is there any easy way ti visually tell the two apart??
cheers
KR1-S & KR1 Swingarms
- SHimmer45
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KR1-S & KR1 Swingarms

94 GPz500S
KR1-S Project
KR1 donor
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- Premix Junkie
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- SHimmer45
- Premix Junkie
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- Premix Junkie
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- Premix Junkie
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- Premix Junkie
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also the 1s swingarm is nicer looking, more heavily braced and has a larger swingarm pivot diameter. either machining the kr1 frame or sleeving down the 1s swingarm pivot will allow fitment easily. apart from that and the little spacer in the caliper hanger been a little thicker (i think) there almost a straight swap. the 1s swinger looks good when polished. my kr1 based bike uses a 1s swingarm and was acheived by machining the swingarm pivot on the kr1 frame. i think? its kr1 (17mm) and kr1s is (20mm) but im not 100% sure.