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Discussion Starter · #1 ·
I've got an idea and I'm trying to find out what serial number rage would be correct for a CB450 K1 upper engine case.
Motorera.com states the frame no range for the K1 from CB450-3000001 to CB450-3008955 (only 8955 made?!).

Would this range also be correct for the engine no?
 

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Sensei
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Ronnie, Engine numbers seldom matched, and were usually just "similar".....Ideally your range is correct, but in reality it is likely that any 300XXXX sequence engine could have been in there..... A 301XXXX would definately be a K2 however, so yes, there were less than 10,000 K1's...........(as far as my references go)
 
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