bmk
'L' Plates
"How mate,...........is that a rep?"
Posts: 30
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Post by bmk on Jul 17, 2007 15:51:13 GMT
Hello.
The engine has ran for around 15 hours now, how much longer have i got before i have to change the piston ring?
When i come to replace it will a polini ring fit the rep piston?
Cheers,
Ken.
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bmk
'L' Plates
"How mate,...........is that a rep?"
Posts: 30
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Post by bmk on Jul 19, 2007 15:58:54 GMT
Anyone?  |
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Post by tony811976 on Jul 19, 2007 17:07:16 GMT
sorry mate dont know where everyone is. the only way i can see without taking it apart unless there is a recommended time in running hours is to do a some kind of compression leak test. there must be a figure in psi somewhere on a new engine for you to compare with yours my thoughts on it would be unless you start to experience serious power loss leave it. "if it aint broke dont fix it. i recently came across this oil additive for work engines whick coats the bores and lasts up to many thousands of miles. it also can be placed through the plug hole in a two stroke to inprove compression loss. they recomend using a little before each race. i used it in my escort t.d and it stopped it smoking and improved cold starting through repairing worn cylinders cgi.ebay.co.uk/Commercial-Vehicle-Show-and-AMETECH-ENGINE-RESTORE-OIL_W0QQitemZ150100788249QQihZ005QQcategoryZ10408QQrdZ1QQcmdZViewItem |
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bmk
'L' Plates
"How mate,...........is that a rep?"
Posts: 30
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Post by bmk on Jul 20, 2007 15:42:57 GMT
Cheers Tony.
Very interesting product but i would be very wary of putting it into such a high revving motor without a lot of two stroke endorsements.
I've read the endorsements in the listing and they are mostly low revving four stroke motors.
Thanks for your efforts though.
As it happens i've bought a new piston ring anyway, but i too believe in the "if it aint broke" addage.
Just can't stop tinkering though ;D ;D ;D
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Post by tony811976 on Jul 27, 2007 17:42:50 GMT
maybe this will help Blow-by This piston didn't fail in operation but it does show the most common problem, blow-by. The rings were worn past the maximum ring end gap spec, allowing combustion pressure to seep past the rings and down the piston skirt causing a distinct carbon pattern. Its possible that the cylinder walls cross-hatched honing pattern is partly to blame. If the cylinder walls are glazed or worn too far, even new rings won't seal properly to prevent a blow-by problem.  |
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bmk
'L' Plates
"How mate,...........is that a rep?"
Posts: 30
|
Post by bmk on Jul 28, 2007 13:19:59 GMT
Hello Tony, thanks for the info.
Checked the condition of the piston/ring/barrel and everything was fine.
Very slight brown colouring below the ring and a slight carbon build up on the piston top, nowhere near as bad as the one in your picture.
The new ring i bought still hasn't arrived yet so i've rebuilt the engine with the old ring as i need the bike on Monday. ;D ;D ;D
( Will be at Warden Law 4 til 9.)
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