Sand in engine- yz125

yz8103
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12/9/2018 2:49pm Edited Date/Time 12/11/2018 11:09am
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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zehn
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12/9/2018 2:58pm
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
4
CarlinoJoeVideo
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12/9/2018 3:06pm
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.
2
newmann
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12/9/2018 3:45pm
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
5
pete24
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Marlborough, MA US
12/9/2018 4:00pm
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

The Shop

Spudnut
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WA US
12/9/2018 4:03pm
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
Dcope17
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Troy, IL US
12/9/2018 6:56pm
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.
1
yz8103
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12/10/2018 11:31am
Thanks for the info guys, here are some photos...
AHRMA361
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12/10/2018 11:40am
^^Oh Boy....You have some work ahead of you.
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zehn
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12/10/2018 11:40am
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
7
12/10/2018 11:42am
yz8103 wrote:
[img]https://p.vitalmx.com/photos/forums/2018/12/10/308901/s1200_30FDA72C_1A3A_4D9C_9672_D55E62016975.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/12/10/308899/s1200_8DFFAFD4_89A6_4130_AC0E_E4DD783CE9F7.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/12/10/308900/s1200_FFE3A199_E609_4E5C_B6E8_137B3F5FD32C.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/12/10/308902/s1200_3652C5A6_C088_4ED2_B97F_B2999BA4359E.jpg[/img]




Ughh, yeah complete rebuild...
2
kb228
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Mansfield, OH US
12/10/2018 11:51am
just run it
3
zehn
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12/10/2018 12:00pm
kb228 wrote:
just run it
Shit will buff out
2
gt80rider
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12/10/2018 12:09pm
After the pics, yup, a TOTAL cleaning/rebuild is in order.
2
Jrewing
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AU
12/10/2018 1:03pm Edited Date/Time 12/10/2018 1:04pm
Wow
1
yz8103
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12/10/2018 1:24pm
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
yz8103
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12/10/2018 1:25pm
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 that out reliably
Yep looking that way?
yz8103
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12/10/2018 1:26pm
AHRMA361 wrote:
^^Oh Boy....You have some work ahead of you.
Sad
Lucifa.
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Christchurch NZ
12/10/2018 1:48pm
Theres a chap in England that will clean that engine up real good along with all your dirty gear.
newmann
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12/10/2018 4:48pm Edited Date/Time 12/11/2018 6:31am
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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4
zehn
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Anchorage, AK US
12/10/2018 8:28pm
Sand on the crankshaft = excessive damage in my book.
VRR7
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ZA
12/10/2018 11:15pm
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
danman
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Readstown, WI US
12/11/2018 9:14am
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.
2
zehn
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Anchorage, AK US
12/11/2018 9:41am
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 whole bike...
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.
“Anybody who disagrees with me is an entitled pussy”
1
newmann
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US
12/11/2018 10:34am
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 whole bike...
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.
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. WinkLaughing
zehn
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12/11/2018 10:35am
I’m all about freshening up new bikes and getting more use out of them. I race AHRMA for what it’s worth.
yz8103
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121
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12/9/2018
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IE
12/11/2018 11:09am
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 whole bike...
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.
Yeah I agree , could do with a new piston anyway I guess

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