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Old 2nd July 2012, 23:00   #31
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Default Re: What makes the Cast Iron (CI) engined Bullets cruise effortlessly at low rpms?

Originally Posted by vivriti View Post
What I don't see being mentioned here is the longer stroke of the older RE Bullet which combined wit the (necessarily) heavier crankshaft et al give good pulling power at lower speeds.

Diesel engines too tend to have longer stroke vs bore and petrol engines have squarer bore vs stroke which contribute to the different torque/power characteristics.

The stroke of the bullets have not changed since 1950s ,the Std,AVL and the UCE engines all have the same stroke ,In the AVL engines the dead length of the con rod was reduced still maintaining the same stroke .

The combustion chamber design ,carburation and oil circulation design has been improved .Wile the older engines,Std and AVL runs dry sump,the UCE is a wet sump engine .


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