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oil...... Where's it going ????

2K views 6 replies 5 participants last post by  Jeff in Kentucky 
#1 ·
07 ninja 650R. 62K mls.
I'll usually add a 1/2 pint or so of oil to the sump after 2- 150-200 mile day trips. I usually ride semi aggressive 5-7k rpm's. No visable oil, and I don't see an oil trail after hard accell. I've been using Amsoil 10-40W oil since 4K mls. have 2 valve stem clearance checks and re-shim when necessary. I'm suspecting the valve stem seals are worn.


Any help appreciated:
HR...
 
#3 ·
Oil isn't generally consumed on acceleration. When you decelerate, the crankcase is in vacuum, drawing oil up into the airbox where it is mixed with the air/fuel mixtures injected into the cylinder and burned.

As said above, pull the plugs and take a look at them, they should be the color of lightly toasted toast. Then, check your airbox to see if there is oil on the floor of the box.
 
#6 ·
wouldn't any leakage in the combustion chamber cause some blue smoke on start up rings, bad valve seat, or seals? Also I was told, Syn oils don't show blue color on start up. There's probably no use for the expense of Amsoil motor oil. There's a owner of a Honda F4i using Mobil 1 10-40W extended Miles auto oil since 5K mls. and has 300K mls!! much cheaper to top off.


Thanks for reply:
HR...
 
#7 ·
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