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Author Topic: Newbie few minor problems on new YZ 250 '04.  (Read 2806 times)

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Offline falk_ben

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Newbie few minor problems on new YZ 250 '04.
« on: October 29, 2012, 02:46:54 AM »
Hi Guys,

New to 2 strokes so I thought I'd join for a bit of guidance!

Just bought a YZ 250 '04 plate. Loved my mates CR 250 '07 so the 2 Stroke bug clawed back childhood memories(twos up hitting powerband through fields on older teens bikes wearing t-shirts but no helmet). Owned a CRF 450 R for 18 months before my YZ but I don't miss it!

Just checked over my latest shipment to the Falkland Islands and it's not a bad bike but requires abit of attension!

Starts and runs OK, quite surprised at the gearing being 14/46( a little tall). It's got a lot more go than my CRF!

My concerns are low water in rads, trans oil milky grey, and the shraider valve has snapped off my shock! I guess my water pump seal has failed? Can I get the valve? looks like they are replaceable. Does it get filled with air or nitrogen?

I wonder if my suspension is standard too? There are stickers with Pro Action 3 stage incremental! Does this mean they have been re-valved?

Great stuff on here

Ben. :)
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline factoryX

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Newbie few minor problems on new YZ 250 ''04.
« Reply #1 on: October 29, 2012, 11:38:46 AM »
Sounds like the seal failed, the valve can be replaced, and nitrogen for the refill.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »


I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline arnego2

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Newbie few minor problems on new YZ 250 ''''04.
« Reply #2 on: October 29, 2012, 11:46:54 AM »
Sound like you need a new water seal of the water pump shaft. Maybe also the shaft. Did you look up the piston? When buying a used bike that is the first thing I could do. The shock you could repair it with a new shredder valve. It happened to me and I used a car tire valve. So far it is OK I think on the YZ250 you can change the valve anyway. The shock uses nitrogen 140psi is stock, I use 150psi.   

It is quite easy to do all the work yourself. Top end, Water pump shaft seal ( maybe also the shaft) plus the shredder valve you looking at about 4 to 6 hours. 
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline falk_ben

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Newbie few minor problems on new YZ 250 ''''''''04.
« Reply #3 on: October 31, 2012, 02:14:43 AM »
Thanks alot for the help.

I can remember changing the waterpump shaft on my crf, so i guess it's the same.

Why did you charge 150psi instead of 140psi?

Are my Pro Action suspension standard? I thought they would be KYB. If so would fork seal part numbers be different?

Can't wait to ride this beast  ;D!

« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline arnego2

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Newbie few minor problems on new YZ 250 ''''''''''''''''04.
« Reply #4 on: October 31, 2012, 11:39:15 AM »
I read about benefits of the higher charge, hard to tell if they are true, before I had hardly 70psi in there.
As for you suspension I'd give the company a call.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline msmola2002

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Pro Action have probably just revalved the suspension.

Your seals should be the same.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »