Just automotive paint and three coasts of clear The fork came chromed I just polished

[MENTION=235305]RaleighSport[/MENTION] I signed up just to be able to post in this thread
I bought a sekai frame off my buddy for 20 bucks original derailuers I think. But it has straight bars on it.
The serial number isn't in the usual place it's on the seat tube.


In all her beauty


Immaculate headbadge

If I remember right Camel, that's just a DSRM Serial #, I just added the decoding system for that in the serial area, you can navigate there from post #1 on page #1 . I believe it's an 87, and I dig it man loved those fade paintjobs! So are you going to switch to dropbars?

[MENTION=235305]RaleighSport[/MENTION] thanks man. I love that I can add mine to the database. Any idea what model it might be? I can't find any on Google like it. Also what would be original parts and how hard are they to attain?
Thanks for the quick response btw

I actually like the straight bars they're comfortable but it just doesn't look right haha I even thought about doing fixie style upturn bars with vintage dia-comp centerpulls that I scavenged off an old Murry 10 speed.

With the lack of decals and the era it's fairly hard to place to be honest, to give you an example this is a 2600 also from 1987

It's thread being here https://www.bikeforums.net/classic-vi...ai-2600-a.html
This bike though is equipped with full 105 it looks like and is definitely a "racing" bike.

Your RD might be 105 but it's hard for me to say from looking at it in that pic, close ups or disclosing your drivetrain components might help in identifying the bike as well.

[MENTION=235305]RaleighSport[/MENTION] oh man. I think I have a goal now. That bike is beautiful, and the teal fade is sick.

FD


RD


Crankset

anyone know what type of bottom bracket tool I need for this? It is on the Sekai Mountain Bike

Upon removing the tire the tube is 2 3/4

That is very interesting, I can't say I've seen a BB like that before, did you by any chance solve it?

Not Yet interesting

This is for ISIS BB's but it looks almost right...
BB Remover - XTR BB-950 & Truvativ - Bottom Bracket Tools

That is too big in diameter and for the outer lock nut

Yeah I figured as much, and if you look at an ISIS BB there's no way a tool for it would work on your BB, but it actually has what appears to be the right number of teeth and pattern even though the diameter as you noted won't work. I did some light research (In between studying for an exam), and came across some odd old shimano BB's that almost resemble yours but are definitely not.

This is my Sekai 2500 Grandtour, which I bought new in 1977. I rode it steadily for 20 years, then gave it to my brother, who rode it for a while then put it in a storage shed. When I decided to rescue it it was filthy but surprisingly okay underneath. I didn't want to butcher it, but thought it would make an excellent randonneur-type bike. I swapped the 27-inch wheels for 700C Mavics, installed DiaCompe centerpull brakes to gain fender clearance and better braking, and got some pretty hammered-aluminum fenders from Velo Orange, along with a Berthoud handlebar bag. Brooks saddle, NOS Suntour Superbe brake levers, shellacked handlebar tape. The original derailleurs were in fine shape; I put NOS jockey wheels on the rear Suntour Cyclone. The seat tube decal was in good condition, but the downtube decal was mangled, so I got a replica made by Velocals, which is indistinguishable from the original. I'm riding it regularly again, and it gets all sorts of attention. Most people think it's a new brand they haven't heard of.

I'm looking for information on mangalloy tube stickers, if you've got a sekai with one of those stickers please check in. Going to be adding a frame material section next.

(Don't pay any attention to this post)
Flagged, check serial.
Father/Sons
https://www.merrysales.com/MerryHistory100th.web.pdf

Rebecca Twig (Don again)
https://www.ece.ubc.ca/~gillies/sekai...cca_Twigg.html

This post also does not exist.

(Attribute Don Gillies)

I believe that in earlier years the Sekai 4000 was mass produced ofTange #1 tubing, by Miko, while the Sekai 5000 was a handmadesuperlight frame made by a guy named S. Higashigawa: https://www.ece.ubc.ca/~gillies/sekai/SEKAI.txt https://www.ece.ubc.ca/~gillies/sekai/77_06_custom.jpgI don't know of any database of serial numbers for SEKAI. If yourbike has some original paint you can estimate the time period from thebadging:HEAD BADGE Swirly Blue Badge (pre-78) [Sekai77] [Gillies2011] https://www.ece.ubc.ca/~gillies/sekai/SEKAI_bigbadge.JPG Hexagonal Multicolor Badge (78-onwards) [Muzi2011] https://www.ece.ubc.ca/~gillies/sekai..._about79_2.jpg https://www.ece.ubc.ca/~gillies/sekai...nt.JPGDOWNTUBE SEKAI(big, alone) Downtube, Model name (toptube), 73-76 https://www.ece.ubc.ca/~gillies/sekai/sekai709.jpg SEKAI(big) + Model number + Model name(stacked) Downtube, 77-79(?) with black pin striping around the whole thing https://www.ece.ubc.ca/~gillies/sekai...9_leftside.jpg SEKAI(big) + Model number(big) Downtube, 1980(?)-onwards https://www.ece.ubc.ca/~gillies/sekai...79downtube.JPG https://www.ece.ubc.ca/~gillies/sekai...ersey.jpgTANGE DECAL CHAMPION Green (written horizontally), 73-78 https://www.ece.ubc.ca/~gillies/sekai...eatcluster.jpg CHAMPION Green (written diagaonally, like 531 in reynolds), 79-onwards? https://www.ece.ubc.ca/~gillies/sekai...ion_decal2.JPG TANGE (yellow decal with blue oval), pre-1980. https://www.ece.ubc.ca/~gillies/sekai/Tange_Sekai.JPGOn the 4000 (I have 2x), I have seen long-point italianesque chromedlugs throughout the 70's, and prugnat lugs often unchromed (later,maybe 1980+). The frame was painted in "lacquer over chrome", for adeep translucent color. Comparable bikes are the Wilier Triestina(mid 1970's), Fuji Finest (1971), Rampar Superbe (1980), and all ofthe "Achrillichrome" Carlton bikes.The Sekai 4000 fork has a light mass-produced Tange fork with stampedand welded crown so it is normal for the fork dropouts (Tange TF) tomismatch the Shimano rear dropouts (Shimano SF).The 4000 model was a lightweight frameset, see the comparison table ofweights below. The Sekai 4000 at 24 inches (c-t) weighs 2934 gramswith fork crown race installed and is fully chromed; This is probablylighter than my early 531 Raleigh-Ilkeston Team bike at 2996 gramswith BB routing and a bottle braze ons, and fully chromed fork.In the 1970's both the 4000 and 5000 models were offered asframe-only. There would be no standard build for a 1970'sframeset-only offering.

Just got the bike I Wonder if anyone can give information about the bike and estimate its value, it has a Motioncraft decals and emblem, with miki sakai sticker serial no. M2K48821, shimano tourney u brakes with dee-50 handbrakes & shimano fe derailleur



Thanks for the help.

hey BF,
I just bought my first commuter this weekend. There were a few good options on CL and this forum was instrumental in helping me decide.
I ended up buying a 1979 Sekai 2400 that had been sitting in a garage for 10-15 years and is in need of some tlc. The guy I bought it from gave me a box of bike gear as well which included a helmet, some gloves, a ton of patch kits, and also all of the documentation that this bike came with originally and since accrued in the past 36 years. I thought the coolest bits were the original bill of sale and warranty card and the Sekai '79 catalog and I thought you guys might get a kick out of them, too.

thinking about putting some thicker tires and a mustache bar on for my casual commuter needs. still sifting through all the great threads on this site; information overload!

Welcome to the Sekai owners club.

Nice find! I guess I'll be the first person that asks if you'd please post pictures of all catalog pages that have bikes or specs on them

happy to oblige. incoming photo dump!


i tried to clean up the photo of the specs as best i could. let me know if you can't make out the words. if there's a lot of interest i may just make a spreadsheet.

Thanks for the awesome photos! Now I know that my 500 is an "excellent 10-Speed"

Here's a small '83 2700 GT that I just overhauled for sale.