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Head Nut Tension (Read 3906 times)
Ash
Ex Member



Head Nut Tension
17.03.06 at 05:25:09
 
I presume many of you have replaced your head gaskets on your TR1 … I have just done this on my TR1 for the first time.
However, I am having difficulty establishing the correct tension for the head nuts – and the local Yamaha dealers say its too old for their books.  
Is the final head nut tension 64nm/46 lbs or only 50nm/35lbs?  If I pull them down to 35lbs the head doesn’t meet the barrel – so I have pulled them down further to the full 46lbs and everything meets up (apparently the fire ring head gasket was not being crushed sufficiently with 35lbs).
Is this correct and normal?
Ashley

 
 
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Manfred
TR1 Board Administrator
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Take it easy!

Posts: 419
Gender: male

Bike: Yamaha TR1 '81 (bought September 1984 as new)
Re: Head Nut Tension
Reply #1 - 17.03.06 at 08:30:58
 
Did you check the TechInfo at this site? And there the Service Manuals?
In special this page? That should help!

Smiley
Cheers
Manfred

 
 

Don't ask me anything technical about the TR1!
I'm the computer guy, not the mechanic!
CoolCoolCool
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Ash
Ex Member



Re: Head Nut Tension
Reply #2 - 17.03.06 at 09:05:59
 
hi Manfred
Yes I did check that site - which is where I got the two different head nut tensions from - but I'm a bit nervous pulling a bike head down to 46lbs (64 nm). is that the correct tension?
Ash

 
 
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Sepp
TR1 Board Extraterrestrial Member
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TRi onli !!!

Posts: 1570
Gender: male

Bike: Jede Menge TRi's
Re: Head Nut Tension
Reply #3 - 17.03.06 at 12:21:53
 
Hi Ash, the most important is, that head and cylinder are on block.
If you need 70 or 75 is not a problem. Greetings Sepp

 
 

Racing is the answer, but I don't remember the question!
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