what is the left hand thread size of an echo cs400 crankshaft for the clutch side

[now151]

hi to everyone. i have had the hardest time trying to find the size left hand threads on my cs400 crankshaft clutch side. i want to buy a tap but i don't know the size to buy. even on the clutch it doesn't tell the bore size, just the model that it goes on. any idea where to find such information? thanks for any help.

 

[Bob Hedgecutter]

If the threads are mashed up- I would be finding a parts saw for a donor crank- or donor bottom end- a tap is likely to cost more than the saw is worth.
If you have the clutch you can measure the bore and use a thread pitch gauge to get the TPI.