rotor loosening

[downtheshed]

Hi Guys,

 I've changed the genny rotor on my  katana for a newer gsxr one,  to allow a chamfered casing, but the rotor locking nut  is not staying torqued allowing the starter clutch to slip I think, any ideas??

It's doing my head in now , 

Edited August 26, 2020 by downtheshed

[mark35gun]

I use loctite high strength retainer, bit of c##t to get undone again though

[Fazz711]

Try some engineers blue to see how good the fit is. 

If not good then some lapping paste can help. 

Or go for the lock tight route 

[Gixer1460]

Are the tapers actually compatible? Even a slight difference won't get the friction fit required.

[mark35gun]

probably not, hence the loctite, you might have some success with lapping paste if they are not too far out from each other, the loctite works though, but be aware once cured it won't be easy to get apart again.

[wraith]

Never seen a oil cooled rotor/starter clutch on a air cooled motor, what you doing about the charging system? 

Or is it the much latter water cooled ?

Interesting thinking doing that 

Edited August 26, 2020 by wraith

[Gixer1460]

1 hour ago, wraith said:

Never seen a oil cooled rotor/starter clutch on a air cooled motor, what you doing about the charging system? 

Or is it the much latter water cooled ?

Interesting thinking doing that 

I think Arttu did a w/c rotor onto a EFE taper as a charging output upgrade - documented hereabouts?

I did first think oil cooler GSXR but as they don't have rotors I told myself to stop being so dumb LOL!

[wraith]

22 minutes ago, Gixer1460 said:

I think Arttu did a w/c rotor onto a EFE taper as a charging output upgrade - documented hereabouts?

I did first think oil cooler GSXR but as they don't have rotors I told myself to stop being so dumb LOL!

Have to try and find that sounds interesting. 

Yes I was the same thinking oil cooled then the brain kicked in 

[Arttu]

3 hours ago, Gixer1460 said:

I think Arttu did a w/c rotor onto a EFE taper as a charging output upgrade - documented hereabouts?

Almost correct, a GSX1400 rotor on EFE and other large taper cranks. More info in my project thread:

@Gammaboyand @coombehousehave documented nicely how to fit a GSX-R600 (K6) rotor on small taper GSX cranks:

 

[downtheshed]

The mod came from Paul Berryman and the Spakat,  gsxr  flywheel and stator 600/750 2007 onwards  ,  thread also on this  site et -flywheel  alternatives.

I'm doing this as it was total loss ignition which is a pain I found .

 

Edited August 26, 2020 by downtheshed

[coombehouse]

4 hours ago, downtheshed said:

The mod came from Paul Berryman and the Spakat,  gsxr  flywheel and stator 600/750 2007 onwards  ,  thread also on this  site et -flywheel  alternatives.

I'm doing this as it was total loss ignition which is a pain I found .

 

The gsxr k6 rotor taper is exactly the same as the et taper. It is however slightly shorter so you will need to make a washer to go under the nut or it will not tighten up properly. I fitted mine again just yesterday during yet another rebuild. I used a 4mm thick washer. 

[downtheshed]

What  torque are you using for the nut,  efe motor , but i don't  have a manual for this engine, and the katana has 2 different torques  100 or 120 lb ft ?

[Arttu]

18 hours ago, downtheshed said:

What  torque are you using for the nut,  efe motor , but i don't  have a manual for this engine, and the katana has 2 different torques  100 or 120 lb ft ?

The EF service manual says 160-170Nm. I have had problems to hold the rotor for that torque, especially with the GSX1400 rotor that doesn't have provisions for holder tool. So I have just tightened it with a wrench as far as I can and then "some more" with a rattle gun.

[Reinhoud]

Didn't read any replies, are the tapers the same?

Loctite and 125Nm, if I'm correct

If you want to tighten the nut/bolt properly you have to block the crank somehow, never trust an air ratchet to give the wanted torque

[Gixer1460]

Never heard of anyone over tightening by manual means so as long as the rattle gun isn't rated at 400+Nm (mine is about 200ftlbs) so just give it FT torque! Have also used carborundum / diamond dust paste on tapers which locks them brilliantly.