Overhead oilers. ?

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  • 4cyl h2
    • Jan 2026

    #1

    Overhead oilers. ?

    Are these setup to increase pressure like the restrictor tap for a turbo. Or just a volume thing
  • jwhelan65

    #2
    Both actually I think..

    Comment

    • madmikeracing

      #3
      With the use of larger diameter Cylinder Block Studs ( I ALWAYS do both the crankcase and cylinder block studs on all my engines I build as well as 750 pump gears) the reduced oil flow to the head is detrimental. With the addition of Head Oiler system as well as 750 oil pump Gears set you get sufficient volume and a very slight pressure increase. The extra oil volume makes life a bit better for the Cylinder head Springs ,cams, rockers. I make my own head oilers and also make titanium oiler bolts. They are way superior to the aluminum ones someone has been making and selling in my Opinion)The aluminum oiler bolts made in the states arent very strong. I have had broken Oiler head Bolts (anodized aluminum ) ones in motors people have brought me to repair. Anyhow that's it. Thanks Mike

      Comment

      • madmikeracing

        #4
        Heres a picture of some oilers I hacked out I haven't finished the 45 degree chamfer pass o nthem as my new cnc took a ****. I just repaired it bad transformer and soon will finish them up over xmas time, Anyhow merry xmas everyone Mike
        Attached Files

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        • madmikeracing

          #5
          Heres vsome Titaniumn Oil er Bolts I made. I didnt want to have them fracture or crack like Ive seen alloy models. Mike
          Attached Files

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          • rapidray
            Forum Guru
            GSResource Superstar
            • Oct 2006
            • 8195
            • So Cal

            #6
            All the years I have been installing oilers, I have NEVER broken an aluminum bolt. Then again, I KNOW how to install them & the fact that they don't require a lot of torque to make seal. For you to IMPLY that the aluminum bolts are inferior is just you trying to scare people into buying an EXPENSIVE titanium bolt, you are selling, that just isn't required. Rick Ward makes great parts, as does my friend GregB here that made a bunch of oilers too. Anyone that breaks those bolts is due to their own fault!! To answer your question 4cyl h2, the top end oilers do NOT increase the oil pressure. They were designed to put more oil to the cams & rocker arms to increase oiling. The side benefit is that they put more oil on the springs also, which helps cool the valve springs, extending spring life. Yes, you should be using 750 oil pump gears with a performance build to help put more oil up top.
            Ray.

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            • 4cyl h2

              #7
              Is it ok then to get the oil from any port?? Like right side of engine case??

              Comment

              • posplayr
                Forum LongTimer
                GSResource Superstar
                Past Site Supporter
                • Dec 2007
                • 23673
                • Tucson Az

                #8
                You might find this of interest..............

                Technical Info posts that are deemed to be important or popular will be placed here for easier access. If you feel a post should be moved from the Technical Info forum to here then PM the Administrator with your request.

                Comment

                • madmikeracing

                  #9
                  Ray Im not selling them. I make them for my engines only as well as my friends. The alloy bolts were on the last katana that came into my Hobby Shop. The oiler bolts had cracked causing Oil leakage and one was snapped right clean of. That's the first time I even looked at one of those head oilers from Mr Ward. I did love the Oiler the gentleman on the GS resources made up and sold to some fellows. A very nicely thought out Project, (Sorry I don't recall your name.) I'm not slamming anyone's stuff. Guess its Buyer Beware!!

                  Comment

                  • posplayr
                    Forum LongTimer
                    GSResource Superstar
                    Past Site Supporter
                    • Dec 2007
                    • 23673
                    • Tucson Az

                    #10
                    Originally posted by madmikeracing
                    I did love the Oiler the gentleman on the GS resources made up and sold to some fellows. A very nicely thought out Project, (Sorry I don't recall your name.) I'm not slamming anyone's stuff. Guess its Buyer Beware!!
                    GregB.........................

                    Comment

                    • storm 64
                      Forum Sage
                      Past Site Supporter
                      Super Site Supporter
                      • May 2012
                      • 4580
                      • Youngstown,Ohio

                      #11
                      Originally posted by posplayr
                      GregB.........................
                      I bought a Top End Oiling kit off of Greg. Very nice kit (top quality) and his price was a bargain also. I'm not sure if he has any kits for sale now. But with some interest, I bet he could probably run another batch of them.
                      My Motorcycles:
                      22 Kawasaki Z900 RS (Candy Tone Blue)
                      22 BMW K1600GT (Probably been to a town near you)
                      82 1100e Drag Bike (needs race engine)
                      81 1100e Street Bike (with race engine)
                      79 1000e (all original)
                      82 850g (all original)
                      80 KZ 650F (needs restored)

                      Comment

                      • Guest

                        #12
                        Does anybody lnow if these can be run with a turbo if the turbo nses the same supply feed as the top end oiler.

                        Comment

                        • rapidray
                          Forum Guru
                          GSResource Superstar
                          • Oct 2006
                          • 8195
                          • So Cal

                          #13
                          John, all the turbo stuff I have done, we build a separate 2 quart reservoir for the turbo to have it's own oil supply. That keeps all of the clutch material out of the turbo. Street stuff, I'm not sure. Blowerbike will know!
                          Ray.

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                          • Nessism
                            Forum LongTimer
                            GSResource Superstar
                            Past Site Supporter
                            Super Site Supporter
                            • Mar 2006
                            • 35783
                            • Torrance, CA

                            #14
                            I think the normal oil flow path through the cylinder isn't needed when using a top end feeder. I think guys call blocking the passages "dry blocking" or something to this effect. If you do this there should be enough oil supply to feed a turbo but obviously, the flow must be managed overall to control flow where it's needed.
                            Ed

                            To measure is to know.

                            Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                            Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                            Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                            KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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                            • blowerbike
                              Forum Guru
                              GSResource Superstar
                              • Aug 2008
                              • 7057
                              • Ohio Closer to KY Than Cleveland

                              #15
                              top end oilers look cool but i have never needed one on a turbo bike.
                              keeping the oil separate from the engine would be great if it was simple and inexpensive but i have never damaged a rajay turbo except when i broke my pump gears.
                              i have broke 2 sets of pump gears in total...both was 750 ratio gears.

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