Top end swap on GS550 exhaust question

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  • bigP
    • Jan 2026

    #1

    Top end swap on GS550 exhaust question

    Hey everyone,
    I?m partially through a top end swap on my 1980 gs550. The stock top end is off, I?ve rebuilt the 650 top end, and now I?m just waiting on piston rings before I hone and instal the 650 cylinder.

    My question is; if I buy the MAC 4-1 GS650 exhaust, will I have any mounting issues since it?s still a GS550 frame? The ports will fit of course, but will I have any problems bumping into the frame/crankcase/footpegs etc.?

    Thanks,

    Peter
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