twowheelfanatic Posted June 8, 2016 Report Share Posted June 8, 2016 how many of you guys are having crank bearing troubles?my 14 300pro after 100 hours has ate the crank bearing.i change oil after every 4 hours of ride time.i understand that gas gas had problems with a run of bad bearings.and their money problems they just kept using the bearings they had knowing that a certain percentage of them were doomed to fail Quote Link to comment Share on other sites More sharing options...
zuendapp Posted June 8, 2016 Report Share Posted June 8, 2016 I would be interested in knowing what type of transmission oil? GM Blue water? ATF? Motorcycle gear oil? Thanks for your help Terry Quote Link to comment Share on other sites More sharing options...
baldilocks Posted June 8, 2016 Report Share Posted June 8, 2016 My march 2014 bike is still running its original main bearings. I think there were some issues, one guy near me had them replaced on a 2015 model. Quote Link to comment Share on other sites More sharing options...
paulmac Posted June 8, 2016 Report Share Posted June 8, 2016 Had this happen to me in the past. From memory there is a tiny oil feed hole in the bearing that has to line up with a corresponding hole in the crank case. The bearing can spin in the journal and get out of line thus starving it of oil. I think the fix on mine was to replace the bearings and pop a 'punch' mark on the bearing outer and housing to hold it in place. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted June 8, 2016 Report Share Posted June 8, 2016 my 2013 factory racing was fine, a top rider near me has a 2015 bike thats done two scottishes on same set so dont think its that common Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted June 8, 2016 Report Share Posted June 8, 2016 (edited) Did my 2008 after 300+ hours, and they could have done plenty more I guess (but I had everything loose). With mostly atf. Probably it depens on riding style, warmup, and a bit of luck aswell. I would not say its a standard problem. Luckaly they are easy to fix, so fix and ride! BROAP Edited June 8, 2016 by crazybond700 1 Quote Link to comment Share on other sites More sharing options...
twowheelfanatic Posted June 8, 2016 Author Report Share Posted June 8, 2016 a friend of mine when his 2015 300 was new his was apart 3 times with this problem before he got a good set of bearings.i run atf in mine every 4 hours i change it Quote Link to comment Share on other sites More sharing options...
lineaway Posted June 9, 2016 Report Share Posted June 9, 2016 We had an early `15 do it in our club. Not anymore that I can think of, but Ossa had a bad run of `14 factory coming out of the same place. Quote Link to comment Share on other sites More sharing options...
monty_jon Posted June 9, 2016 Report Share Posted June 9, 2016 (edited) I have an 04 250 pro and it still has the same bearings as when I purchased it 6 years ago (I've never touched the motor), I change the oil every 6 or 7 months! and it still runs as good as the day I purchased it! do people really change there oil every 4 hours, that means I would be changing mine 15+ times a year !?!?!?! Edited June 9, 2016 by monty_jon Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted June 9, 2016 Report Share Posted June 9, 2016 (edited) A 04 even has got the old style bearings. Newer bikes (05 onwards) have got bearing ''packages''. Bearings and seals inside one unit. Oil, especially ATF needs regular replacement. How much you do is your own choice, have seen plenty of bikes running much more hours before replacement without any problems. Edited June 9, 2016 by crazybond700 Quote Link to comment Share on other sites More sharing options...
baldilocks Posted June 10, 2016 Report Share Posted June 10, 2016 When I can't see the metal on the other side of the oil window i change it. At the ssdt I would change it after the third day, probably done 250 miles at that stage and 20 hours approx. Quote Link to comment Share on other sites More sharing options...
heffergm Posted June 11, 2016 Report Share Posted June 11, 2016 Good to know. I guess I'm safe after 100 hours Quote Link to comment Share on other sites More sharing options...
sirsherco1 Posted June 23, 2016 Report Share Posted June 23, 2016 I had to have mine replaced after about 8 hrs riding, under warranty after a huge fight with dealer, case hardening on ball bearings going. mind you mine is the 2014/15 eco 250 parts bins special so who knows of the origin of some of the parts? Quote Link to comment Share on other sites More sharing options...
mbeers6 Posted June 23, 2016 Report Share Posted June 23, 2016 What are the first signs that the bearings are going out? Is there a noticeable noise? Quote Link to comment Share on other sites More sharing options...
barryb1973 Posted June 23, 2016 Report Share Posted June 23, 2016 think mine have gone 2015 250 ,havnt had bike long started knocking, with it not having much use i thought it was more of a fuelling issue sort of pinking so ive altered slide and jetting trying to cure it but didnt really help,now knocking worse and smoking, theirs no play in flywheel so im assuming oil side bearing and seal have gone,does anyone know sizes of bearing and seals that i need Quote Link to comment Share on other sites More sharing options...
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