rotor nut thread size [Archive]

View Full Version : rotor nut thread size

07-05-2003, 09:46 PM

I've tried coarse and fine threads but I cannot find one that will fit on the end of my crankshaft on my 185s. Now I'm really upset that I lost the old one. Could someone please tell me the thread size. tell me if its a .10 or something. I think there is only 3 sizes.

07-06-2003, 03:39 PM

Anyone? :?

J.D.

07-06-2003, 04:05 PM

If it's anywhere close to the one on my Z, it's somewhere around a 14 MM nut. Are you using metric nuts to try and find it?

Dirtcrasher

07-07-2003, 12:18 PM

Metric can be tough because they can change the pitch on any diameter not just course or fine. And forget what size socket fits on the nut - that doesn't help at all. Just remember 11mm is about 7/16 and 13mm-1/2, and 17mm - 11/16 and 19mm about 3/4 of an inch JUST FOR REFERENCE. Obviously the best way is to use a pai of vernier calipers (20$) to mease the diameter with. Then you need a known thread pitch like 6mm x 1.0 or 8mm x 1.25 then 10mm gets funky 1.0,1.25,1.5,1.75 all pitches I've seen. Again the proper tool is a thread gauge but .80 pitch whether its on a 5mm bolt or a 20mm bolt is still the same pitch. Hope that helps!

07-07-2003, 08:24 PM

The diameter is 12mm, now I need to find the pitch. I've tried three different sizes but haven't found the right one yet. The threads on the crankshaft are in good shape, so I just have to find the right nut.

jeswinehart

07-07-2003, 09:44 PM

dc,,, are you talking about the clutch side,,, the nut that takes a speacil kind of 4 pronged socket to get off ???

john

jeswinehart

07-07-2003, 10:16 PM

okay, i got it figured out what your talking about ( i think).

nobody has item #12 to send this fella ??? i checked and i don"t.
it is in the machines listed w/pic.

07-08-2003, 09:31 PM

Thanks for all your help guys, but I got bad news. The reason I couldn't get the nut on was because the threads on the crankshaft were mushroomed. :x

I was able to grind and file down the threads on the end and force the nut on. I didn't like doing it though. If I would have ruined the threads on the crankshaft it would have been bad news.

The threads must have been mushroomed when I took the rotor off. It was stuck on there incredibly tight.