markg Posted June 4, 2014 Report Share Posted June 4, 2014 Hi all, The main bearings in my Jumbo are growling suggesting needing new ones. Question is - do I have to split the cases to replace like the bultaco engine? Anything I should look out for whilst replacing these? Thanks in advance! Markg Quote Link to comment Share on other sites More sharing options...
lineaway Posted June 5, 2014 Report Share Posted June 5, 2014 Yes you do have to split the motor. Been awhile for me too, so pay attention to the timing on the rotary intake. Also clean up the gearshift/kickstart shaft while you are at it. Quote Link to comment Share on other sites More sharing options...
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