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Automatic tensioner mounting bolts

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  • Automatic tensioner mounting bolts

    Busy swapping over to a V-Max automatic tensioner on my '79SF. Probably a stupid question but is it OK to use the old mounting bolts or do I need to get V-Max mounting bolts? Are they different? Am I just over thinking it?

  • #2
    Original bolts are 25mm long, you will need 20mm long for the VMax tensioner. Or worst case, use a stack of washers on the old bolts.

    Make sure your bike is on the center stand, not the side stand when removing the old tensioner, otherwise the chain could possibly slip off the crankshaft.
    Last edited by bikerphil; 10-10-2023, 06:16 AM.
    2H7 (79)
    3H3

    "If it ain't broke, modify it"

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    • #3
      Thank you. I don't have original bolts with the tensioner I bought and the old ones have felt too long. I didn't want to risk over-tightening them. Now I know why!

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      • #4
        I did this mod this past summer.
        1980 XS1100 SG
        Inline fuel filters
        New wires in old coils-outer spark plugs
        160 mph speedometer mod
        Kerker Exhaust
        xschop K & N air filter setup
        Dynojet Recalibration kit
        1999 Kawasaki ZRX1100
        1997 Jeep Cherokee 4.5"lift installed

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        • #5
          You can buy the correct size bolts at a hardware store or order them from boltdepot.com
          -Mike
          _________
          '79 XS1100SF 20k miles
          '80 XS1100SG 44k miles
          '81 XS1100H Venturer 35k miles
          '79 XS750SF 17k miles
          '85 Honda V65 Magna ~7k miles
          '84 Honda V65 Magna 48k miles (parts bike)
          '86 Yamaha VMAX 9k miles

          Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65

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          • #6
            If you have a dremel or grinder with a cutoff disc you can cut your original bolts down to the right size. Just run them in with the automatic tensioner, mark them for excess and cut that amount off.
            2 - 80 LGs bought one new
            81 LH
            02 FXSTB Nighttrain
            22 FLTRK Road Glide Limited
            Jim

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