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Old 02-11-2013, 09:59 AM   #154
JMo (& piglet) OP
Gone a bit Baja
JMo (& piglet)'s Avatar
Joined: Apr 2007
Location: Somewhere west of Laramie...
Oddometer: 4,431
Warning - photos of machined engine parts to follow for all you metal fetishists!

At the end of last week, John machined the original 690 crank to accept the new pin that will provide the shortened stroke.

Obviously this is still a mechanical prototype using as many existing components as possible to test our calculations - once the specification is finalised, a custom billet crank [with the correct counterbalancing etc to suit the 450cc capacity] will be produced in a limited batch for our race bikes and any customer kits...

We should have a the pressed and balanced crank back towards the end of this week, then Martin can begin the engine build...

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