TS125 head nuts torque

[spooky]

What should the cylinder head nuts be torqued down to ?

[dave47]

According to the mz manual, 1.8Kg m (13lb ft).
The Haynes manual says 30lb ft but is certainly wrong!

[spooky]

thanks, haven`t got a manual yet, only had the bike 5 years....

[DAVID THOMPSON]

Haynes little book of fibs and lies bites again the one for my Nissan truck went in the trash
when i sold it

[Gerryman Ts125]

It's 20fp (only four 10mm nuts and washers, but clean their mounting surface with something to remove all deposits) if I remember Of course it is Run it for two periods of twenty minutes (with a 15 minute cool down time between) on quarter throttle (about 2000 Rpm if you have a working counter fitted) Then let it cool down for one hour (unless its drivable) Or 150 miles (approximately 240 Kilometers)then retorque.


P. S. And I have a well thumbed version of a Billy Haynes manual. For the Mz Ts 125-150.

[Puffs]

Following a biased and flawed moderator choice (someone posting aggressive personal attacks is rewarded, while my technical posts are removed - behind my back & without any justification!), I have withdrawn from this forum.

[Gerryman Ts125]

To avoid translation issues I had a look in the 'original' TS125 manual on Miraculis:

TS125 Zylinderdeckel.jpg

and in the English manual MZ published:

TS125 Head.jpg

Now 1,8 kpm = 1.8 kgm = 17.7 Nm = 13.0 ftlbs.


Finally, always torque head nuts cold. These long studs are made of a steel alloy, which has (or may have) a different thermal expansion coefficient as the alu from the barrel & head, which is likely to expand more. The studs are elastic, but the tension in them increases with temperature.

Its like getting a quote for most things, get more than one (viewpoint) quote. Or read a `how to do it` book on them.

[Puffs]

Following a biased and flawed moderator choice (someone posting aggressive personal attacks is rewarded, while my technical posts are removed - behind my back & without any justification!), I have withdrawn from this forum.