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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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Old 06-04-2012, 05:48 AM
Bikeguy Joe Bikeguy Joe is offline
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Default Re: Engine sizes

Originally Posted by donphantasmo View Post
Every few months, this same discussion comes up. There is no such thing as 80cc. If it makes you feel better to say that your bike is a 80 cc, while mine is a 66cc, then go ahead. lol.

They are all 49cc or 66cc.
Except for the 60cc(58cc) and 55cc(47cc)(45cc) engines. I have one of each.

Last edited by Bikeguy Joe; 06-04-2012 at 05:51 AM.
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Old 06-04-2012, 09:41 AM
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biknut biknut is offline
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Default Re: Engine sizes

It's been common practice since the beginning of time for manufacturers to call their motors something they're not.

For years Sportsters were called 900s, but they were always 883s.
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Old 06-05-2012, 04:01 PM
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donphantasmo donphantasmo is offline
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Default Re: Engine sizes

Originally Posted by Geezer View Post
well don, i guess you didn't view the link i posted or read any of the previous posts... the link shows 3 different sized pistons & venice posted that there are indeed 3 different sizes just that none of them are truely 80cc. I realize there has been a lot of debate on what the true size of these engines are but it doesn't matter to me what they call them, i just want mine to all be the same size so that the parts are interchangeable...

they're all 49cc if you ask me at least thats what i'll be sayin if i ever get pulled over

Geezer. I saw your post, and looked at your link. I didn't think the two on the right are very different. If they were, oops, my bad.

I have always had motorcycles waaaay before I even looked at motorizing bicycles.
BIKNUT was right, R1 is a 998. ZX6Rs are 636s.

But, some engines are pretty much close. The 49cc bikes are called 49cc because they're 49cc. 66cc is called 66cc, but often the 80cc motors are mistaken for 80cc, when they're actually 66cc.

Use the search tab, and look at the posts. There are a million other posts just like this one that say the same thing..
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