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just fitted a 15t on my TLS

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  • #1

    just fitted a 15t on my TLS

    Hey all just got my TLS back fitted a 15t to it standerd rear and well holy #$%^ i thought a tls wheelied well to start with but now. I'm no wheelie master but it has no probs gettin it up in second on the power, first is just insane, i think it mite even br able to clutch up in third. Took it on a decent ride my feul ecomony has dropped a bit but im not to fussed coz when was it good in the first place. It will hit the limiter in top no worries now and it pulls real well in any gear at any revs. Hanging out for a trackday soon. Has anyone fitted a 15t as well what are your thoughts on it i know heaps go for the 16t with good outcomes. The speedos way out though i've heard of a recalibator from blackrobotics is this the way to goto slove this or is there an easier cheaper way. Cheers wheelie on......
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  • #2
    15T, Never heard of it being done. You'd better watch for the chain eating into the swingarm guide and the swingarm itself.

    The yellowbox is the way to go for recalibrating the speedo, of fit a pushbike speedo...

    17/38 = 2.235:1
    15/38 = 2.533:1

    If I wanted that ratio, I'd personally go with

    17/43 = 2.529:1

    You are looking at 12% more stress on the chain with the 15T front, plus the extra wear and losses from the tight radius.
    "I spent most of my money on Scotch, women and cigarettes. The rest I just wasted"

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    • #3
      i can wheelie my tls in 3rd without the clutch now. so needless tto say i do most of mine in second gear. ist gear is insame with my 17/40 gear ratio... i do balance point wheelies in second.

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      • #4
        yea i'm keepin an eye on the swingarm gaurd i wondered about that if it does start eating in i'll change to the 17/43 youve suggested coz it wont be worth the hassle replacing the gaurds, i went for the 15t as it was cheaper than a 43t (poor)(very poor).
        I fitted a new x-ring at the time as well. cheers on the speedo prob as well.

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        • #5
          My RC 51 riding buddy runs a 15T in front. That thing accelerates like a cannon shot.

          I need to lower my gearing a tad. I want to keep the stock 17T, just stick a 40 or 41 out back and I think life would be grand. Alas, I just put a new chain on and cut it to length. Wish I would had this brainchild about 2,500 miles ago
          "The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man." - George Bernard Shaw

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          • #6
            Wow! i bet that thing runs through gears at a mile a minute!

            One day.. I may do it.. but I don't want to do the Yellowbox...
            I want an easier way to make it all work!

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            • #7
              Originally posted by rzarobbie
              One day.. I may do it.. but I don't want to do the Yellowbox...
              Why no yellowbox? It's a brilliant little device, a little expensive perhaps, but so are tickets.

              Unless you get hold of some other type of speedo recalibrator, there is no simpler fix.
              "I spent most of my money on Scotch, women and cigarettes. The rest I just wasted"

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              • #8
                I am a cheap guy in general..... when I re-geared my SVS I didn't have to get a yellowbox, nor do GSXR owners.. so why did we get

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                • #9
                  GSXR owners do! Any bike that has an electronic sensor that picks up on the front sprocket needs their speedo's recalibrated with a gearing change.

                  Old front wheel cable drive speedo's aren't affected by gearing changes. So it's not just TL riders that are , it is all modern GSXR riders, Hayabusa owners etc, any electronic speedo bikes. (Yamaha, Kawasaki etc, etc).
                  "I spent most of my money on Scotch, women and cigarettes. The rest I just wasted"

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                  • #10
                    Originally posted by Steve TLS
                    GSXR owners do! Any bike that has an electronic sensor that picks up on the front sprocket needs their speedo's recalibrated with a gearing change.

                    Old front wheel cable drive speedo's aren't affected by gearing changes. So it's not just TL riders that are , it is all modern GSXR riders, Hayabusa owners etc, any electronic speedo bikes. (Yamaha, Kawasaki etc, etc).
                    Seriously? Wow! I better tell my GSXR friends.. I have three friends who have NEVER heard of a yellow-box, and 2 of which have re-geared their bikes. What is also funny is I was talking with the Parts Manager of the biggest Motorcycle dealer here in Colorado (Friend of a friend)... he was riding a 2002 GSXR and we were talking about re-gearing my bike.. I mentioned a Yellow-Box and he got super Confused...

                    So do you need to Yellow-Box if you change the Rear Sprocket?

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                    • #11
                      Yep, any final drive gearing change, front or rear sprocket, your GSXR buddies have speedo's that are off.

                      I think Honda's VFR750 as far back as 90 had electronic speedo's, I couldn't tell you what year the GSXR's went to them, possibly with the introduction of fuel injection on each model.

                      Anyway the easiest way to check. If there is no speedo cable coming from the front wheel at the bottom of the forks, they need to re-calibrate their speedo's with gearing changes.

                      You might think the Yellowbox is expensive, but it can be used for all you gearing changes and its setting changed to suit, and the one model fits just about all bikes, so if you got rid of the TL and *cough* bought a GSXR, you could fit it on that then.
                      "I spent most of my money on Scotch, women and cigarettes. The rest I just wasted"

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                      • #12
                        Originally posted by Steve TLS
                        You might think the Yellowbox is expensive, but it can be used for all you gearing changes and its setting changed to suit, and the one model fits just about all bikes, so if you got rid of the TL and *cough* bought a GSXR, you could fit it on that then.
                        Bike your Tongue Steve... One day it will probably happen.. but that is still a ways away. Next up is Busa Body work.. and hopefully that will tide me over for a while!

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                        • #13
                          I just steped off my buddy's 94 900RR. He's running 6 up on the rear. I had riden it befor but never really got a chance to put it through it's paces in any reasonable fashion. Well, he let me borrow it tonight. WOW!. The thing comes out of the hole like a bat outa hell. But does it smoothly. I was pretty impressed. I think my next sproket set is gona be going up a few more teeth. Either a 17/43 or 16/40. I think 6 up on mine would be overkill around town. My buddy's 900 is a stunt bike so he can take advantage of it. My TL isn't.
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                          • #14
                            Going to shift this over to performance

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                            • #15
                              Originally posted by Steve TLS
                              15T, Never heard of it being done. You'd better watch for the chain eating into the swingarm guide and the swingarm itself.

                              The yellowbox is the way to go for recalibrating the speedo, of fit a pushbike speedo...

                              17/38 = 2.235:1
                              15/38 = 2.533:1

                              If I wanted that ratio, I'd personally go with

                              17/43 = 2.529:1

                              You are looking at 12% more stress on the chain with the 15T front, plus the extra wear and losses from the tight radius.

                              Sorry mate I think it's more like 11.9%

                              Dam!! What do you do? are a maths teacher of something?
                              Ryan, ORIGIN: Irish - from the Gaelic 'Rigan' meaning 'Little King'. A Common Surname since the early 1940s. CHARACTERISTCS: Compassionate, Loyal and Trustworthy. Communicative, Often a good listener and equally a good Advisor. A great Purswader. Enjoys Close Relationships. A Caring Friend.

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