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Parx_400

YZ 450 head pipe question

3 posts in this topic

What is the advantage of having a short straight part in the head pipe as it comes out of the motor vs one that just curves? Here is an example.

The first picture is a PC head pipe for a 03-05 yz 450. The head pipe curves the whole way around and then goes back.

KGrHqFhkE3JQ3FYBQPufLko-60_57.jpg

The second pictures is another PC head pipe that is also for the 03-05 yz 450. Here you can see the bend is different my Dr,D pipe off my old 450 looked like this. My DRD pipe made great power over the stock yz one.

KGrHqJHJDgFCIiQTz7BQooqEt65g60_58.jpg

Anyways I just wondered as I'm pipe shopping for my new 06 wr450. Thanks.

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The bend's different, but is the length of the pipe that much different?

Very generally speaking, with pipes of a given diameter, longer pipes will work best at a lower RPM range than a shorter one.

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Thanks for the help. Thinking about getting the first one above used. I REALLLYY liked the DR.D with the long header on my 05 wr 450 but this seems like a good deal to put on my 06.

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