In the process 450 exhaust cam question?

5 replies to this topic
  • Raven1911

Posted March 18, 2006 - 04:33 PM


Hey guys,

I am in the process of switching out my 426 cam for the 03 450 cam. I noticed the 450 cam has a little knob on it that my 426 cam doesn't have. Is that the auto exhaust? Just want to make sure before I bolt it together. I am sure of the part number. If you don't know what I am talking about I can post a pic. thanks

  • dsconstructs

Posted March 18, 2006 - 04:53 PM


That little knob is what opens the exhaust valve creating the decompression at low rpm, while starting. Then when the rpms pick up, after it starts, that is retracted in.

  • MNellis

Posted March 18, 2006 - 05:30 PM


Yes, the little knob is the "auto-exhause" feature. If you move the weight on the end you'll see it retract and that's what happens when the engine fires up.

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  • Raven1911

Posted March 18, 2006 - 07:30 PM


Cool thanks fellas.

I am trying to find a 195 and 200 shim to complete my cam but am having a hard time finding them. I am NOT buying a whole shim kit for $100. Let me know if you have any suggestions. I am going to look into some other cycle shops tomorrow.

  • dsconstructs

Posted March 18, 2006 - 07:33 PM


Remember that Honda shims fit also, if that helps. That's where I got mine since they were in town.

  • Birdy426

Posted March 18, 2006 - 09:37 PM


Nationwide Cycle in Lancaster has a huge selection of the 9.5mm dia shims you need.

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