Truss rod allen key

[four/five]

Not sure whether post here or in "tecnical".

Whats the truss rod allen key size on bb425, i e tried a couple of 5mm but they appear a tad too big. An old imperial 5/16" works but its loose fit.

Surely Yamaha would not have their own size ?

As far as im aware its the original rod ie: two way adjustment.

Thanks in advance.

Edited January 31, 2022 by four/five

[mcnach]

I don't think it'll be Imperial for Japanese instruments, so it's likely a 4mm key if the 5mm is too big.

[Machines]

2 minutes ago, mcnach said:

I don't think it'll be Imperial for Japanese instruments, so it's likely a 4mm key if the 5mm is too big.

 

There's been no Imperialism in Japan since 1945.

 

And checked my BB415 just, 4mm is correct.

[four/five]

4 minutes ago, Machines said:

 

There's been no Imperialism in Japan since 1945.

 

And checked my BB415 just, 4mm is correct.

Thanks for reply, now where's my 4mm gone?

[Machines]

1 minute ago, four/five said:

Thanks for reply, now where's my 4mm gone?

 

I use this Ibanez multitool for nearly every bit of work I do on mine. The truss rod/allen keys have fit everything i've had in the last few years apart from US made stuff.

 

https://www.amazon.co.uk/Ibanez-MTZ11-Multi-Tool-for-Guitar/dp/B00F4SDYNS/ref=sr_1_2?crid=1EJWW1J0KK810&keywords=ibanez%2Bguitar%2Btool&qid=1643648967&sprefix=ibanez%2Bguitar%2Btool%2Caps%2C65&sr=8-2&th=1

[Downunderwonder]

5/16 is knocking on 8mm so maybe you had a 3/16??

[four/five]

You’re right 3/16.

Now things go from bad to worse. On putting new strings identical to the original D’Addario’s , the nut has broken on the B side. Perhaps a difference in diameter of nickel and steel, seems odd. New nut or glue.

[Machines]

46 minutes ago, four/five said:

You’re right 3/16.

Now things go from bad to worse. On putting new strings identical to the original D’Addario’s , the nut has broken on the B side. Perhaps a difference in diameter of nickel and steel, seems odd. New nut or glue.

 

I had this happen recently, the G side pinged off but managed to find it. Superglue and 30 mins it was fine