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  1. #1

    Join Date
    Jul 2018
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    24

    Default 1986 Sporty Frame/Engine Compatibility

    I have an 86 Sporty that I sold the 1100/4 speed drivetrain from. I picked up an engine & trans out of a 1997 Sporty. Will I have any issues fitting this into the 86 frame? I've heard there can be issues with the kickstand mount but I've also heard it will go right in with no issue.

    Anyone put a newer engine into an 86 Sportster?

  2. #2
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    Would be an excellent question for xlforum.com if you don't get a clear answer here. I would think they would work but someone might have better info for you.

  3. #3

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    Thanks for the suggestion, just made an account on there.

    It's a really oddly-specific predicament, I guess there's not many 86s running around or people just keep the original drivetrain.

  4. #4
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    What makes a 1986 so special???????? I know a 1979 Sporty is an odd ball..............

  5. #5
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    The sidestand mount is the difference. I have a titled '80s frame I bought to use a superior later engine with alternator on crankshaft I got too cheap to resist. (Didn't build that one yet.)

    Here's instructions with clear pics. The aftermarket mount it much slimmer than stock. After that you could use either motor.

    https://www.baggersmag.com/sportster...tein-i-presume

    You can also run the classic (but large) "jiffy" style stand if you drill a three hole mount pad then weld that to the frame which is what I'll likely do since it's just as much work and I don't really like stock Sporty stands.

    Either way it's easy work. Use a proper welder, not a 120V wire shitbox, for this job. If needed you can tack it in place with a cheap welder then bring the frame to a pro. They'll be done in minutes.

    xlforum will confirm. I checked there too. It's by far the best Sportster site.
    Last edited by farmall; 11-25-2019 at 8:31 PM.

  6. #6

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    Jul 2018
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    Yep, that's what I was looking for. Thank you.

    I have a grinder to cut it off but next to no welding experience. I live in Phoenix a couple of miles away from Haifley, I wonder if they still work on bikes even though they stopped selling their chopper products...

  7. #7
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    All ya need is to take it to a competent welder since the job is easy. Need not be a bike expert. You can slice the old mount off with a zip disk then smooth with a 60 or 80 grit flap disc which will also clean off the new location.

    Since you have a welder, grab that bitch and some clean steel and lay beads (at least 6" long) to build muscle memory. Welding is all about practice. MANY hours of practice so don't be afraid of putting in work. The Weldingweb forums are to welding what this place is to chopping. Then weld some practice joints. Then cut them through with a cutting disk so you know if you succeeded.

    You can tack weld your new mount with a couple of tacks to position it, then a pro welder can finish the job and grind off your tacks in the process.
    Last edited by farmall; 11-27-2019 at 4:06 PM.

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