A few serial number examples are: HF GB 00000 – 4 letters, GB are the dates. This was done to give better clearance for the chain. When rebuilding and restoring old BMX bikes it's extremely helpful to know exactly how your bike is. The serial numbers were hand stamped on the bottom bracket tubes then packed in (empty beer) boxes waiting to be welded to frame tubes. If the serial number of your Mongoose has a number such as 11994, with no letters in or near the number, it is likely a frame from 1975 or early 1976. The letter C stands for Chatsworth, the city in California where the Mongoose was made during the early years of production. The letter C was used for chrome molly. but if the company says its an 78 repro, then thats what it is, i think that all the repro's were based off the 1978 model. Here is my work in progress "1960s and 1970s serial numbers" chart. Some time late 1975 and onwards it became a single layer of steel, more oval and thinner in shape. Check for the letter X instead of the C with the serial number, or look for the letter T in front of, above or below the CB8 sequence. The same coding applies to the first part of the serial numbers as we discussed above, however, if a capital T is in front of or above the CXX  it indicates that it is a 100% Chromoly frame. If the serial number of your Mongoose has a number such as 11994, with no letters in or near the number, it is likely a frame from 1975 or early 1976. The early 7. If you have an account, sign in now to post with your account. This website uses cookies for analytics, personalization and advertising. Search Bicycles by Serial Number. By continuing to browse, you agree to our use of cookies. In April 1. It's proper name is GTAW, or Gas Tungsten Arc Welding. USA made frames from post gusset era, still had the month first, then the year but they were stamped not on the bottom bracket but on the brace behind the bottom bracket. By continuing to browse, you agree to our use of cookies. Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. Is there a way to average resistors together to get a tighter overall resistance tolerance? After the company was sold to Service Cycle, it seems all frame production was moved to Tiawan.   You cannot paste images directly. A further feature was the headtube was offset to extend more to the bottom than it was to the top. The "heli" in heli arc comes from the shielding gas helium that was used. If the frame has a T in addition to the other letters and numbers, it is probably a Team Mongoose, a Team Minigoose or a Supergoose. The frame components were manufactured in different stages and or departments and some of the parts were exhausted quicker than others, it this process that lead to some of the frames “crossing over” to different years, especially during the end of the year. Im looking to ID a rebuilt touring bike with serial number. A vintage Mongoose is certainly a prize in the hands of any serious collector, but you'll want to be sure that what you're looking at is actually "vintage." Maker of BMX, MTB and Urban Bikes. color: #ccff33; The number is sy6h00o680 it's late 90s I believe G is the year (1997), B is the month (Feb) HF BH 00000 – 4 letters, BH are the dates. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. From here frames were stamped with the letter C for Cromo, a letter for the month, and a number for the year of production. Clear editor. Her works have appeared in anthologies, such as "From the Trenches" and "Black Box," in the magazine "Neo-opsis," and on numerous websites. As a general rule anything with a Gusset behind the head tube was manufactured in the USA. bmx 13 image by Marc Rigaud from Fotolia.com. .style1 { When they dropped the "C", it was realised that there was no need for it, as there were other ways to ID a Team/Supergoose (full cromo) frame. Of course these are general guidelines in identifying Mongoose frames and there are the anomalies to this process of serial number identification. Then next came the first Californian and Expert frames and were USA made, while they were getting setup for Tiawan production. Transactions resulting from this search may be shared with law enforcement agencies upon request. EG: Bike frame stamped 9143D. This guideline also applies to Team Mongoose, Supergoose, Jag, Blue Max, Roger DeCoster, Super-X, and  Moto-Trac frames. There was a few . This applies to all frames made, EXCEPT those starting with the letter . In Mongoose v2 you could have depended on MongooseNumber:. It is often on the bracket tube that is welded to the frame tube. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. This feature carried over for the first few years till the ashtabula forks were replaced with the more rounder style Tange made forks. 1 = 1981 BMX Products Inc. (maker of Mongoose) used the same format for all of their bicycle brands (Jag, Roger DeCoster, Moto-Trac, etc..) with a few exceptions. NB: There are a few anomailes to this, that do show up from time to time. Chromoly frame. 9 = 1979 Depending on the year, however, it might be located on the brace behind the bottom bracket. How is secrecy maintained in movie production? This feature carried over for the first few years till the ashtabula forks were replaced with the more rounder style Tange made forks. There is some inconsistency in Mongoose serial numbers, due to how the bikes were assembled. Bob Osborn BMX Society Guest of Honor 2020. The easiest way is to check the brake bridge for the extra two slotted holes that were added. The first digit was a letter followed by a one digit number F2 meant June of '82 (using the same code as the bike models above) and these SN's were no longer found on the BB shell, but rather the lug behind it. C = March Check for a three-digit designation that doesn't begin with the letter C. In April 1981, the company decided to drop the C and use only one letter, in the A to L sequence, to indicate the month of production, followed by the number indicating the year of production, followed by the sequential serial number.