Marque Remarks > Yamaha
YZ, IT, TT rear axle dimensions
James P:
I'm trying to find out whether one of these rear axles will be of any use to me:
1W6-25381-00 - 1977-1980 IT250/400/425
2K8-25381-00 - 1978-1979 YZ250/400, 1979-1981 TT500
As far as I can tell, the two are practically identical, but the 1W6 axle has the pressed-in L-shaped "tag" so you only need one spanner to tighten or loosen the axle nut. If anyone has either of these types handy:
Is the shaft 17mm diameter?
What is the length of the shaft, including the thread (but not including the head)?
What is the length of the thread only?
What does the axle weigh?
Is the axle hollow?
If the dimensions suit my purpose, I'd be interested in buying one of these, so please let me know whether you have one available for sale!
Thanks & regards,
James
mick25:
Yes they are 17mm but not hollow the TT ones
The TT ones have two different types etc lengths I have them but i will have to measure them tomorrow.
I’ve done the same as you finding the right one , I found a couple of RM axles that were hollow and 17mm and were the right length etc and lighter but now I am second guessing this after one of my solid axles was hard to remove from the wheel checked it and it was bent and I brought this axle brand new .
LWC82PE:
I was certain that 78 YZ and TT500 axles were 17mm and hollow. Any 17mm and hollow RM axle would be from a full floater . Nothing twinshock suzuki is hollow all the way through.
mick25:
You are right Lwc , the TT ones are hollow only small hollow hole , the one I bent was a DR500 solid axle my mistake .
Yes the Rm ones I got from eBay were NOS ones with part numbers full floater .
James P:
Thanks for the info so far. I have briefly investigated 17mm axles from Full Floater RM models and found the following:
64711-14600 - 1984 RM250/500E
64711-14610 - 1985 RM250F
64711-00B00 - 1986 RM250G
As far as I can tell, earlier Full Floater models used 15mm axles, while later ones used 20mm axles.
My research has suggested that the 1984-86 RM250s had hollow axles, but I'm not 100% sure.
Mick; Can you confirm any of the above relating to RM axles?
Is there any consensus on whether the specified YZ, IT and/or TT axles are completely hollow?
Regards,
James
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