Question about 2003 Yamaha YZ 125

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What should the torque on my front sprocket nut be? yz125 03

I just checked it and it seems to be finger tight with the lock washer bent over...will it do any damage??

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Hi, Mark for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
torque specs Yamaha 2 Stroke
Third time have lost front sprocket nut
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on Jul 18, 2016

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actionscuba

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SOURCE: cant undo nut

No they are not left hand thead,normal r/h thread.
make sure chain is still on bike and front sproket and then try good rattle gun. if this does not work,put bike in gear and hold on rear brake and use long breaker bar, if still no good will need to heat front sproket nut with oxy set very carefully and rattle off with rattle gun while nut is hot

Posted on Jun 24, 2010

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Kx450f front sprocket coming off


There is a bendable tang washer that goes under the nut. From factory te nuts are extremely tight to get off. You need to put the lock washer underneath the nut, tighten it as tight as you can with a breaker bar then bend the washer in a couple of places over the flat sides of the nut to lock it for good.

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I have to replace the front and rear spoket, on a 1991 Suzuki GSX-R 750.I need the torque spec for the frount and the rear.


Just make sure the bolts are tight on the rear wheel if you still have stock nuts they should be a style of locking nuts. The counter shaft sprocket if you have an 3/8 impact thats perfect. It should also have a nut washer on it. tight is right my friend, you dont really need to worry about torque specs unless you have a gasket involved.
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Having problems undoing front sprocket ! Would it be left-hand thread Also cant get socket on very far do i need a special socket as its got two different sizes 27mm on first part of nut and 32mm on rear...


There should be a bent washer over the nut to stop it from turning. Have a good look.
Flatten the bent washer with a flat cold chisel, gently, as you need it again! Put the bike in top gear to hold the sprocket and use a spanner 27mm to undo the nut. It is a clockwise thread.
When you put a sprocket back on, don't forget the bent washer and a drop of Loctite Threadlock will help to hold it on.

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The rotor should come right off but you'll have to put two bolts in the holes on the rotor and squeeze them together to get a grip on the rotor to pull it off. The magnitism force is quite strong.

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1 Answer

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