Woodruff key size

kevcboy · Post by **kevcboy** » Sat Jan 06, 2007 12:33 pm

I am rebuilding the motor in a 1973 400 with the KEC-340 engine and i cannot find a flywheel woodruff key that works, does anyone know the actual dimensions of it or does someone have an extra?

sporty440 · Post by **sporty440** » Sat Jan 06, 2007 3:06 pm

I wasnt able to match it up either so I bought an oversized one and ground it down on the bench grinder till it fit perfectly. took about an hour. you gotta keep taking a hair at a time off and then going to see the fit. then back to the bench grinder and so on. worked fine though.

sporty440 · Post by **sporty440** » Sat Jan 06, 2007 3:08 pm

you know I just remembered. before I installed it in the sled I remember thinking I should trace the key out on a piece of paper and keep it in my manual. I am sure I still have it. If you think it will help I will dig out the paper and measure it up with my digital micrometer and send you the dimensions. The reason I traced it was so I could have the outline right there on the workbench and not have to keep running outside to the sled as I was grinding the next key out.

harleysportster · Post by **harleysportster** » Sat Jan 06, 2007 3:13 pm

Rememeber that the engine is metric. You should be able to find metric keys . If you have a slide caliper, measure the width and depth and you should be able to find one.

Rodimus Prime · Post by **Rodimus Prime** » Sat Jan 06, 2007 4:36 pm

they are available at snowmobile shops as the same key is used in many other sleds.

kevcboy · Post by **kevcboy** » Sat Jan 06, 2007 5:36 pm

the engine is metric but they didnt not start making metric woodruff keys and other certain things till the mid eighties so its some odd ball sae size. at least this is what i have found talking to machinists here locally.