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R6 swingarm swap

This is a discussion on R6 swingarm swap within the ZR-7 Performance Upgrades forums, part of the Kawasaki ZR-7 category; At the bike shop I work at, I was talking to the pro and asked his opinion about an R6 swingarm swap, just to see ...

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  1. #31
    Site Elder NightViper19's Avatar
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    At the bike shop I work at, I was talking to the pro and asked his opinion about an R6 swingarm swap, just to see what he thought about it from his 22 years in the biz. When he asked why, I said that the R6 shock is an upgrade from my stock shock. Is there any other benefits?

    I see the swingarm moves the tire back, like an extension, but is there any other bennies? Are more links required?

    Im asking this because the pro at the shop walked away while I was talking, and came back with an R6 swingarm assembly in his hand, and a big ole smile. He seemed pretty interested in trying it, for whatever reason.

    So now Im really weighing my options...
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  2. #32
    Supreme Being Craig Jackman's Avatar
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    Quote Originally Posted by nightviper19 View Post
    At the bike shop I work at, I was talking to the pro and asked his opinion about an R6 swingarm swap, just to see what he thought about it from his 22 years in the biz. When he asked why, I said that the R6 shock is an upgrade from my stock shock. Is there any other benefits?

    I see the swingarm moves the tire back, like an extension, but is there any other bennies? Are more links required?

    Im asking this because the pro at the shop walked away while I was talking, and came back with an R6 swingarm assembly in his hand, and a big ole smile. He seemed pretty interested in trying it, for whatever reason.

    So now Im really weighing my options...
    The R6 swingarm would be aluminum, not steel like the ZR swingarm, so it's lighter. Obviously, if you move the rear wheel farther away from the countershaft on a longer swingarm you are going to need more links in the chain. Note that a longer swingarm will affect handling as well, so I wouldn't call it a benefit. As for the shock, if you just want to upgrade that there are a couple of choices for the ZR already, and a custom shock is probably going to be about less (at worst the same price) than an R6 singarm and shock (plus machining costs), depending on where you get the R6 stuff from.
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  3. #33
    Site Elder NightViper19's Avatar
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    Quote Originally Posted by Craig Jackman View Post
    The R6 swingarm would be aluminum, not steel like the ZR swingarm, so it's lighter. Obviously, if you move the rear wheel farther away from the countershaft on a longer swingarm you are going to need more links in the chain. Note that a longer swingarm will affect handling as well, so I wouldn't call it a benefit. As for the shock, if you just want to upgrade that there are a couple of choices for the ZR already, and a custom shock is probably going to be about less (at worst the same price) than an R6 singarm and shock (plus machining costs), depending on where you get the R6 stuff from.
    I couldnt telll exactly how much farther the swing arm put the rear tire. When the guys at ASK did work on my bike, they put the tire as far back as it would go, so I got a few links laying around. The swing arm extension would make the bike a bit less nimble in the corner, but better for straight line acceleration, correct?

    I think I will be getting the swing arm and shock very cheap (Hes had it in the attic for a while). I saw the general cutting and grinding rdannar did, but was it enough to render the swap irreversable?
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  5. #34
    Up-And Comer DEcosse's Avatar
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    If you plan to do this, please use a little more exacting fitment than the OP
    No disrespect intended but when I see comments like 'grinding to fit' and 'grind 1/2" off the R6 to make it fit' that suggests all of this was just eyeballed and adjusted on a bench grinder to accommodate any differences in fit.
    I don't see any specific measurements that show the relationship of either the wheel to centerline or chainline (although since using the same wheel, one would follow the other)

    If any material needs to be removed for fitment, please have it done in a mill and understand the affect on alignment to centerline.

    And please find a real dogbone as opposed to a piece of bent flat steel and make accommodation for a proper top mount.

    I can understand the appeal to do this - there's nothing wrong with that if even for purely aesthetic reasons.
    I think there are probably better candidates out there, one that more closely matches the OEM swing-arm length would be better. But then again, you do have access to the R6 one at hand I suppose.
    Just do it with a little more precision is all I'm saying.

  6. #35
    Site Elder NightViper19's Avatar
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    Quote Originally Posted by DEcosse View Post
    If you plan to do this, please use a little more exacting fitment than the OP
    No disrespect intended

    I think there are probably better candidates out there, one that more closely matches the OEM swing-arm length would be better. But then again, you do have access to the R6 one at hand I suppose.
    Just do it with a little more precision is all I'm saying.
    Wise words sir. I was looking into a 636 swing arm because I saw a thread that tried that, and it seemed much easier than an R6. But as we both said, I seem to have an R6 one at hand.

    Dont fret, though. If I actually decide to do this, Me and the bike shop veteran (Who is infinitely smarter than me in every way with bikes), will be meticulously taking measurements and doing plenty of R&D before any actual labor. After the measurements, the pro was gonna calculate if it is going to be worth all the extra work to make it fit, or if a fitment of the R6 shock will be easier with desired results.

    And, upon choosing to go through with this, I will be posting up all the measurements and exact amounts of what needs to be done, what all the reciprocations are, and what I like/dislike about the whole thing, so that others will have a better feel of whether they should do it, and have more precise measurements of what to do, should they decide to do it. But this is still in an IF territory. Next time Im at the shop (And we arent swamped), I'll get all the measurements possible and try to come up with a conclusion.

    Again, no disrespect intended from either of us. And sorry for the
    2001 ZR-7S - too many mods for the signature to handle, apparently.

    Reverse Trike - Built from scratch

    DIY Mods for your ZR

  7. #36
    Supreme Being Craig Jackman's Avatar
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    You know, that's the way to go into this. Make your measurments first. Do all the math, then decide if it's going to be worth the effort to go into it. Hey, machining my pegs was easy, and would have been faster if the guy doing it spent more time on the shop floor and less in his office. If your guy knows what he's doing, it should go very smoothly. As for the swap, the 636 swingarm and shock would be the better and easier choice. It might just bolt right in. Whatever you choose to do, heed the advice to match tire and chain centerline.

    If you are just looking for a better shock, as I said, there are easier ways to do this. Also, noted from another post, if you do put on a 636 or R6 swingarm, yes there will be enough room for a 180 rear tire. But, and it's a big BUT, the stock ZR7 rim is too narrow for a 180 tire (the profile won't be correct). So factor in a 636 or R6 wheel too if you want the big tire.
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  8. #37
    Newbie MadMikeX3's Avatar
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    Re host the pictures?

  9. #38
    Supreme Being shakennstirred's Avatar
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    its an old thread mate
    6 years since the last post
    The light at the end of the tunnel has been turned off until further notice
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  10. #39
    Up-And Comer makenzie71's Avatar
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    Is OP still around? Were some measurements taken and posted and I missed them? Anyone know what the pivot bolt diameter is? Was it the same as the R6? I'm looking at either doing the same swap, or a K5 GSXR600 swingarm (specifically to get a 5.5"/180mm combo). How much longer is this swingarm than stock? I haven't actually measured yet (I have to dig my swingarms out of spare parts bins), but it looks as though the R6 arm is actually a little shorter.

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