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Thread: 17T Front and 40T Rear Sprocket - 550

  1. #1
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    17T Front and 40T Rear Sprocket - 550

    Hi Guys,

    As the title suggest, just wondering if anyone has had an experience with fitting front and rear sprockets that help with highway riding. At the moment im at around 5800 - 6000 rpm when im doing 105km/h. At the moment the setup is 15t/42t

    Will a 17t/40t fit?

    Cheers.

  2. #2
    apriliaforum expert
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    I run 16/44 and am happy with it...

    Go a 16 on the front and try that...

    Cheap and will make a difference...

  3. #3
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    A little too late D: Already got the 17t front. Just waiting for the 40t rear to come in the mail. Will the front 17t sprocket fit?

  4. #4
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    Yeah 17 fits, I tested one once...

    You while need to trim a little from the chain guide near the swing arm pivot and remove a little bit from the swing arm in the same area...

    A 40 on the rear main cause the chain to wear the chain guide quicker...

    In my experience I found 17/44 was to long geared, that is the engine didn’t have the power to pull to redline in top gear...

    For just reducing revs at highway speeds it will be fine...

  5. #5
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    I run 17/42 on a RRV550, have to trim a millimeter off the OD of the sprocket and a little off the swing arm.
    The chain rubs quite hard on the guide that is on the bottom of the frame.
    11000rpm gives me 205 (on GPS.) Speedo stops at 207 lol

    Wayne
    in New Zealand

  6. #6
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    Quote Originally Posted by S4R View Post
    Yeah 17 fits, I tested one once...

    You while need to trim a little from the chain guide near the swing arm pivot and remove a little bit from the swing arm in the same area...

    A 40 on the rear main cause the chain to wear the chain guide quicker...

    In my experience I found 17/44 was to long geared, that is the engine didn’t have the power to pull to redline in top gear...

    For just reducing revs at highway speeds it will be fine...
    Alright sweet,

    So do you recommend sticking with the 42 rear and just slapping on the 17 front with the minor grinding work?

  7. #7
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    Yeah, I would put the 17 on and try 17/42...

  8. #8
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    Quote Originally Posted by vfr_nz View Post
    I run 17/42 on a RRV550, have to trim a millimeter off the OD of the sprocket and a little off the swing arm.
    The chain rubs quite hard on the guide that is on the bottom of the frame.
    11000rpm gives me 205 (on GPS.) Speedo stops at 207 lol

    Wayne
    in New Zealand
    Will it continue to pull past the 11,000rpm, or does it just run out of power?

  9. #9
    apriliaforum Member
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    Quote Originally Posted by S4R View Post
    Will it continue to pull past the 11,000rpm, or does it just run out of power?
    Yes it was still pulling but I ran out of track. A bit more corner speed coming onto the straight would help.
    Track is Taupo, New Zealand https://www.google.co.nz/url?sa=t&rc...oDB8AJecOX1s3v

  10. #10
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    I'm running 16/42 it's takes a long straight for it to get to redline. It also chews through upper chain guides like candy

  11. #11
    apriliaforum expert daws's Avatar
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    Quote Originally Posted by vfr_nz View Post
    Yes it was still pulling but I ran out of track. A bit more corner speed coming onto the straight would help.
    Track is Taupo, New Zealand https://www.google.co.nz/url?sa=t&rc...oDB8AJecOX1s3v
    Have you tried it at Manfeild? I found the 16t (and possibly a 42t) was ok on the 550 at Taupo but had no hope at Manfeild, the same gearing had me hitting the limiter before the start/finish line.


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