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Author Topic: How should I run in my rebuilt KX500 ?  (Read 6643 times)

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Offline KXTC

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How should I run in my rebuilt KX500 ?
« on: August 21, 2009, 06:23:57 PM »
G'day,

I have recently had the g/box rebuilt in my KX500  :-D, and they also did the piston, rings, & big-end bearings. Barrel remains unchanged.

I am unsure  :| how to run it in properly after hearing varying opinions ranging from:
1) Longest: 10 hours of run-in time @ 20-50% throttle with occasional blasts and multiple oil changes
2) Shortest: run for 10 minutes then cooldown, then run for 20mins & cooldown, then 30 & cooldown. Drop / change oil and offya go.

Any help or advice would be greatly appreciated !

Cheers,
H.

« Last Edit: August 21, 2009, 06:31:41 PM by KXTC »
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2001 KX500
1999 YZ400
2007 Hayabusa

Offline dangerous dean

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Re: How should I run in my rebuilt KX500 ?
« Reply #1 on: August 21, 2009, 07:44:52 PM »
personally i would go for the latter,10 mins 1/2 to 3/4throttle cool,15mins bit more stick,cool,15mins playing then drop the oil. i dont know about the 10hrs bit...i think that person is scared of 2-strokes!
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Offline KXTC

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Re: How should I run in my rebuilt KX500 ?
« Reply #2 on: August 21, 2009, 08:21:04 PM »
Quote from: dangerous dean on August 21, 2009, 07:44:52 PM
personally i would go for the latter,10 mins 1/2 to 3/4throttle cool,15mins bit more stick,cool,15mins playing then drop the oil.

Thanks mate !

Quote from: dangerous dean on August 21, 2009, 07:44:52 PM
i dont know about the 10hrs bit...i think that person is scared of 2-strokes!

Yeah, I thought that was a little on the cautious side. :?

Thanks !
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2001 KX500
1999 YZ400
2007 Hayabusa

Offline ID KX500

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Re: How should I run in my rebuilt KX500 ?
« Reply #3 on: August 22, 2009, 03:30:18 AM »
That looks like a Wonderland for a KX500 :-D.
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Offline kaw rider

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Re: How should I run in my rebuilt KX500 ?
« Reply #4 on: August 22, 2009, 06:23:37 AM »
don't run synethic premix the first tank full.
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Offline dangerous dean

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Re: How should I run in my rebuilt KX500 ?
« Reply #5 on: August 22, 2009, 10:37:12 AM »
dont run synthetic? im sorry i have never heard of that one before?????  to be honest i wouldnt take the chance of having any of the old crappy non-synthetic oil hanging around in my engines...mainly because the 2 dont mix and you will end up seizing something, i might be totally wrong but really i have never heard of that...maybe higher beings can enlighten to why?
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Offline kaw rider

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Re: How should I run in my rebuilt KX500 ?
« Reply #6 on: August 22, 2009, 01:00:22 PM »
I had a fresh plate job not seat the rings because of it. And i have used this plater for a long time and this time i was in a rush and used synethic and had only 60 ibs compression. Had the plater look at the cylinder and install new rings on non-synethic oil on pump gas on had 210ibs compression.

I think on a used cylinder or a plated cylinder thats has some hours on it, it's not a issue.

race gas and some oils have additives that glaze over the rings.
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Offline kaw rider

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Re: How should I run in my rebuilt KX500 ?
« Reply #7 on: August 22, 2009, 01:03:41 PM »
This is what my plater recommends.

What kind of oil should I use?

For 4-Stroke engines we recommend high quality petroleum based motorcycle oil. Many of the non-synthetic OEM engine oils work well and allow the rings to seat quickly. Do not use full synthetic or semi-synthetic oils for break in they are too slippery and keep the rings from seating on the bore. For 2-Stroke engines we recommend Yamalube R mixed at 32:1, we have no confidence in wild 50:1 or 80:1 claims by oil manufacturers. Oil is cheap and piston and cranks are not.
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Offline dangerous dean

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Re: How should I run in my rebuilt KX500 ?
« Reply #8 on: August 22, 2009, 05:55:13 PM »
sorry still not convinced, why do manufacturers recommend using the same oil as they come out of the factory? i had a orange 300 and that baby only ever run on synthetic from new and as for 150psi difference in compression from non-synthetic to synthetic mmmmm was there a ring missing or the head not torqued...
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Motorrad

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Re: How should I run in my rebuilt KX500 ?
« Reply #9 on: August 22, 2009, 05:59:49 PM »
My 2002 KTM new came with petrolium based oil.... in the manual it straight out said to use petrolium base for the first oil change also.... from then on... full boat syn....   KTM engeneers know more than me... so ....
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Offline dangerous dean

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Re: How should I run in my rebuilt KX500 ?
« Reply #10 on: August 22, 2009, 08:10:46 PM »
but we are talking pre-mix not gear oil
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Motorrad

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Re: How should I run in my rebuilt KX500 ?
« Reply #11 on: August 23, 2009, 03:36:47 AM »
Quote from: dangerous dean on August 22, 2009, 08:10:46 PM
but we are talking pre-mix not gear oil


Motor is a motor... they all have rings that need to seat, all have bearings that need to wear in... big end bearings, small end bearings, crank bearings.... they all have them....  Sure they get their oil differently. but they all get oil...

Like I said KTM said "NO NO..."   
here is royal purple saying "NO NO" (2nd question down)
http://www.royalpurple.com/faqs-motor-oil.html

Enough where they make a 4C oil specifically for it
http://www.royalpurple.com/breakin-oil.html
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Offline KXTC

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Re: How should I run in my rebuilt KX500 ?
« Reply #12 on: August 23, 2009, 03:56:33 AM »
Quote from: kaw rider on August 22, 2009, 01:00:22 PM
I think on a used cylinder or a plated cylinder thats has some hours on it, it's not a issue.

I think that would apply to me. The existing chrome barrel was within spec and NOT replaced.

Time to head out...ahem, and take it easy for a bit. Thanks for the help and all - KXRiders is/are great !

 
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2001 KX500
1999 YZ400
2007 Hayabusa

Offline KXTC

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Re: How should I run in my rebuilt KX500 ?
« Reply #13 on: August 23, 2009, 04:00:35 AM »
There's gotta be an upside to being the most isolated Capital City in the world (Perth, West Australia)  :-D

Quote from: ID KX500 on August 22, 2009, 03:30:18 AM
That looks like a Wonderland for a KX500 :-D.

« Last Edit: August 25, 2009, 12:31:41 AM by KXTC »
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2001 KX500
1999 YZ400
2007 Hayabusa

Offline dangerous dean

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Re: How should I run in my rebuilt KX500 ?
« Reply #14 on: August 24, 2009, 09:19:02 PM »
sorry to have final word on this subject but
Hi Dean,

Sorry for taking so long to answer, but I wanted to check this out with the
boffins in the lab, this is their reply:

'There is very little 'running in' possible with hard nickel/silicon plated
bores; they depend on the surface finish to retain oil. So, deliberately
aiming for a high wear rate by using a cheap oil (even one that claims to be
'synthetic') to run the bores in will only remove the surface finish and
reduce oil retention. Not a good idea! The old rules for cast-iron bores do
not apply. Use Pro-2, Pro-KR2 or Comp-2 Plus from
day 1'.   JR

I hope this helps.


Silkolene HQ  so as i said before dont use non-synthetic as these boys know their onions

so as for previous comments bugger off!
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