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Thread: Cm450a

  1. #1

    Default Cm450a

    I know the hondamatic is a basic bike with not a lot of aftermarket but i figured I would ask in case there is someone who might have did some custom work and could provide some insight...

    I am trying to see if there is anyway to possibly bore the 450 up to a 500 or another trick to increase the low end... just something to make it a bit quicker... i have scrapped the original airbox for simple cones and straight exhaust all the way back... my buddy has a 920 Virago and i want to be able to keep up... and people have told me get a manual and I would but my ankle is completely fucked from military service... hence why I settled on the Hondamatic... once in a while is ok but I've tried riding manual and after a while it hurts...

    I'm not looking for smart ass answers so please refrain... just looking for advice thank you and Semper Fi

  2. #2
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    check out www.hondatwins.net. they know all there is to know about these bikes,but you're not gonna get a lot out of it.two into one exhaust,maybe an overbore. stock air box as the slides(cv carbs) don't like pod filters.might look into finding a cb750a, as there's a little more aftermarket and they're already quicker to begin with.might not be easy to find,though.ever think of a 74 or earlier right side shift ironhead?thank you for your service

  3. #3

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    I have seen a few cb750a's around but they want top dollar which is understandable... I bought my 450a for 300 paid 200 to hardtail it and 50 for a rattle can paint job so it's not like its a major deal breaker... just wanna be able to keep up with my buddy's 920 Virago lol and thank you it was an honor to serve this great country!

  4. #4
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    the 920 has twice the hp,and cc, to start with,so it's gonna be tough with motor work alone.could try lightening things up too

  5. #5
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    open up the intake, use some Mikunis, open the exhaust up. My 450A chopper ran great plenty of power to get you killed.


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    My 450 chopper would do 100mph all day
    Last edited by Jonnycakes; 06-08-2017 at 7:54 AM.

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