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Old 07-12-2014, 05:44 AM   #1
OldDog OP
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Quick question for the CR500 Guru's

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" 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
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Old 07-12-2014, 09:04 AM   #2
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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.
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Old 07-12-2014, 03:45 PM   #3
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Hey Old Dog sent you a PM
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Old 07-12-2014, 05:03 PM   #4
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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

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
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Old 07-12-2014, 06:39 PM   #5
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Old Dog
Should be in your email let me know if it does not show
Thanks Roger
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Old 07-12-2014, 06:51 PM   #6
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Yup it's shown up, Thanks again Roger much appreciated!
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Old 07-12-2014, 06:59 PM   #7
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No problem Good luck with your project.
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Old 07-12-2014, 10:39 PM   #8
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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

Cheers
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