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highway speeds, gearing

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  • highway speeds, gearing

    I just bought a o1 katana 600 to use for commuting its geared at 15/45. Ive never owned one of these high revving bikes before but at highway speeds in 6th gear im between 5000 and 6000 rpm. are these motors made to be ridden like that or do I need to gear it further for highway use?

  • #2
    5-6 grand is no problem That rpm is good for smooth acceleration when power is needed with out giant power surge Your just starting to wind it up

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    • #3
      My 97 kat sits close to 7 grand at 70 mph. These "high revving" bikes love it!
      My build thread (Black Betty) '97 600 (Dearly Departed)
      http://katriders.com/vb/showthread.php?t=133286
      2007 GSXR 750

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      • #4
        Yupers After V twins it took a bit to get use to it

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        • #5
          I went down 2 teeth on the rear cause I do looooots of highway. Didn't honestly really notice a difference. -3 or -4 you might start to, but I don't think I'll go any lower than I'm already at. Since the bike redlines around 11k, you're just past the middle of the RPM range. Same general ballpark as most other engines (at least in my own experience ) highway cruising usually is between 50-66% of redline.
          1998 Katana 750
          1992 Katana 1100
          2006 Ninja 250

          2006 Katana 600 RIP - 130k miles

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          • #6
            I dropped 4 teeth on my 600 wanted top end power It was there !!!!! Even after KN scorpion exhaust and jet kit it wouldn't redline only hit 130 mph but after dropping 4 .power all the way up changed speedo by about 15mph in 6th but gained it back with the extra rpm speedo showed 150 with steady power !! No reason to change any thing on this 750 Hope this helps somebody

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            • #7
              Originally posted by Fat Jack View Post
              I dropped 4 teeth on my 600 wanted top end power It was there !!!!! Even after KN scorpion exhaust and jet kit it wouldn't redline only hit 130 mph but after dropping 4 .power all the way up changed speedo by about 15mph in 6th but gained it back with the extra rpm speedo showed 150 with steady power !! No reason to change any thing on this 750 Hope this helps somebody
              On my FRONT SPROCKET oops

              Originally posted by Fat Jack View Post
              I dropped 4 teeth on my 600 wanted top end power It was there !!!!! Even after KN scorpion exhaust and jet kit it wouldn't redline only hit 130 mph but after dropping 4 .power all the way up changed speedo by about 15mph in 6th but gained it back with the extra rpm speedo showed 150 with steady power !! No reason to change any thing on this 750 Hope this helps somebody
              On my FRONT SPROCKET oops
              Last edited by Fat Jack; 04-23-2014, 10:43 PM. Reason: Automerged Doublepost

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              • #8
                Originally posted by Fat Jack View Post
                I dropped 4 teeth on my 600 wanted top end power It was there !!!!! Even after KN scorpion exhaust and jet kit it wouldn't redline only hit 130 mph but after dropping 4 .power all the way up changed speedo by about 15mph in 6th but gained it back with the extra rpm speedo showed 150 with steady power !! No reason to change any thing on this 750 Hope this helps somebody
                the speed signal generates from the front sprocket sensor. check with GPS for accurate speed info.
                never sleep with anyone crazier than yourself sigpic2011,2012,2013,2014,2015,2016

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                • #9
                  At 5-6k as said before you are just getting where the power starts. It can be a bit buzzy at highway speeds but that range seems to be a good torque rpm. The peak horse power is still higher up in the rpm range. These bikes think 5-6k rpm is easy cruising. The 600 hardly gets out of its own way below 5k so if you gear it to drop rpm be even more ready to shift down if you need to get around someone.

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                  • #10
                    I recently got an '04 750 and also had the same impression as brandon. I do try to keep in mind that the thing redlines above 11k, but am still pondering upping the drive cog a few teeth and/or dropping the rear chainring a few, mostly to try get more miles out of a tank of gas - the guys I ride with have miserly twins - and maybe drop a few revs at the same time. I'm thinking if it drops me a little farther away from torque/hp peaks I can quickly get the revs up with a tap or two of my left foot. Any guidance on max/front and min/rear sprocket sizes? As a starting point?
                    Thanks!

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                    • #11
                      Originally posted by freakngroovn View Post
                      I recently got an '04 750 and also had the same impression as brandon. I do try to keep in mind that the thing redlines above 11k, but am still pondering upping the drive cog a few teeth and/or dropping the rear chainring a few, mostly to try get more miles out of a tank of gas - the guys I ride with have miserly twins - and maybe drop a few revs at the same time. I'm thinking if it drops me a little farther away from torque/hp peaks I can quickly get the revs up with a tap or two of my left foot. Any guidance on max/front and min/rear sprocket sizes? As a starting point?
                      Thanks!
                      Stay with a 15 counter shaft up front any thing larger that that will require sprocket cover modification, any smaller will put too much pressure on the rollers of the chain.
                      You can drop 1-2 teeth in the back and lower the rev's at freeway speeds without loosing too much off the line speed.
                      With that said, do keep in mind these engines are made to rev high, that's where these engines make HP, so running near red line isn't really going to hurt them.
                      http://www.7thgeardesigns.com
                      http://www.lunchtimecigar.com
                      '90 Suzuki 750 Kat

                      "Shut up and drink your gin" - Fagin (Oliver Twist)
                      "But, as is the usual scenario with a Harley it was off-line when it crashed," Schwantz added dryly.
                      "You didn't hear what I meant to say" - my Son

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                      • #12
                        my bike had 15/48 when got it. went to 16 on front. did require a little grinding to clear. with Shinko Raven 160/60 rear I'm taching 5K@62mph. next chain I'm going with 16/47. now speedo is about 5mph fast and about 2% off on odo.
                        never sleep with anyone crazier than yourself sigpic2011,2012,2013,2014,2015,2016

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                        • #13
                          Thanks for the replies!

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                          • #14
                            I am new to the katriders
                            I have just got a 06 600 and it has the stock sprockets. I am in love with the bike, but I would love to get some more off the line punch. I dont care about top end but dont want to rev to high at highway speed and tear up stuff. Its 5k at 65 now with a 15 tooth on front. My question is how much is 1 tooth going to change rpm. I would love to at least be able to leave my buddy on his fzo7 from stoplight to stoplight.

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                            • #15
                              If I remember correctly one tooth on the front is about the same as three on the rear. I would go with a larger rear as it is easier on the sprocket in my opinion. I do not know what your rpms would be but probably still only several hundred rpm. The biggest problem is that your chain might not he long enough for a bigger rear sprocket. If any part has significant miles though, the chain and both sprockets will need changed.

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