High Quality Chainsaw Bars Husqvarna Toys

Bore and stroke of a Husqvarna 450 rancher?

r7000

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Can someone tell me the bore and stroke of the Husqvarna 450 rancher that is advertised as 50.2cc?
Thanks.

And also if there is a big bore cylinder and piston kit for it, and what cc that would then make the engine.
 

Terry Syd

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Bore 44mm, stroke 33mm.

The 450 is already a bored out 445. There are no big bore kits for it. The biggest issue is transfer flow in the cylinder. The cylinder transfer tunnels are made for the 445 and are already 9% too small for the bigger 450 engine. If you want to bump the power of the 450, you have to do some work to the transfer tunnels - at least clean them out at the base where all the casting flash is...
 
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