Quote from: philward on March 02, 2014, 08:19:01 PM
I had the same problem but after checking under different lights, I saw the marks on the crank - really looked like a 2 year olds writing, almost a scribble! Having a real look might save you a some work with the plastiguage - took me ages to spot the marks on my crank
Phil
+1 those marks are hard to read and you need the right light level as there is very little contrast between the marks and the crank. They look like they were done with a wax crayon or lipstick!! obviously not, must be some kind of special marker pen the Japanese had. I have convinced myself in the past that they had worn off but after a mug of tea and a re-examination they have always been there!
Link to Service bulletin #14 is useful (prices for the shells are a bit out of date though
).
The diagram in the bulletin shows them as neat markings but the ones I have seen are hand done and the 'font' if you can call it that, is freehand.
http://manuals.sohc4.net/CB750SB/750_14.pdfCheers..... AshD