Freeway RPM's

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Biker326
    #1

    Freeway RPM's

    Hi all,

    I just converted my GS1000E from the stock chain and sprocket size to the 530 size chain and sprockets. When I did the switch I asked the fellow at the suzuki shop to help me choose a sprocket ratio that would lower my rpm's at freeway speed, ie ~75mph. I can't remember right now what ratio I put on the bike but my rpm's at 70mph right now are around 5k. Does that sound right or should I be able to get them lower without loosing bottom end power too much? I think I could still drop a few teeth on the rear sprocket, but before I buy another one I wanted to test the knowledge here. Sorry I don't remember off-hand what my tooth ratio is, I'll check it tonight and post that as well. Thanks in advance for any insight.
    Tags: None
    • Pharkmeh
      #2
      that is slightly lower than stock from my experience...


      and perfect revs for highway riding... I pull 5 k rpm's @ around 100kph/60mph


      these lovely 1000's dont get excited until 6k rpm's


      ... but when they do its just awesome....:shock:


      ... and they will do 7-8k ALL day long....\\/

        Comment

        • KGB
          Forum Guru
          • Nov 2002
          • 7146
          • Wilmington ma
          #3
          Stock gearing....i'm about 4K at 60mph/100kpm

          5K is just when it starts to breathe right :-D
          Keith
          -------------------------------------------
          1980 GS1000S, blue and white
          2015Triumph Trophy SE

          Ever notice you never see a motorcycle parked in front of a psychiatrist office?

            Comment

            • Road_Clam
              #4
              Originally posted by KGB
              Stock gearing....i'm about 4K at 60mph/100kpm

              5K is just when it starts to breathe right :-D

              and when your fingers start to go numb from the handlebar buzzzzzzzzzz


              I am geared 15/40, and I cruise at about 4600 rpm's at 70 mph.
              Last edited by Guest; 10-02-2006, 06:14 PM.

                Comment

                • getsum
                  #5
                  WOW---

                  I just had the bike out on the road this weekend and -----
                  78 GS1000

                  4000 RPMS at 70 mph ????????????

                  UHHHHHHH - Anyone know where I can look or what I can do to see what gear I have in the back...

                  I do not have a ton of power at low end , but man she screams at the top...

                  THanks

                    Comment

                    • KEITH KRAUSE
                      Forum Guru
                      Charter Member
                      GSResource Superstar
                      Past Site Supporter
                      • Oct 2002
                      • 8862
                      • Angeles Forest, So.Calif./Red rocks of Southern Utah.
                      #6
                      My '79 1000E indicates 70 mph just a hair past 4,000 rpm's. 4,050?
                      Stock gearing is 15/42. 19" front wheel, 17" rear. I believe your '80 is the same.
                      I plan to go to the 530 chain later and I'm probably going to run as close to stock ratio as I can, so I'm looking at 17/48 sprockets.
                      Since the 530 sprockets are smaller in diameter, I think you should run a 17 simply to keep the chain off the swingarm. Also, I think the chain makes too sharp a turn going around the smaller 530 15 sprocket. May cut into chain life, so I think a 17 prevents that too.
                      As for the rear, a 530 42 sprocket looks funny. A 48 is larger and looks right. The 17/48 combo will be pretty close to the stock 15/42. What is 15/42?...a ratio of 2.8/1? So 17/48 would be almost the same. So if you wanted a little lower cruising rpm's and you want the new sprockets to be nearly as large as the stock ones were, I'd say 17/45 would help and you shouldn't lose much power at lower speeds/around town.
                      And on the seventh day,after resting from all that he had done,God went for a ride on his GS!
                      Upon seeing that it was good, he went out again on his ZX14! But just a little bit faster!

                        Comment

                        • Guest
                          #7
                          I'm seeing the same rpm's as Keith, KBG and Clam. Miy '78 1000E is still running the original sprockets, slightly less then 10K mileage. Ray

                            Comment

                            • Biker326
                              #8
                              Thanks for all the input! My bike has been under the knife for quite a while, so this is the first time I've had her on the freeway in a long time... so I don't really remember what the engine speed was like before. My sprocket ratio is 15/40. The tach cable needs some lube, because the gauge jumps around a bit but as near as I can tell it's running 4700-4800 rpm at 70mph- which is about what road clam reported. Now that I've had a few days to commute on her I'm pretty happy with the setup; I think i'll leave well enough alone- I've got too many other ideas to spend my time and $ on as it is! Thanks again for all the help!

                                Comment

                                • Road_Clam
                                  #9
                                  Originally posted by Biker326
                                  Thanks for all the input! My bike has been under the knife for quite a while, so this is the first time I've had her on the freeway in a long time... so I don't really remember what the engine speed was like before. My sprocket ratio is 15/40. The tach cable needs some lube, because the gauge jumps around a bit but as near as I can tell it's running 4700-4800 rpm at 70mph- which is about what road clam reported. Now that I've had a few days to commute on her I'm pretty happy with the setup; I think i'll leave well enough alone- I've got too many other ideas to spend my time and $ on as it is! Thanks again for all the help!
                                  When I dropped my rear sprocket gearing from 42T to the 40T it made a noticable difference in lesser highway rpm's. I would say it dropped my cruise rpm's about 300 rpm's. I can't comment on other years, but as far as my '82 E model, Suzuki went with "drag race" close ratio gearing to get a lot of agressive acceleration off the showroom floor. Not well suited for extended highway cruising.

                                    Comment

                                    • Pharkmeh
                                      #10
                                      are you guys allowing for our lying lil speedo's

                                      Ive been checking mine lately after reading all your posts... cause I seem to be cranking a whole lot higher revs on the highway...

                                      I have always suspected the P.O. has a tighter sprocket on it - cause its like lightening off the mark - any gear actually....

                                      but at highway speeds I am over 5k rpm @ 140 kph....#-o over 6k rpm @ 160 kph...

                                      red line at 200 kph.....O

                                        Comment

                                        • Ninja_Lancer
                                          #11
                                          I'm pulling 7 grand at 75. Redline is 11,000 so I am ok.

                                            Comment

                                            Previous template Next
                                            Working...