Announcement

Collapse
No announcement yet.

Gs850 + boost?

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

    Gs850 + boost?

    A buddy of mine bought my old gs850 and is dead set on pushing about 6 to 8psi through it. The bike is a solid runner. But im worried about somthing coming apart and hurting him or some crap. Also im not gonna talk him out of it cause it'd be really cool to see it boost but. So what would be some weak points to check/ beef up? Clutch? Oil pump? It wont be a race bike so i dont think he'll need to weld the crank?
    I build Pipers

    https://farm5.staticflickr.com/4842/...b592dc4d_m.jpg

    #2
    20160808_200447.jpg i think thats a pic of the 850 and my 1000 if it uploads
    I build Pipers

    https://farm5.staticflickr.com/4842/...b592dc4d_m.jpg

    Comment


      #3
      I'd turn the boost up. Way up.
      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

      Life is too short to ride an L.

      Comment


        #4
        Stay away from the rich chocolate, it clogs up the pilot jets something awful.
        :cool:GSRick
        No God, no peace. Know God, know peace.

        Eric Bang RIP 9/5/2018
        Have some bikes ready for us when we meet up.

        Comment


          #5
          Originally posted by tkent02 View Post
          I'd turn the boost up. Way up.
          really nice ride. I'm with Tkent, turn it up high, and if you can go even higher...

          Comment


            #6
            I'd try at least 20 lbs of boost... on BOTH of those!

            Comment


              #7
              If he's pulling the motor down then tell him to put a plate underneath the base gasket to lower the compression a tad (those aluminium road signs are a nice thickness - don't know how I know that.....)

              Then boost the crap out of it.
              Current:
              Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

              Past:
              VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
              And a bunch of other crap Yamahas....

              Comment


                #8
                So you guys really arnt concerned about it coming apart under boost?
                I build Pipers

                https://farm5.staticflickr.com/4842/...b592dc4d_m.jpg

                Comment


                  #9
                  Originally posted by thebrandonbeezy View Post
                  So you guys really arnt concerned about it coming apart under boost?
                  Personally, I think there is a LOT of tongue-in-cheek going on, but it's based on your picture and the description in your signature:
                  1980 gs1000g (current café crapola project)

                  These engines are, indeed, rather bulletproof, but there are limits. Hillsy's suggestion to lower the compression just a bit is probably spot-on, but keep in mind that in stock form, the 850 is already just a bit under powered. Lowering the compression will make even less power until you get on boost, and in the real world, that will be a very small percentage of the time. What you will end up with is a huge, heavy bike (or what's left of it, based on your picture) that will have trouble getting out of its own way.

                  Yeah, most of the comments are based on the appearance. There isn't a whole lot of love here for "cafe" or "bobber" bikes. Most of that is because of the proliferation of poorly (or not-) engineered projects that are unsafe and uncomfortable. Simply looking at the basic concept of a "cafe" bike shows where so many go wrong. The original cafe racers did race from cafe to cafe. Any part of their bike that added weight without making it go faster or handle better got removed. Your turbo project will add a fair amount of weight. Yeah, it will make it go faster occasionally, but will just be dead weight most of the time.

                  There are many suggestions to "boost it" to increasing levels. I think they are meant to blow your bike up and save you from personal destruction. Personally, I say "don't boost it, we need the parts".
                  If you're not living on the edge, you're taking up too much space.

                  Comment


                    #10
                    what the hell, boost the boost....nitrous it as well!
                    1978 GS1085.

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

                    Comment


                      #11
                      Strap on a large drip pan underneath to catch the parts.
                      ---- Dave

                      Only a dog knows why a motorcyclist sticks his head out of a car window

                      Comment


                        #12
                        yeah the 850 is in rough shape, I sold it a year and a half ago to a kid who kept it in a barn the entire time and never road it. sadly it got banged around wile in that barn and stripped down. then I heard it was for sale and convinced my buddy leon to buy it. now as for the half assedness that most café/bobber builds get neither of these bikes will fall into that category. my buddy just got the 850 3 days ago and hasn't really gotten to "beautifying" it and as for my 1000 café bike itll probably never be pretty but it wont be unsafe or dangerous or half assed. just need to know the original question. is the solid running low mile 850 going to take 6-8 psi of boost. and with all the weight stripped off the turbo should bring it to around stock weight?
                        I build Pipers

                        https://farm5.staticflickr.com/4842/...b592dc4d_m.jpg

                        Comment


                          #13
                          Also thanks for tge 2 non sarcastic replys he's going to Turbo what whether I tell him to or not. He's stubborn that way.
                          I build Pipers

                          https://farm5.staticflickr.com/4842/...b592dc4d_m.jpg

                          Comment


                            #14
                            After it's boosted, twist it up to around nine grand and dump the clutch.

                            Comment


                              #15
                              Those two bikes look ... um, rather undermaintained, and most folks around here find the bobber crowd a bit less than ideal when it comes to focusing on building a bike right ("let's cut **** off and weld **** where it doesn't belong"). So, when you asked about what we will suppose is a turbocharging application, you may have opened yourself up to some Spinal Tappishness.
                              "Thought he, it is a wicked world in all meridians; I'll die a pagan."
                              ~Herman Melville

                              2016 1200 Superlow
                              1982 CB900f

                              Comment

                              Working...
                              X