Author Topic: GEARBOX SPROCKET BEARING REPLACEMENT  (Read 163 times)

teezer250

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GEARBOX SPROCKET BEARING REPLACEMENT
« on: July 18, 2018, 11:56:46 PM »
I am about to replace the output shaft front sprocket bearing and does anyone know if the inner of the bearing (where the balls are) should be greased beforehand and if so,what type.
This cannot be done after the bearing is fitted as it has a rubber seal on the outside and is too close to the gear cog on the inside.
In the workshop manual it is vague as to what is used,it shows what looks like an oil can with a G on it,(grease?/gear oil?

Toop

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Re: GEARBOX SPROCKET BEARING REPLACEMENT
« Reply #1 on: July 19, 2018, 01:37:42 AM »
Gear oil for me  ;)

teezer250

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Re: GEARBOX SPROCKET BEARING REPLACEMENT
« Reply #2 on: July 19, 2018, 10:16:53 AM »
Thanks toop,
I typed "yamaha engine lubricant symbols" into google and got the same answer after looking at the images shown.

Toop

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Re: GEARBOX SPROCKET BEARING REPLACEMENT
« Reply #3 on: July 19, 2018, 10:44:25 AM »
No problem,

In general, to mount an element with the lubricant which will use throughout its life is the correct way. Except for the O-rings and spi that must be avoided at start-up (before the lubrication is positive), in this case I put grease between the lips .... it will protect at the first start and will be diluted in oil next  ;) ;)

If in doubt, ask experienced mechanic  ;D Cheers !