Maintenance & Technical > KX250 / KX125

She's Alive !

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MadKaw:
the skirt is the part below the rings that hangs down about an inch or 2 on each side of the piston. the part thats not SUPPOSED to be in contact with the cylinder. and the pistons with only one ring I believe are a race type piston. OEM has 2

TaKeN:
Well, its a Pro-x piston in the bike now,


same as last time, although ive just read the guide on rebuilding a KX 500 engine, and i didn't file down the edges of the skirt on my piston  :cry:


The last pro-x piston in the bike cracked at the front of the piston, middle way up the skirt.


I didn't ask for a PRO-X piston :(

Mitaka would have been my choice, cheap and good from what ive read about them.

KDXGarage:
Crank and let idle until war, then shut down and let COMPLETELY cool down

repeat and putt around for 10 minutes, NEVER HARD ACCELERATION

same for 20 minutes

same for 30 minutes

TaKeN:
Thanks,

I hope i havn't already damaged the engine  :-(


I warmed the bike for 5 mins, then lot it cool down completely.


Then warmed it up again and rode if for five mins constantly gear changing.

Then warmed it up and rode it again for ten mins constantly gear changing.

Then last night i warmed it up and took it across the field for about 15 mins accelerating not too hard,


Then about 20 mins later i took the bike onto a flat bit of field and opened it up... not revving it flat out. But pulling quite hard :(

Then towards the end of the field i would pull the clutch in, then throttle forwards and backwards to lube the cylinder a bit, i went up and down the field about four times.

Then i shut off the bike and let it cool for five mins before putting it into the shed...

Is this likely to have damaged it ?

and do  you consider it to be RAN IN now ?

Thanks in advance  :-)

KDXGarage:
That sounds like it wouldn't do any damage.  The gear changing wouldn't affect the cylinder, piston and rings, though.  I think the main thing is the cool down cycles.  You have little choice but to go give it hell and see how it does.  :-)

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