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Re: Lost piston ring peg
Posted: Mon Nov 30, 2015 4:56 pm
by dennis
Think this is going off topic, yes it's good to know about ring wear but this is about ring pins coming out and what is the alternative piston if there is one, it would be nice if the makers/suppliers gave an answer.
Re: Lost piston ring peg
Posted: Mon Nov 30, 2015 5:33 pm
by Spanish Fly
No it isn’t. Excessive ring wear opens up the gap which wHere the peg sits. Consequently the ring can now tap at the peg hundreds of times a second which can loosen the peg until………..
Re: Lost piston ring peg
Posted: Mon Nov 30, 2015 5:53 pm
by dennis
ok, but still not an answer to why no one has offered an alternative, seems strange is this just a Lambretta problem don't seem to get this on 2 stroke twist and goes and we've all seen the way the youngsters screem the nuts off them.
Re: Lost piston ring peg
Posted: Wed Dec 02, 2015 11:55 pm
by Timbo
They are trialling a new piston, it's probably too early to comment...
Re: Lost piston ring peg
Posted: Thu Dec 03, 2015 12:07 am
by HxPaul
Asso pistons for me everytime,tried,tested and proven to be 100%.
Re: Lost piston ring peg
Posted: Thu Dec 03, 2015 12:34 am
by eden
HxPaul wrote:Asso pistons for me everytime,tried,tested and proven to be 100%.
they crack on the inlet skirts!
Re: Lost piston ring peg
Posted: Thu Dec 03, 2015 12:53 am
by HxPaul
eden wrote:HxPaul wrote:Asso pistons for me everytime,tried,tested and proven to be 100%.
they crack on the inlet skirts![/quote
Never had a problem
Re: Lost piston ring peg
Posted: Thu Dec 03, 2015 8:59 am
by drunkmunkey6969
HxPaul wrote:Asso pistons for me everytime,tried,tested and proven to be 100%.
They can be ok in lower power machines, but once you need a bit of power they are not ideal. I've also had a few with rings so brittle it's unbelievable.
Re: Lost piston ring peg
Posted: Thu Dec 03, 2015 9:13 am
by Adam_Winstone
I've got a number of cracked Asso pistons, in both thin ring piston port and TS1 spec. In both cases they crack from the tight corners (stress point) of the transfer window, typically at high mileages. Otherwise they are pretty good pistons.
Re: Lost piston ring peg
Posted: Thu Dec 03, 2015 10:27 am
by HxPaul
I've got two scooters with Casa kits using Asso pistons,I've had no problems from either.Should I be worried that the piston skirt on either kit will crack at sometime and wipe the engine out.I've done quite a lot of miles on both kits.This year I put a new set of rings on them and didn't notice anything wrong with the pistons...........then again I didn't look for cracking on the skirt.