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 Post subject: Serial number mystery
PostPosted: Tue May 26, 2015 4:16 am 
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I recently purchased what I call a 'rolling basket case'. The serial number is 4R9 000110 on both the frame and engine. I've done several searches trying to identify exactly what year and model this bike is, but haven't been able to locate the 4R9 prefix anywhere. The guy who sold it to me thought it was a 1980 XT500, Can anyone decipher the serial number and tell me what I've got out in my garage? My plan is to turn it into a Frankenstein XT/SR café bike for the street. Anyone have thoughts/info on the challenges involved in turning this thing into a streetworthy machine?

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PostPosted: Tue May 26, 2015 5:05 am 
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It's an 81' XT500H, frame & engine started with 000101 so looks like yours is the 10th built.

Max

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PostPosted: Tue May 26, 2015 7:37 am 
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limoguy wrote:
I recently purchased what I call a 'rolling basket case'. The serial number is 4R9 000110 on both the frame and engine. I've done several searches trying to identify exactly what year and model this bike is, but haven't been able to locate the 4R9 prefix anywhere. The guy who sold it to me thought it was a 1980 XT500, Can anyone decipher the serial number and tell me what I've got out in my garage? My plan is to turn it into a Frankenstein XT/SR café bike for the street. Anyone have thoughts/info on the challenges involved in turning this thing into a streetworthy machine?

In my opinion, the biggest challenge in working on old bikes is the cost of parts and parts availability. The good news is many OEM parts for the Yamaha 500 are still available from Yamaha. Cheers.


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PostPosted: Sat Nov 07, 2015 6:09 am 
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MadMax wrote:
It's an 81' XT500H, frame & engine started with 000101 so looks like yours is the 10th built.

Max

:?: my '81H is 4T9. Is it different for different countries?


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PostPosted: Wed Nov 11, 2015 9:22 pm 
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I am pretty sure that in 1981 some XT500s(different markets) got points ignition and some got CDI ignition.Probably accounts for the two different model codes.


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PostPosted: Wed Nov 11, 2015 9:46 pm 
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bmonk wrote:
I am pretty sure that in 1981 some XT500s(different markets) got points ignition and some got CDI ignition.Probably accounts for the two different model codes.

Yeah, good point. My Aust. delivered '81 is 6v and points ignition. It does mean you have to have your brain turned on when ordering parts on the world wide web.


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PostPosted: Sat Dec 05, 2015 4:11 pm 
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Pretty sure the 81 XT came with either the 4T9 or 5R1 model prefix. 4R9 does not sound right to me.

Paul


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PostPosted: Sat Dec 05, 2015 10:25 pm 
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pcnsd wrote:
Pretty sure the 81 XT came with either the 4T9 or 5R1 model prefix. 4R9 does not sound right to me.

Paul


"R" and "T" are next to each other on the keyboard. Probably a typo.

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