461R build up

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Kind of a wrap on these as stocks are dried/ing up, so here's a build thread on the World's last ported new 461.

Tear down is pretty basic as well as covered before, a place to start nonetheless.

 

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After initial timing check, ready it for mounting in the lathe.

 

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Once in the four jaw, it needs to be zeroed out first.

 

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Set up boring bar and zero out dial indicator for depth.

 

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If everything is good, give it a whirl and get to cutting. I like to go .010" on the first cut to get behind the chrome lip first, then back off to half that on subsequent cuts, with a final .002" finish cut.

 

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Double checking the triple check manually before removal.

 

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After a quick wash, squish is checked one more time.

 

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Now with the base cut the final squish is set

 

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Target is reached.

 

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Final finish of machining.

 

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After one more timing check, it's time for mounting up in the porting stand.

 

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Cover up for the night and take a break.

 

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Give it a good go on the exhaust port.

 

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Matching up the intake.

 

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Matching up the exhaust.

 

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Once happy with it, I give it my stamp of approval.

 

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Prep the carburetor and file the flywheel key.

 

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Muffler modding time.

 

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Three is better than one.


All screened up for forestry work.

 

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Outerwears to keep things clean and flowing in the air department.