Chris' 1958 Stroker Motor

Chris had the Chinese (aftermarket) primary chain tensioner that tends to break off and bust the cases.  The (above left) heavy-duty oem type is correct.  It will be out-fitted with a new-old-stock shoe, and retainer.  Genuine Harley-Davidson parts.
H-D Part No. 39978-58 Primary Chain Shoe

6 comments:

  1. BradMonday, June 12, 2017

    I've seen (and been tempted by) a tensioner that uses a bearing supported toothed roller but I've heard that they are hard on chains as they run on the back side of the chain.

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  2. BradTuesday, June 13, 2017

    https://www.google.com/imgres?imgurl=http%3A%2F%2Fi23.photobucket.com%2Falbums%2Fb390%2FToolmaker94%2FSportster%2FDSC03398.jpg&imgrefurl=http%3A%2F%2Fxlforum.net%2Fvbportal%2Fforums%2Fshowthread.php%3Ft%3D510660&docid=lsbAIDrchb7ohM&tbnid=1hm82QHeW00xUM%3A&vet=10ahUKEwjFnI6Xj7rUAhXC4CYKHbvhCP8QMwgrKAgwCA..i&w=640&h=480&bih=617&biw=1315&q=ironhead%20primary%20chain%20tensioner%20racing&ved=0ahUKEwjFnI6Xj7rUAhXC4CYKHbvhCP8QMwgrKAgwCA&iact=mrc&uact=8

    Holy crap...All that for one picture? I guess on the internet one picture IS worth a thousand words.

    ReplyDelete
  3. NootTuesday, June 13, 2017

    I run the standard tensioner pictured on all engines. Less parts to fall off I suppose? They always work - don't run chain too tight, since the shoe will just wear off and you be back to square one again.

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  4. Mct496Wednesday, June 14, 2017

    Ever try rivets or button head bolts to hold the shoe to the tensioner works good especially on high output stuff

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  5. NootWednesday, June 14, 2017

    I just saw one like that recently, kinda on top toward the ends. Looks like a good idea. You sure don't want it coming apart.

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  6. Mct496Friday, June 16, 2017

    A shoe retainer bouncing around in the primary ain't cool I like the flat side primary chains too the shoe last longer compared to the figure 8 chain

    ReplyDelete

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