Crankshaft pinion

Hi.
One of the pinion that i have (in the bottom of the picture) is 1 mm thin than other (14 mm/15 mm circa)
Why?
Thanks.
Pieo

Thin one is standard commando thick one is Atlas and better for hi power use as commando version is known to loose teeth if pressed to the max>

pierodn said:

Hi.
One of the pinion that i have (in the bottom of the picture) is 1 mm thin than other (14 mm/15 mm circa)
Why?
Thanks.
Pieo

Click to expand...

My guess is....

Early twins/all T2035 certainly all the featherbed engines I own...

68-74 commando NMT2035 same part IAW parts books
all .564" 14.32mm

1975 MKIII because of wider cases therefore narrower gear 06-5670
.494" 12.54mm

Do you have something different?