Overtorquers Be Damned

I bought a nice F-500 bike (RD-400) racebike last year which bent a rod early last year. Found a cheap source for a new (yes in the package) crank so decided to rebuild the motor. Every friggin bolt/nut was over-torqued. Had to destroy the clutch basket to loosen the clutch nut, as my genuine Yamaha clutch removal tool actually broke. The other big bolts/nuts were a bear to loosen.

When you are rebuilding, use a torque wrench please!!!

 

Torque it down till it strips, then back it off a half turn!!

 

I always torque it down as tight as I can get it,then I give it two more turns.
Tom

 

So that's why I had to replace so many nuts and bolts when I bought the RZ from you Mark!

 

Too bad I forgot to install the remote-kill switch. Looks like it could come in handy.

 

Kill switch is too obvious. Remote YPVS closer is what you want.

 

I bought a TZ motor and couldn't get the plugs out of it believe it or not - I used a torque wrench in the end to get them OUT, because I just had to know how tight they were.

80 POUNDS OF TORQUE ON THEM! zoinks.

cjs

 

Yamaha uses good aluminum, I guess. But, could a nut be torqued at say 20 lbs. and then with aluminum to steel corrosion require 40 lbs. to untorque?

 

Well, they'd only been in there three months...

 

I think that it should be a felony for some people to possess an impact wrench!!!

Gordon

 

Don't forget the Gorillas and the guys with Bear paws.
They just don't know their own strength.

 

If you're talking about the RD I sold you. A torque wrench was used.

 

Did you ever pull the crank out, i.e. the drive gear or the clutch housing?

 

yep. Its hard to remember all the details on that motor seeing as how it was 2 years ago that it was rebuilt, and also the fact that I've built 2 more race bikes since that one, but I always use a torque wrench.

 

big difference between . .inch(s) torq and lb(s) torq.
( most people don't use the inch torq .. . all they have
is a ft. lb torq wrench.)

 

That might explain the shifter! Sorry Tom I just couldn't resist one small jab.