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oiling mod for the 04/05 10r

9K views 17 replies 10 participants last post by  Morgansport 
#1 ·
I have a 04 zx10 grudge bike I recently purchased, the bike had a spunt bearing on the #3 journal. I keep hearing about a crank and lower engine case mod for additional oil flow. Also I have heard of adding a AN washer to the oil relief to raise the oil pressure. If anyone has any info pm me.
 
#2 ·
#7 ·
Not ZX10R related, but on my race bike (Yamaha FZR400) which is also an engine rather known for oil starvation issues, I just took apart the standard oil pressure valve, found a washer the right size to shim the spring, and put it back together. Don't know the effect on oil pressure but it has to be higher.
 
#9 ·
Yeah there is a case mod too. Kawasaki seems to offset the hole in the case for oil flow slightly. This is a restriction. Enlarging the hole allows faster flow rate. This is only needed to be done on very high hp motors. Like in excess of 250hp or even more. But for stock motors, small nitrous or turbo builds and uptown 3mil over bores the oil relief valve is sufficient. But big grudge motors should research the oil flow hole in the case like mentioned. On psycho bike cycle concepts discussed the offset oil hole in the cases in a thread a while ago. They have worked on numerous grudge 10r motors and discovered that to be a oil starvation concern on HIGH horsepower 10R's.
 
#10 ·
The case mod is a bit more labor intensive if I remember correctly but if the thread starters bike already spun a bearing in the past, this should likely be done. Raising the oil pressure 30 psi by upgrading the relief valve won't help the oil flow any faster , well it will, but the case mod really helps to circulate the oil.

Is your motor NA or boosted?
 
#11 ·
A few more PSI of oil pressure won't make the sort of huge difference that a radically-different-from-stock engine may need. But for something that is juuuuust on the edge, it should help to tilt things towards being on the right side of the edge.
 
#12 ·
That oil valve increases pressure 35%. Not really " a little increase". That's dramatic increase.
 
#14 ·
:thumbsup:
Sounds like you are taking the needed precautions. The case mod and upgraded oil valve will ensure you won't have any oiling issues. May want to check and see if any of the after market low pro oil pans have a baffle. I assume you are running either a cut stock pan or after market low profile one. just another step you can take.
 
#17 ·
Wow. This is a hell of a thread resurrection. Five years! Woohoo!!! :welcome:

Uh, to answer your question....it doesn't work like that. Four or 5 blades is pretty meaningless. Depending on which one can move more oil based on how fast it turns, how wide the rotor is, how big the supply and outflow lines are, that will determine how much oil it can move. So don't worry about how many "blades" you can count, cause that doesn't matter. Stick with the one designed for the bike you got.
 
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