Rear Sprocket options
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  1. #1
    Member aladdin's Avatar
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    Are all the after market rear sprockets thinner where the bolts go thru. [counter bored at the center] I want to try a 54 or 55 tooth. It looks like Yamaha only offers the 50 tooth.

  2. #2
    Senior Member Point37's Avatar
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    not sure if all of them are but JT sprockets are like that...

    https://tw200forum.com/index.php?/top...__1#entry64562

  3. #3
    Senior Member admiral's Avatar
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    I recently purchased a Sunstar 55T from Procycle and it did not have the recessed area similar to the JT sprockets. The bolt area is the full thickness as the rest of the sprocket.
    Hidden Content A ride in the woods helps me relax and release tension. The fact I'm dragging a body should be entirely irrelevant?

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  5. #4
    Member aladdin's Avatar
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    Quote Originally Posted by admiral View Post
    I recently purchased a Sunstar 55T from Procycle and it did not have the recessed area similar to the JT sprockets. The bolt area is the full thickness as the rest of the sprocket.


    Now that is interesting. When I got the bike it had a 47 tooth Sunstar and it was recessed.

  6. #5
    Senior Member lizrdbrth's Avatar
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    Quote Originally Posted by aladdin View Post
    Are all the after market rear sprockets thinner where the bolts go thru. [counter bored at the center] I want to try a 54 or 55 tooth. It looks like Yamaha only offers the 50 tooth.


    Just curious. What's your objection to the recess?



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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  7. #6
    Senior Member xdac's Avatar
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    Quote Originally Posted by lizrdbrth View Post
    Just curious. What's your objection to the recess?
    FURGETDABOUTIT
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  8. #7
    Senior Member lizrdbrth's Avatar
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    Chuddup, you!



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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  9. #8
    Member aladdin's Avatar
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    Quote Originally Posted by lizrdbrth View Post
    Just curious. What's your objection to the recess?


    If there is a non recessed option available it would be my first choice. yes I have been called anal more than once.

  10. #9
    Senior Member lizrdbrth's Avatar
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    If we were running a 428-width sprocket with three times the horsepower I'd share your concern. The recessed versions were designed to reduce weight in steel sprockets without cmpromising strength. There is no real advantage to full-width steel sprockets. The old wive's tale applies to aluminum sprockets, which used to warp or break out their center sections if they were thinned in that area.



    I hope that eases your mind and opens up more options.



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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