Nichols flywheel question

[Karlr]

Do I need special nichols lock nuts? for this?

[dirkwrong]

Originally Posted by Karlr

Do I need special nichols lock nuts? for this?

I reused the oem nut with red locktite on my bike.

[Karlr]

Originally Posted by dirkwright

I reused the oem nut with red locktite on my bike.

Thanks

it hasn't fallen off yet then?

[cassos]

Nichols installed mine, and per their recomendation, they installed the special nichols lock nuts, it is not expensive, but much safer than the OEM one.

[Karlr]

Originally Posted by cassos

Nichols installed mine, and per their recomendation, they installed the special nichols lock nuts, it is not expensive, but much safer than the OEM one.

ahh perhaps I should send for some

[dirkwrong]

Originally Posted by cassos

Nichols installed mine, and per their recomendation, they installed the special nichols lock nuts, it is not expensive, but much safer than the OEM one.

It depends on the year of the motor, I think. Later motors are ok. I have the two locknuts if anyone wants to buy them. Considering the fact that it took a lot of heat from a torch and an impact gun to get the oem nut off, I think I'm pretty good using it again.

[Karlr]

Originally Posted by dirkwright

It depends on the year of the motor, I think. Later motors are ok. I have the two locknuts if anyone wants to buy them. Considering the fact that it took a lot of heat from a torch and an impact gun to get the oem nut off, I think I'm pretty good using it again.

why are later motors ok? Mine's an 07..

[Shazaam]

In the early ‘90’s Ducati used two jam nuts to secure the flywheel, but replaced this design with a single very-fine-thread flange nut that carried with it an extremely high torque requirement.

There’s two parts to this issue.

First, the factory installed defective nuts on some 1999 and 2000 model year bikes before the loosening problem was caught. These nuts came loose even when installed with the correct torque because the treads were oversized. If you have one of these bikes, you should have it checked. If the nut spins on/off easily it should be replaced, not just re-torqued.

Second, the flywheel retaining nut design needs to be tightened to a very high torque level to keep it from loosening. It’s the highest-torqued fastener on the bike.

Except for these two model years, you’ll not get a loosening problem unless you’ve removed the nut for some reason. When you go to reinstall it you’ll find that without the proper tools it’s VERY difficult to immobilize the crank (which is necessary to reach the high torque) and many shops/owners don’t understand how critical this is. The use of this kind of nut in this particular application is on the envelope of fastener design.

So I’m not offering any advice here as to how to do it. See one procedure here:

http://www.mad-ducati.com/Technical/...torCover2.html

Alternatively, some owners have decided to replace the single Ducati nut with the two jam nut design offered by Nichols.

http://www.nicholsmfg.com/

A couple adventurous owners have tried Nord-Lock washers with the stock nut.

http://www.nord-lock.com/default.asp?id=3&language=4 **

The point I’m trying to make is that if you don’t have a 1999 or 2000 MY bike. and you haven’t touched the flywheel nut, don’t worry about it coming loose.

[stryder]

^ ^ IIRC, Ducati also use red lock tight on that high torque spec flywheel retaining nut, and it's recommended to heat it up before loosening it to avoid damaging the crank threads.

[Karlr]

Originally Posted by Shazaam

In the early ‘90’s Ducati used two jam nuts to secure the flywheel, but replaced this design with a single very-fine-thread flange nut that carried with it an extremely high torque requirement.

There’s two parts to this issue.

First, the factory installed defective nuts on some 1999 and 2000 model year bikes before the loosening problem was caught. These nuts came loose even when installed with the correct torque because the treads were oversized. If you have one of these bikes, you should have it checked. If the nut spins on/off easily it should be replaced, not just re-torqued.

Second, the flywheel retaining nut design needs to be tightened to a very high torque level to keep it from loosening. It’s the highest-torqued fastener on the bike.

Except for these two model years, you’ll not get a loosening problem unless you’ve removed the nut for some reason. When you go to reinstall it you’ll find that without the proper tools it’s VERY difficult to immobilize the crank (which is necessary to reach the high torque) and many shops/owners don’t understand how critical this is. The use of this kind of nut in this particular application is on the envelope of fastener design.

So I’m not offering any advice here as to how to do it. See one procedure here:

http://www.mad-ducati.com/Technical/...torCover2.html

Alternatively, some owners have decided to replace the single Ducati nut with the two jam nut design offered by Nichols.

http://www.nicholsmfg.com/

A couple adventurous owners have tried Nord-Lock washers with the stock nut.

http://www.nord-lock.com/default.asp?id=3&language=4 **

The point I’m trying to make is that if you don’t have a 1999 or 2000 MY bike. and you haven’t touched the flywheel nut, don’t worry about it coming loose.

My local Ducati shop are going to do it. Although they have already said that if anything goes wrong they won't be to blame cos it's not a DP part. I'm sure they'll put it on right.