General Category => Engine & Transmission => Topic started by: Ricks on October 09, 2016, 01:44:40 PM
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As many of us have experienced, many of the Wico flywheels have had the pinion gear stud holes stripped. I recently bough a bike that had the pinion gear holes drilled and tapped to 5/16, using bolts and not straight. There were no cracks in the keyway, so a full center replacement like Wayne performs was not necessary. I have used the EZ-Lok inserts before with excellent results, so I decided to do it again. I drilled out the holes to 5/16" on a drill press and tapped them to 3/8-16. I then installed the inserts, which come with thread locker already on them. I feel that this type of repair should last almost forever.
PS: I know the package says to use a Q drill, but I like the slightly smaller 5/16" drill in the soft Zinc flywheel.
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Looks like that'll work , Rick .
I've read some good reports about EZ-LOKs .
Pete . :)
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Those are nice because they only require a normal tap to thread the hole with. (unlike the Heli-coil set-up) There is also another brand called a "keen-sert". Which are the same but small pins attached vertically that are driven down between the treads to lock into place. A home run either way!
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Keensert :
(http://cdn.mscdirect.com/global/images/ProductImages/3547532-23.jpg)
Personally , I have only used Helicoils and have had good luck with them .
Pete . :)
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Thanks for the picture PD! I have never seen those before. You machinists know about all the cool stuff out there!
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if you ever try these make sure you get the small driver with them. It is about 3/16" in diameter and has a small dimple in one end to stay centered over the pin. Then you can drive straight down on the pin. If you use just a hammer you will bend the pin every time.
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Thanks for sharing those products. Learn something new everyday (try to at least) Both those are great options for those "oh crap" situations vs the Helicoil. Is there a preferred vendor for them like Enco?