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When, why are Busa pistons used in SV ?... Is it because they're lighter & higher comp ?.... Other reasons ?
 

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Higher compression and slightly larger. Its a nice and cheap alternative if you are on a budget. Busa pistons, gen1 cam mod, and a thinner head gasket ( sv's race gas) got my friends bike just about 80hp to the rear wheel. Not bad for spending less then a grand.
 

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Higher compression and slightly larger. .
They're not higher compression, they're actually slightly lower compression.

The main benefit is that they're lighter.


They aren't drop in, the cylinders do need honed to get the correct clearance.

The valve pocket angles are different from that of the SV so if you're degreeing your cams you may run into an issue with getting what you want.

How many octane are we talking about ?... our premium pump petrol is 98
You can run what ever octane with busa pistons that you could with stock pistons. Regular gas will do just fine.
 

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How many octane are we talking about ?... our premium pump petrol is 98
the US measures octane differently vs much of the world. there's about a 5 octane difference, so your 98 would be about the same as our 93.
 

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Here in California, the fuel available at a typical gas station is 87/89/91. Some parts of the country top out at 92, others 93.
 
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