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Is glazing a real risk with idling engines or a myth ?

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DomP:
For how many miles should a rebuilt engine be given raod miles under load before glazing isn't a risk?

Laverdaroo:
It’s pretty similar to running in a new bike Dom, but I would give it 350-400m before picking the revs up and holding them a bit more. Rolling on and off and giving it load aids in the process rather than riding about all gingerly so the motor is being taxed but not ‘thraped’ in all the gears.
I’ve not run mine since initial set up for fear of glazing as I wait for the tank and seat etc. soon as they’re back I can get it out there but ll do 400 or so, drop the oil and do another 250m, check the oil and change if feeling frivolous. That’s just me but happy to be corrected.
End of the day I haven’t spent this much time in the shed to kill it in the running in process so probably do a little above what’s required but ‘belt and braces’ and all that.


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SteveW:

--- Quote from: Nurse Julie on September 01, 2024, 12:41:02 PM ---
--- Quote from: SteveW on September 01, 2024, 12:37:48 PM ---What about if you’ve just fitted new rings?

--- End quote ---
Depends if you've crosshatched the bores and what the piston to bore clearance is.

--- End quote ---
Bores were crosshatched and piston to bore clearance was in spec.

Nurse Julie:

--- Quote from: SteveW on September 01, 2024, 02:02:06 PM ---
--- Quote from: Nurse Julie on September 01, 2024, 12:41:02 PM ---
--- Quote from: SteveW on September 01, 2024, 12:37:48 PM ---What about if you’ve just fitted new rings?

--- End quote ---
Depends if you've crosshatched the bores and what the piston to bore clearance is.

--- End quote ---
Bores were crosshatched and piston to bore clearance was in spec.

--- End quote ---
Yes Steve, you still need to avoid too much idling as you're trying to achieve the same result as a top end that has had a rebore with new pistons / rings, bedding the rings in

DomP:

--- Quote from: SteveW on September 01, 2024, 02:02:06 PM ---
--- Quote from: Nurse Julie on September 01, 2024, 12:41:02 PM ---
--- Quote from: SteveW on September 01, 2024, 12:37:48 PM ---What about if you’ve just fitted new rings?

--- End quote ---
Depends if you've crosshatched the bores and what the piston to bore clearance is.

--- End quote ---
Bores were crosshatched and piston to bore clearance was in spec.

--- End quote ---

I must get out on it then really Roo even though its not cosmetically ready, not many dry riding days left this year!

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