Return to puch E50 & ZA50 flywheel magneto woodruff key plus many more
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5 of 5 It guides your flywheel onto your shaft. Full stop Thursday, November 3, 2022
taco eater : Dan from Stratford, CT United States  
This key fits fine into the super stuffy race crank, where the original Puch key needs just a hair sanded off it to fit.

As others have said, lap your taper. This guy does not hold the flywheel in place against the crankshaft, all it does is make sure your flywheel is going on in the right direction.

If you hold your engine with crankshaft vertical, it can be tough to get the flywheel on without this thing falling out of its slot and needing to be fished out of the case from behind the stator. Make gravity be your third hand, orient the crankshaft horizontally and turn it so the key's slot is facing upwards. Place this key into place and bingo, your flywheel slides over without pushing the key out of slot.

Now DON'T FORGET TO TORQUE DOWN THAT FLYWHEEL NUT!

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5 of 5 Get two Saturday, November 27, 2021
taco eater : Moped Madman from Murrieta, CA Independent Kingdom of Treatland  
Never know what could happen, i installed one and stupidly didnt beat the flywheel on hard enough and it sheared the key in twain. Miraculously it didnt reck my new crank's keyway or the flywheel but it did cause me alot of suffering, get two and even if you dont need both its good to have an extra, and dont be afraid to beat your flywheel on like its the commie that shot your grandpa

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5 of 5 lap your damn taper and torque to spec Thursday, June 17, 2021
taco eater : Dan P from MN United States  
Flywheel woodruffs have one purpose: to help you line up the flywheel when installing it. The do NOT prevent the flywheel from spinning on the crank. That is what your lapped taper is for. If you are shearing these it means you do not have the flywheel properly seated on the crank. Lap your taper (YouTube it ffs) and torque to spec. Don't blame the woodruff for shearing, it was never intended to stop the flywheel in the first place!

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2 of 5 I sheared 2 of these. Saturday, September 5, 2020
taco eater : Matthew Mulligan from terryville, CT United States  
I wouldn’t trust them, definitely lap the taper if you run one.

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1 of 5 Shear Shear shear Tuesday, February 18, 2020
taco eater : Reed Hois from Downers Grove, IL United States  
I've probably bought 15 of these and they keep shearing. I have a CDI and I keep the flywheel on tight but i cant go more than 20 minutes without a problem :((

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1 of 5 meh Tuesday, November 22, 2016
taco eater : Dennis Reese from Concord, CA United States  
installed it to replace a questionable key.....lasted 10min of running in the garage. least i kept the old one.

edit treats : we have used hundreds of these at the shop with no problems ever. I would suggest checking out your flywheel and making sure it is not worn in the keyway.

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4 of 5 NOT FOR M56 Friday, October 21, 2016
taco eater : Mike from austin, TX United States  
Just a heads up. M56 uses smaller (2mm) key

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3 of 5 non rated woodruff key Thursday, April 14, 2016
taco eater : Steve Clark from Waynesboro, VA United States  
fits Mineralli 4720 CEV

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5 of 5 Woodruff Thursday, April 14, 2016
taco eater : Anonymous Person from GA  
Yup. Does what it does.

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