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-   -   Asian Serial Number Guide (https://www.bikeforums.net/classic-vintage/1042901-asian-serial-number-guide.html)

Trueblood 03-18-21 04:56 PM


Originally Posted by T-Mar (Post 21973117)
If you go back go post #1, you'll see that the Zebrakenko entry directs you to entry D(1), which I believe may represent Kenko. The 2nd character appears to be the year indicator, while the 3rd could be a month or fortnight indicator. You report two serial numbers starting with DOX, suggesting the latter and that the frames were manufactured during the 24th fortnight of 1980. The one outlier to the interpretation is the D3B S/N on the 1978(?) storm. I'm wondering if the 3 might be a partially stamped 8? I'd appreciate an good, overall, drive side photo of each bicycle and the serial numbers.

Hi, thanks very much for the info! There is a thread from last year on Zebrakenko bikes here - https://www.bikeforums.net/classic-v...ebrakenko.html Another poster added a serial number for one as well - post #12 - https://www.bikeforums.net/21519401-post12.html

My post (#28) has photos (from the drive side) of the bikes with the serial numbers I listed by color - https://www.bikeforums.net/21721993-post28.html The blue Blue Sky was not a great bike, and I sold it. It had stamped drop outs, etc. I will try and get photos of the serial numbers.

Do you think Zebrakenko had their own factory, or had the frames made by another frame manufacturer?

Thanks again!

T-Mar 03-20-21 09:53 AM


Originally Posted by Trueblood (Post 21974099)
Hi, thanks very much for the info! There is a thread from last year on Zebrakenko bikes here - https://www.bikeforums.net/classic-v...ebrakenko.html Another poster added a serial number for one as well - post #12 - https://www.bikeforums.net/21519401-post12.html

My post (#28) has photos (from the drive side) of the bikes with the serial numbers I listed by color - https://www.bikeforums.net/21721993-post28.html The blue Blue Sky was not a great bike, and I sold it. It had stamped drop outs, etc. I will try and get photos of the serial numbers.

Do you think Zebrakenko had their own factory, or had the frames made by another frame manufacturer?

Thanks again!

I went back and checked my database. Curiously, I've recorded a 1978 burgundy coloured Storm with what initially appeared to be serial number D3B0781, only one frame removed from yours! Closer examination indicated the '3" was actually a '8' , as you could just see separate curls to the left of the intersection of the top and bottom circles (see attached). Given the proximity of the two frames to each other, it would appear that the manufacture had a issue with the '8' stamp or the holder.

Regarding the manufacturer of your bicycles, I don't have a definitive answer. Zebra bicycles date back to 1901. Circa 1969 they merged with the Kenko brand to form Zebrakenko. They started USA distribution in the mid-1970s. I've seen some evidence suggesting that late 1970s model were being produced from the Kenko side of the operation. Whether this is true or was still true into the 1980s remains to be determined.
https://cimg0.ibsrv.net/gimg/bikefor...eb6a3823db.jpg

Trueblood 03-20-21 12:36 PM


Originally Posted by T-Mar (Post 21976409)
I went back and checked my database. Curiously, I've recorded a 1978 burgundy coloured Storm with what initially appeared to be serial number D3B0781, only one frame removed from yours! Closer examination indicated the '3" was actually a '8' , as you could just see separate curls to the left of the intersection of the top and bottom circles (see attached). Given the proximity of the two frames to each other, it would appear that the manufacture had a issue with the '8' stamp or the holder.

Regarding the manufacturer of your bicycles, I don't have a definitive answer. Zebra bicycles date back to 1901. Circa 1969 they merged with the Kenko brand to form Zebrakenko. They started USA distribution in the mid-1970s. I've seen some evidence suggesting that late 1970s model were being produced from the Kenko side of the operation. Whether this is true or was still true into the 1980s remains to be determined.
https://cimg0.ibsrv.net/gimg/bikefor...eb6a3823db.jpg

Thanks again T-Mar, yeah, not sure about that #3 stamp thing. Other number 8 stamps seem to come through well, as with the 81 Thunder Mixte below and the 8 in the serial number photo you provided above. I don't think it is a scribal error, could the letter D perhaps interfere with the 8 due to spacing? I am adding the photos you requested of the serial numbers together with the drive side of each bike, starting with the burgundy 78 Storm. I was mistaken about the last three numbers, it appears to end in 700, not 780. I have always liked this era of Zebrakenko bikes aesthetically, both for the head badge and the lack of decals on the down tube. Around the end of 1981 they changed the head badge to a Zebra head and started adding the Zebrakenko name on the down tube, and every now and then you encounter one with the older lion head badge with the newer Zebrakenko decal on the downtube. Thanks!

1978 Storm - burgundy


https://cimg0.ibsrv.net/gimg/bikefor...74eb266650.jpg
https://cimg3.ibsrv.net/gimg/bikefor...6b65d2b279.jpg

1980 Storm - red

https://cimg1.ibsrv.net/gimg/bikefor...02593324dc.jpg


https://cimg4.ibsrv.net/gimg/bikefor...5a1ebdc258.jpg

1981 Thunder mixte - burgundy


https://cimg3.ibsrv.net/gimg/bikefor...5494423a93.jpg


https://cimg4.ibsrv.net/gimg/bikefor...0e44e433a8.jpg

1977 Wind - black - please note that this frame was powder coated as the chrome sox were too far gone. It originally resembled this bike - https://www.bikeforums.net/21690954-post27.html Same chrome sox front and rear, brakes, crank, and wonderful ratcheted friction shifters.

https://cimg3.ibsrv.net/gimg/bikefor...5cf90e36c1.jpg

https://cimg8.ibsrv.net/gimg/bikefor...d65e0ed7f5.jpg

I am limited to 10 images per post, so adding the last two on an additional post for the 1980 Blue Sky - blue.

Trueblood 03-20-21 12:37 PM

1980 Blue Sky - blue - Definitely a lower end bike, turkey wings, stem shifters, stamped dropouts. Nice color though.


https://cimg2.ibsrv.net/gimg/bikefor...b51fc61afa.jpg


https://cimg3.ibsrv.net/gimg/bikefor...08b1b881ff.jpg

baguslho 03-20-21 11:54 PM

Thank you for source🙏

oneclick 03-22-21 03:28 AM

Norco Monterey SL
 
This followed me home yesterday - Norco Monterey SL, Ishiwata EX tubing. Wheels are Sansin/Araya, bar/stem WIN, post Strong alloy (with a steel cradle), brakes DiaCompe, crank Sugino VP, rear mech Suntour 3040, it and the shifters say Accushift. Post is 26.8mm.

Serial decode / year and manufacturer?


https://cimg6.ibsrv.net/gimg/bikefor...0bb8359ddb.jpg
https://cimg7.ibsrv.net/gimg/bikefor...7f89deb89d.jpg

T-Mar 03-22-21 06:01 AM


Originally Posted by oneclick (Post 21978574)
This followed me home yesterday - Norco Monterey SL, Ishiwata EX tubing. Wheels are Sansin/Araya, bar/stem WIN, post Strong alloy (with a steel cradle), brakes DiaCompe, crank Sugino VP, rear mech Suntour 3040, it and the shifters say Accushift. Post is 26.8mm.

Serial decode / year and manufacturer?

While I don't know the manufacturer or the serial number format, pending confirmation on the rear derailleur, my leading candidate is a 1988 model. Norco didn't introduce that logo style or the SL version of the Monterey until the mid-1980s. The seat tube logo wasn't added until after 1987 and the 3040 rear derailleur was introduced for the 1988 model year as a member of the Alpha series, being re-designated as Blaze 3040 for the 1989 model year. The rear derailleur doesn't resolve well in the photo but since you don't mention Blaze, I assume it's the 1988 Alpha version (see attached). Assuming this and reverse engineering the serial number format would suggest a 1988 model manufactured in late 1987.
https://cimg3.ibsrv.net/gimg/bikefor...699bcdff2.jpeg

oneclick 03-23-21 04:32 AM


Originally Posted by T-Mar (Post 21978656)
While I don't know the manufacturer or the serial number format, pending confirmation on the rear derailleur

Rear mech is <alpha-character>3040.

I have seen at least one other similar serial for this model; only the last three digits differed.

I have not seen any photos of this model with a bare chrome fork - or indeed any plating. Is it a rairity or a replacement?

I have seen other same-model frames that are not Ishiwata EX - was it a particular year(s)' production?

T-Mar 03-23-21 06:09 AM


Originally Posted by oneclick (Post 21980475)
Rear mech is <alpha-character>3040.

I have seen at least one other similar serial for this model; only the last three digits differed.

I have not seen any photos of this model with a bare chrome fork - or indeed any plating. Is it a rairity or a replacement?

I have seen other same-model frames that are not Ishiwata EX - was it a particular year(s)' production?

If you've seen another Monterey SL with a serial number that differs only by the last 3 characters, it is likely from the same production lot. Therefore, the fork on that that bicycle would be the best indicator to tell you whether your fork is a replacement or original to the bicycle. .

You'll find the Monterey SL with Tange and Ishiwata tubing and different tubesets from those two manufacturers, depending on the year. For instance, in 1985 it used Tange #5, changed in 1986 to Ishiwata EXO and was downgraded to Ishiwata EX for 1987. Various factors come into play when selecting the tubeset such as frame builder preference, availability, pricing, etc. BTW, given the bicycles level, I wouldn't be surprised if your bicycle doesn't used the full Ishiwata tubeset and has hi-tensile stays and/or blades as a cost concession.

Gold Country 04-25-21 10:39 PM

I still canít post pictures until I hit 10 posts and I can only do five per day before getting locked out. Iíll upload pictures tomorrow, but hereís my serial: R331034

The bike is a Bridgestone with a 3-speed hub.

T-Mar 04-26-21 06:52 AM


Originally Posted by Gold Country (Post 22031543)
I still canít post pictures until I hit 10 posts and I can only do five per day before getting locked out. Iíll upload pictures tomorrow, but hereís my serial: R331034

The bike is a Bridgestone with a 3-speed hub.

Based on the frame characteristics, in conjunction with the serial number, your bicycle would appear to be a 1974 model manufactured in late 1973. Pic assist...
https://cimg0.ibsrv.net/gimg/bikefor...1be44b667.jpeg

Gold Country 04-26-21 01:01 PM

Thanks T-Mar

Gold Country 04-26-21 01:06 PM

T-Mar , any idea what the model is? Iíve searched for 1974 Bridgestone and none of the pictures look similar. In fact, the lugging all looks different than this die cast model. Iím wondering if perhaps that is because all Iím coming across are pictures of 10-speed type bicycles.

T-Mar 04-26-21 04:52 PM


Originally Posted by Gold Country (Post 22032376)
T-Mar , any idea what the model is? Iíve searched for 1974 Bridgestone and none of the pictures look similar. In fact, the lugging all looks different than this die cast model. Iím wondering if perhaps that is because all Iím coming across are pictures of 10-speed type bicycles.

Bridgestone wasn't widely distributed in the USA during this era. Most of the Bridgestone manufactured bicycles that came into the USA around this time were badged as Kabuki. Often Bridgestone and Kabuki models shared model names. The Kabuki 3 speed of this period was called the Commuter, so that may be the name of your bicycle.

Gold Country 04-27-21 06:03 PM


Originally Posted by T-Mar;[url=tel:22032773
22032773[/url]]Bridgestone wasn't widely distributed in the USA during this era. Most of the Bridgestone manufactured bicycles that came into the USA around this time were badged as Kabuki. Often Bridgestone and Kabuki models shared model names. The Kabuki 3 speed of this period was called the Commuter, so that may be the name of your bicycle.

Gotcha, thanks again! I got it in trade from my buddyís dad. He got it in trade in the 70s from a Japanese guy. That guy was the original owner of a deli called La Bou, which became a franchise in Northern CA.



Iíll freshen up the bearings, figure out whatís going on with the 333 hub and get some new tubes/tires for a start.



Any recommendations on a quality riveted saddle that looks correct on the bike?

russo.vedjeva 04-30-21 06:54 AM

Hello, dear friends!
I've got interesting bike with some japanese parts. Repainted almost two times. Hope for your help in identifying.
Serial number: RB014088
Fork with IS Rib End dropouts
Frame without derailleur hanger and cablestop
rear derailleur: SunTour HONOR
front derailleur: SunTour Spirt
stem shifters SunTour
bottom bracket cottered with crankset Sugino
freewheel atom 77
wheels 27x1 1/4" : hub chair, rims araya and rigida

russo.vedjeva 05-01-21 05:18 AM

added some photos in gallery as "unknown bicycle to identify"

T-Mar 05-01-21 11:46 AM


Originally Posted by russo.vedjeva (Post 22037992)
Hello, dear friends!
I've got interesting bike with some japanese parts. Repainted almost two times. Hope for your help in identifying.
Serial number: RB014088
Fork with IS Rib End dropouts
Frame without derailleur hanger and cablestop
rear derailleur: SunTour HONOR
front derailleur: SunTour Spirt
stem shifters SunTour
bottom bracket cottered with crankset Sugino
freewheel atom 77
wheels 27x1 1/4" : hub chair, rims araya and rigida

Welcome to the forums. I was having problems with this, until I saw the photos. I don't think this is Asian but Canadian. The serial number looks like it's stamped on the back of the upper seat tube, which would be proper for a Canadian built Raleigh. The serial number is also the correct format for Raleigh of Canada and, if so, indicates that the frame is from January 1980. Based on the sky blue colour and components, it's a good match for the Canadian market Raleigh Royale, converted to upright bars.

Over the past three decades I've re-conditioned bicycles for donation to Chernobyl children. I wonder if this could be one that found its way from there to Moscow? The odds would be very small but then again, so are those for a Canadian bicycle in Russia.

russo.vedjeva 05-06-21 07:31 AM


Originally Posted by T-Mar (Post 22039905)
Welcome to the forums. I was having problems with this, until I saw the photos. I don't think this is Asian but Canadian. The serial number looks like it's stamped on the back of the upper seat tube, which would be proper for a Canadian built Raleigh. The serial number is also the correct format for Raleigh of Canada and, if so, indicates that the frame is from January 1980. Based on the sky blue colour and components, it's a good match for the Canadian market Raleigh Royale, converted to upright bars.

Over the past three decades I've re-conditioned bicycles for donation to Chernobyl children. I wonder if this could be one that found its way from there to Moscow? The odds would be very small but then again, so are those for a Canadian bicycle in Russia.

Yeah, T-Mar! Looks like that's it!
Many thanks!

That's so interesting history about it. I'm really wondering if that surely that. Need to check for radiation)))

There, in Moscow, you can find interesting things from all over the world, and no one will care about it.
It is a pity that it was so badly repainted in its native color, and I can't do anything about it(

Found the only one photo of this bicycle in low-res. And no information about this, in old catalogues. :foo:
My seatpost clamp is clamped, and seatpost diameter now is 25.4 =(
If you know, where can i find correct seatpost diameter?
Thanks for the answer :)

T-Mar 05-06-21 10:05 AM


Originally Posted by russo.vedjeva (Post 22047343)
...Found the only one photo of this bicycle in low-res. And no information about this, in old catalogues. :foo:
My seatpost clamp is clamped, and seatpost diameter now is 25.4 =(
If you know, where can i find correct seatpost diameter?...

I've got the Raleigh Canada catalogue. Actually, it's more of a poster. There's not much info. Unfortunately, I don't own a scanner. The next time my son is home with his Smart Phone, I'll get him to take a picture and post it here.

Regarding the seat post size, it's a basic hi-tensile steel frame. My recollection is that these took either a 25.4mm or 25.8mm seat post. Sometimes, the seat clamp distorts, even with the correct size seat post. Take a look at the actual cinch slot cut into the back of the seat tube. For a properly sized post, the cinch slot will be about 0.6mm narrower at the top, than at the bottom. If the correct size post is 25.8mm the cinch slot would be about 2mm narrower at the top.

T-Mar 05-10-21 03:35 PM

@russo.vedjeva here's the poster image for the Royale. As I said, there's not much info but it's a good match visually and it came in Sky Blue.
https://cimg2.ibsrv.net/gimg/bikefor...fb3a24adc7.jpg


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