Author Topic: 1963 onward Bullet crankcases  (Read 297 times)

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  • Scooter
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on: September 03, 2022, 10:56:49 am
Hi can someone please explain ,why Bullet crankcases from 1963 onward appear to be the same as 250 Crusader items,are the interchangable .


  • Grand Gearhead
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Reply #1 on: September 03, 2022, 11:20:37 am
In 1963 the 350 "New Bullet" came as a unit construction and is -as you said- basicly a bored 250. The classic pre unit Bullet was dropped completely as bigger singles weren't in fashion anymore. So the unit Bullet was built for a short time, until it was dropped as well and only the big twins and smaller singles carried on.


Adrian II

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Reply #2 on: September 03, 2022, 01:33:43 pm
This was only for the UK New Bullets of course, Indian Bullet crankcases continued on in the Redditch pattern, with a partial redesign in the 70's to swap to metric main bearings.

Grumpy Brit still seeking 500 AVL Bullet perfection! Will let you know if I get anywhere near...