Quick question for the CR500 Guru's

Discussion in '2 smokers' started by OldDog, Jul 12, 2014.

  1. OldDog

    OldDog aka Hugh Jarse

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    5,372
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    Howdy all, being a Honda CR500 noob I need to ask what is probably a very embarrassing noob question.......

    How do I identify the year of manufacture of this engine? I have in my possession a water cooled CR500 motor which is pulled down. Apparently this motor was used in serious dirt sidecar use and I have the expansion chamber to prove that much. The guy I got it off said it was from a 2000 or so model, but I've just been informed that its more likely a 86-89 model?

    I'm going to do some nasty, sick "experimental":eek1 things with this engine at some stage, so also need to know which if theres a particular model that is considered a "keeper", any weaknesses etc.

    Thanks

    Bill
    #1
  2. anotherguy

    anotherguy unsympathetic

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    Look here. There's a year code in the VIN. On the engine the number usually starts with 2 or 3 letters. It's in there. Post up the engine number and we'll figure it out.

    BTW the 86 had the biggest peak power numbers but is a real beast due to peakyness. And a peaky CR500 is a scary animal.
    #2
  3. Rd650

    Rd650 Been here awhile

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    Hey Old Dog sent you a PM
    #3
  4. OldDog

    OldDog aka Hugh Jarse

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    Hey Roger, email sent! Thanks.

    I've had a look at the VIN number on the tag and its PE02E 5502833

    Looking at vin number searches this comes up as either an 86-87 model motor or a 96 model motor:huh

    To be truthful, I'm just happy to have a CR500 motor, but I will need to know the year for parts and specs so I can work out just what has been done to the engine.

    Thanks
    #4
  5. Rd650

    Rd650 Been here awhile

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    Old Dog
    Should be in your email let me know if it does not show
    Thanks Roger
    #5
  6. OldDog

    OldDog aka Hugh Jarse

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    Yup it's shown up, Thanks again Roger much appreciated!
    #6
  7. Rd650

    Rd650 Been here awhile

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    No problem Good luck with your project.
    #7
  8. OldDog

    OldDog aka Hugh Jarse

    Joined:
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    Thanks,

    So looks like the engine is largely an 87 model with lots of porting and later model side cover / water pump mount. It's .5 mm over bored but seems to have the longer conrod, and yet has the earlier crankcases which are 5 mm shorter.

    All very strange, but anyway now I have a bit more of a handle on what I have. Dunno if its any better / worse than the more modern ones but the earlier had more power so for me I'm happy to believe the earlier motor is the better one:lol3

    Cheers
    #8