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  1. #1
    Senior Member Randall-in-Mpls's Avatar
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    How would a 650 camshaft behave in a 500 engine?



    In building the engine for my 500 dual-sport project, I'll need to cut down the camshaft end to accommodate the GL650 radiator and fan that I plan to use. I have the option of using the 650 cam and followers instead. How would the 650 cam effect the performance of the 500 engine?



    I'm hesitant to cut a good camshaft, especially since the Grub is running a mismatched set of cam and followers. I think I need to keep a good spare set ready.





    Thanks,





    R
    1978 CX500 Standard - The Black Maggot -> Green Grub, Red Grub, Yellow Grub???


    1981 GL500 Basket case -> AdvWing (Dual-sport conversion in progress) - Part 1 - Part 2 - Part 3


    1979 CX500 Deluxe rolling chassis -> Hmm?

  2. #2
    Super Moderator CXPHREAK's Avatar
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    Never seen a 650 cam charted Randall.



    The TI 500s have different cams to CDI bikes so they'll at least be different to a CDI bike but possibly the same as TI.
    Help with handlebar and ignition switches.

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  3. #3
    Senior Member Justen's Avatar
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    Doesn't the 650 have bigger cam lobes? Seems to me they different. Never heard it done. Although have heard someone trying to put a 500 cam into a 650.
    My toys
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  4. #4

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    They are quite different(dont have the specs in front of me). I recently sent a 650 cam to webcam to have reworked and inadvertantly called for a 92e cx500 grind. Laurie at webcam called and told me that I would not like her very much if she took that much off my 650 cam, we got it straightened out.

    Dan
    '08 moto guzzi 1200 sport

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  5. #5
    Senior Member murrayf's Avatar
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    much different base circle



    way different lift and duration



    650 cam in a 500 is a slug



    500 cam in a 650 can rap valves at high rpm
    GET AN OIL FILTER ADAPTER

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    Way to many bikes to maintain this list LOL !!!!

    email me at murray at murrayscarbs.com

  6. #6
    Senior Member Randall-in-Mpls's Avatar
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    Quote Originally Posted by CXPHREAK View Post
    The TI 500s have different cams to CDI bikes so they'll at least be different to a CDI bike but possibly the same as TI.
    Never heard that before. Can anyone verify it?





    R
    1978 CX500 Standard - The Black Maggot -> Green Grub, Red Grub, Yellow Grub???


    1981 GL500 Basket case -> AdvWing (Dual-sport conversion in progress) - Part 1 - Part 2 - Part 3


    1979 CX500 Deluxe rolling chassis -> Hmm?

  7. #7
    Senior Member Randall-in-Mpls's Avatar
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    Quote Originally Posted by murrayf View Post
    650 cam in a 500 is a slug
    In what way? I'll sacrifice speed for low-end power. This is a dual-sport, after all.





    Thanks,



    R
    1978 CX500 Standard - The Black Maggot -> Green Grub, Red Grub, Yellow Grub???


    1981 GL500 Basket case -> AdvWing (Dual-sport conversion in progress) - Part 1 - Part 2 - Part 3


    1979 CX500 Deluxe rolling chassis -> Hmm?

  8. #8
    Senior Member guelli02's Avatar
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    Quote Originally Posted by Randall-in-Mpls View Post
    Never heard that before. Can anyone verify it?

    R
    Maybe he mistook (confounded with) different timing/ignition points (CDI vs. TI) with "different" cams. ( ??? )
    A touched system never runs again

  9. #9
    Senior Member murrayf's Avatar
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    there are some diff on overseas bike here with all of the cx being california spec there are no changes to the cam and all one replacement



    part number for all years of the cx500



    14100-MA1-000
    GET AN OIL FILTER ADAPTER

    Order The Quick Build Exhaust Pipes


    Way to many bikes to maintain this list LOL !!!!

    email me at murray at murrayscarbs.com

  10. #10
    Senior Member murrayf's Avatar
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    650 cam wont help you at all



    the 650 has less compression



    the cam has less lift less duration all that equals less power and torque
    GET AN OIL FILTER ADAPTER

    Order The Quick Build Exhaust Pipes


    Way to many bikes to maintain this list LOL !!!!

    email me at murray at murrayscarbs.com

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