Announcement

Collapse
No announcement yet.

GS1000 external Top End oil feed

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    GS1000 external Top End oil feed

    What size hose is recommended for an external feed to the cams? I am thinking AN-3 would be ok, possibly AN-4 but that maybe overkill and flood the top end.
    Thoughts anyone?
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!

    #2
    I read through this old thread on top-end oiler kits.
    There is no actual hose sizing and yes i realize it is for the 16 valver but there is some discussion on amount of flow.
    It MIGHT be of some value to you.
    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.
    2@ \'78 GS1000

    Comment


      #3
      You can install a set of oil pump gears from a 750 to increase oil flow to the top end. That's about all you should have to do, and even that is not typically 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

      Comment


        #4
        Originally posted by Nessism View Post
        You can install a set of oil pump gears from a 750 to increase oil flow to the top end. That's about all you should have to do, and even that is not typically needed.
        already fitted the 750 oil pump gears. the top end oil feed is extra precaution for an upgraded top end.
        1978 GS1085.

        Just remember, an opinion without 3.14 is just an onion!

        Comment


          #5
          The 8V engines have those pockets in the head so every time the cam comes around it dips into a pool of oil. Adding more oil to the pool won't improve lubrication, it will just increase the amount of all that is spilling over the pockets and falling down the cam chain tunnel and onto the crank, increasing windage.

          Running an external oil line could have a small benefit of reducing the tenancy for oil leaks at the head gasket studs. Not sure it's worth all that extra complexity though. The way to reliability is to keep the system as simple as possible with the minimal number of joints in the system. If you insist regardless, the -3 size lines should be fine. Same size as brake lines. That's what most 16V top end oilers use anyway.
          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

          Comment


            #6
            Originally posted by Agemax View Post
            already fitted the 750 oil pump gears. the top end oil feed is extra precaution for an upgraded top end.
            Not really needed IMO. We've been roadracing our 1000 for several seasons now using cams with more than .440in lift and good springs....750 oil pump gears and the standard feed system. No problems.

            Comment


              #7
              Thanks for the input. 3-AN it is then .
              1978 GS1085.

              Just remember, an opinion without 3.14 is just an onion!

              Comment


                #8
                Originally posted by Agemax View Post
                Thanks for the input. 3-AN it is then .
                You're a total bling-hound aren't you, LOL....Red fittings to match the clutch cover bits ?

                Comment


                  #9
                  Originally posted by GregT View Post
                  You're a total bling-hound aren't you, LOL....Red fittings to match the clutch cover bits ?
                  haha, no red bits on the white GS any more.
                  This is for my new build, no bling on this one.
                  1978 GS1085.

                  Just remember, an opinion without 3.14 is just an onion!

                  Comment


                    #10
                    Originally posted by GregT View Post
                    Not really needed IMO. We've been roadracing our 1000 for several seasons now using cams with more than .440in lift and good springs....750 oil pump gears and the standard feed system. No problems.
                    That's nice to know👍
                    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


                      #11
                      Did this on my old GS1000, used brake line hose AN-3 the motor was 1100cc hi comp, Anderson S3 cams under bucket shims HD valve springs ported CV head gsx750et (4v) oil pump gears, CR35mm carbs etc,etc. Didn't need the external feeds but they looked good and made the bike stand out abit more, and why not :-)

                      Comment


                        #12
                        There is also the advantage of having cooler oil going to the cams rather than having it heated as it travels up the studs.
                        • Suzuki GS1100 for racing
                        • Suzuki GS1000S for nostalgia
                        • Yamaha FZR1000 for touring
                        • Yamaha TR1 for a project

                        "to do something well is so worthwhile that to die trying to do it better cannot be foolhardy. Indeed, life is not measured in years alone but in achievement...." Bruce McLaren

                        Comment

                        Working...
                        X