Maintenance & Technical > KX250 / KX125

Main Bearing Repacement

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jonny500:
you need the correct flywheel puller, they are on ebay. there is a pic below showing 2 pullers. the 1 on the left in the correct 1. i would not advise using the 1 on the right as that 1 can deform the flywheel. i would buy the correct tool for the job as anything else would damage the components, dont try and prise it off, again this will result in damage. to use the puller, wind out the center screw so that it will clear the end of the crank shaft then screw the boss (left hand thread) in to the center of the flywheel until it seats. wind the center screw in and put some pressure on. give the flywheel a light tap with a hammer, it may come off it may not, if not apply more pressure with the center screw, another light tap. continune until does come off. while you are spliting the cases i would do all that need doing
any probs post again
regards
john

mustangfury:
Ok, I got the puller yesterday and the motor is ready for splitting. Is there a gasket between the cases that will need replacing?  Also, besides the loose bearings and the main shaft seals, is there anything else I should look to replace, specifically, while i have the case apart? Are there any common things that should be replaced any time you open the crank?  Just want to do this right the first time.

I appreciate the help.

Stang

BDI:
When you pull the flywheel put a little grease on the end of the cranke so the puller does not guald up the end of the crank. Things I would recommend replacing are the output shaft bearing and the shift forks. there is no gasket between the cases just sealer.

jonny500:
the most cost effective thing to do is get a complete set of seals and gaskets from ebay. as bdi said thare is no gasket in the center. the mains need doing, the crank seals are a must. i suppose anything else is upto you. depends on how long you plan on keeping the bike and how hard you ride and the budget you are on. perhaps split the cases and post some photos of the components and we can have a look.

mustangfury:
I greased the end of the puller and put a washer over the end of the crank to get the flywheel off. Came off real easy.

I will take pictures once i break down the motor and will post them. 

Stang

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