3AJ/1VJ Crank Swap?
Although I am not certain, I 'think' my 3AJ crank small end is steadily wearing out. I have had this bike a very long time and it is running a Wiseco 640 piston and a mild tune (about 48-50 bhp). Prior to the last rebuild (about 25k miles back) the small end became oval. I only discovered it when I stripped the bike to prep for a Sahara trip, and found the wear by accident. The only audible sound was a slight rattle on the over-run when revved.
The bike is now starting to make a similar noise, and so I am fearing the worst. As such, I am scouring the Bay of Thieves for a crank and only seem to be finding 1VJ cranks coming up. Does anyone know if the 1VJ crank can be fitted to the later 3AJ motor?
Finally, if anyone knows a way of checking small end wear without stripping the motor, then I would sleep a lot better knowing this gradually developing rattle is 'normal' XT600 wear or indeed the return of the old crank small end wear. I have looked at the forums and have not spotted any other reports of small end wear issues on 3AJ's, so perhaps it is the old paranoia associated with riding big air cooled singles that tend to sound different every day depending on atmospherics etc.
Craig
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