back in the '70s and before every thing had 3 rings. In the 80's the change over to 2 rings was completed. But even back in the 70's single ring race pistons existed.

Re: EPIC 1985 aero 50/80 swap

Posted: Sat Apr 16, 2011 3:06 am
by spree-rider
current day gopeds have only 1 ring so they can rev high.

Re: EPIC 1985 aero 50/80 swap

Posted: Sat Apr 16, 2011 12:12 pm
by Bear45-70
spree-rider wrote:current day gopeds have only 1 ring so they can rev high.
Porting, induction system and exhaust system have more to do with revving high the the number of rings. More rings just increases drag which hurts house power production.

Re: EPIC 1985 aero 50/80 swap

Posted: Sat Apr 16, 2011 12:25 pm
by eliteguy50
Bear45-70 wrote:
spree-rider wrote:current day gopeds have only 1 ring so they can rev high.
Porting, induction system and exhaust system have more to do with revving high the the number of rings. More rings just increases drag which hurts house power production.
:naughty: so that is how I increase my house power. One ring is sometimes used just for cheaper production costs.

Re: EPIC 1985 aero 50/80 swap

Posted: Sat Apr 16, 2011 12:38 pm
by Bear45-70
eliteguy50 wrote:
Bear45-70 wrote:
spree-rider wrote:current day gopeds have only 1 ring so they can rev high.
Porting, induction system and exhaust system have more to do with revving high the the number of rings. More rings just increases drag which hurts house power production.
:naughty: so that is how I increase my house power. One ring is sometimes used just for cheaper production costs.
:oops: a good spell checker does not preclude a proper and thorough proof reading. :lol:

Re: EPIC 1985 aero 50/80 swap

Posted: Sat Apr 16, 2011 12:40 pm
by eliteguy50
We all do it now and then. It was just funny to me because we lost electricity last evening.

Re: EPIC 1985 aero 50/80 swap

Posted: Tue Apr 19, 2011 12:21 am
by bc117
finally back heres my progress so far got the engine in with very little fuss, no frame modification what so ever... yet :nervous: just had to modifify the engine hanger to be wide enough by splicing both the 50's+80's together but now i have a serious ride hight issue :surprise: