Sand in engine- yz125

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12/9/2018 2:49 PM

Hi, I have a 03 yz125 and at the weekend I was riding in sand and the bike got stuck in the sand, and got completely emerged(wet sand). After I got it pulled out and washed, I stripped it down and there was sand in the exhaust, airbox , and the motor! There seems to be a very small amount in the motor but I’m not sure how to get it out. Should I flush it out with oil a couple of times? Any advise appreciated.

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12/9/2018 2:58 PM

You might want to consider a full top and bottom rebuild. No telling if there’s some in the main bearings, wedged into the piston rings etc.

Sand can be terminal to an engine

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12/9/2018 3:06 PM

Depends how OCD you are. If it was me, I’d take the engine out, top end off and inspect if there’s sand in the bottom. I believe you can flush with diesel, but someone can confirm that.

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12/9/2018 3:45 PM

Did you run it after submerging it? Good chance no damage if you didn’t. Pull the engine out and pull the top end. Clean and flush it all and inspect first.

Then report back with photos...wink

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12/9/2018 4:00 PM

I would do the whole motor bottom and top end but back in the day ive been known to do this
remove top end
lay bike on its side, do this on both sides
use a katchup bottle filled with premix, and squirt it threw the oiling holes on each side of case that will blow the sand out of main bearings
if its a lot of sand take the power valve out and clean it
reassemble with new top end
roost away

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12/9/2018 4:03 PM

If you reeeeally don’t want to split the cases get A pump up weed sprayer and some diesel or gas to flush it out. Take the engine out with the top end off and spray it out while the engines upside down until you don’t see any sand particles coming out

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12/9/2018 6:56 PM

Split it and clean it out.
New crank bearings too, you will not get those cleaned out enough unless using an ultrasonic cleaner. But removing them and cleaning them... should just replace them.

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12/10/2018 11:31 AM

Thanks for the info guys, here are some photos...

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12/10/2018 11:33 AM

Photo
Photo
Photo
Photo
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12/10/2018 11:40 AM

^^Oh Boy....You have some work ahead of you.

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12/10/2018 11:40 AM

Woowwww...


Yeah you’re gonna need to split the cases and fully rebuild the thing IMO. There’s no way you could flush all that out reliably

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12/10/2018 11:42 AM

yz8103 wrote: Photo
Photo
Photo
Photo

Ughh, yeah complete rebuild...

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12/10/2018 11:51 AM

just run it

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12/10/2018 12:00 PM

kb228 wrote:

just run it

Shit will buff out

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12/10/2018 12:09 PM

After the pics, yup, a TOTAL cleaning/rebuild is in order.

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Die Antwoord

12/10/2018 1:03 PM
Edited Date/Time: 12/10/2018 1:04 PM

Wow

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12/10/2018 1:24 PM

Jrewing wrote:

Wow

Yep

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12/10/2018 1:24 PM

gt80rider wrote:

After the pics, yup, a TOTAL cleaning/rebuild is in order.

Yeah didn’t realize it was that bad until I stripped it down today

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12/10/2018 1:25 PM

zehn wrote:

Woowwww...


Yeah you’re gonna need to split the cases and fully rebuild the thing IMO. There’s no way you could flush all ...more

Yep looking that way?

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12/10/2018 1:26 PM

AHRMA361 wrote:

^^Oh Boy....You have some work ahead of you.

sad
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12/10/2018 1:48 PM

Theres a chap in England that will clean that engine up real good along with all your dirty gear.

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12/10/2018 4:48 PM
Edited Date/Time: 12/11/2018 6:31 AM

Still may not be any excessive “damage”, but definitely a good excuse to freshen up a gem of a steel framed bike. Split the whole bike down and freshen up all the linkage and pivots, wheel bearings, service the shock and forks and throw some fresh cables on it. Great bike, get some more years out of it!!

Edit: Look, a thumbs down....no doubt from an entitled pussy.

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12/10/2018 8:28 PM

Sand on the crankshaft = excessive damage in my book.

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12/10/2018 11:15 PM

The cheapest option would be to strip clean and rebuild - Running it without getting all the sand out will end up in a rebuild anyway which will be more costly than the 1st option. IMO

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12/11/2018 9:14 AM

Yup, split the cases, just to be sure. You don't want to be in the air and have it lock up just because you wanted to save time and money. A bad accident will cost WAY more.

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12/11/2018 9:41 AM

newmann wrote:

Still may not be any excessive “damage”, but definitely a good excuse to freshen up a gem of a steel framed bike. Split the ...more

“Anybody who disagrees with me is an entitled pussy”

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12/11/2018 10:34 AM

newmann wrote:

Still may not be any excessive “damage”, but definitely a good excuse to freshen up a gem of a steel framed bike. Split the ...more

zehn wrote:

“Anybody who disagrees with me is an entitled pussy”

Read what I wrote and tell me whoever gave it a thumbs down isn't a puss. Not to mention they must hate motocross. wink laughing

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12/11/2018 10:35 AM

I’m all about freshening up new bikes and getting more use out of them. I race AHRMA for what it’s worth.

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12/11/2018 11:09 AM

newmann wrote:

Still may not be any excessive “damage”, but definitely a good excuse to freshen up a gem of a steel framed bike. Split the ...more

Yeah I agree , could do with a new piston anyway I guess

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