Maintenance & Technical > KX500 Original

Main Journal specs?

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Motorrad:
Anyone have the specs for what the main journal should measure?   

Both where the main bearing sits and where the main seals ride.....

Mine is measuring between 1.181" and 1.1795"   depending on where I measure.

kaw rider:
you know that journal has 2 steps to it. I would say .002" bigger then id of bearing.

DoldGuy:
Motorad,
I was told by ......... Seal surface 1.179 Bearing surface 1.181
DoldGuy

jonny500:
i was told only last week that 1 journal is slightly bigger than the other side. my response was, is that why 1 bearing seems to stay on the crank when spliting the cases. he said 'correct'. is this right anyone :?

dave916:

--- Quote from: Motorrad on December 08, 2010, 03:41:02 PM ---Anyone have the specs for what the main journal should measure?   

Both where the main bearing sits and where the main seals ride.....

Mine is measuring between 1.181" and 1.1795"   depending on where I measure.

--- End quote ---


if the jounal is worn it will have a polished (chrome) look where the bearing spun,[common problem on kx]  worth double checking if the main bearing stayed in cases when taking motor apart ,
if you new bearing seem tigher on the crank than the old main bearing ,may be another sign {dont push the new one on to far
if the journal it tight you should see marks  running at 90degree to the crank web on the journal   
 i always check for any side movement on crank { big flat screwdriver between the crank and cases} when i have the topend off,as worn cases annd crank are common on kx
 

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