BMX Bikes / M / Mongoose / 1978 Mongoose Motomag
1978 Mongoose Motomag

1978 Mongoose Motomag

Chatsworth built nickle plated "long" frame

My favourtie bike. I've wanted a  Motomag ever since I was a kid, me & my mates were riding Team Murray's, Huffy's & Raleigh Burners back in the day, a Mongoose was considered the ultimate BMX in our humble opinion. Here in the UK at that time they were very expensive. I just love these frames, especially in the Nickle finish, the welds and frame detailing are of much better quality than my Raliegh Burners, to me Mongoose are the original BMX. I bought this from a local guy who bought it back from California, he imports and sells classic American cars, picked this up on a recent visit to the US, and bought it across the pond. I've changed a few components on it since i got it, since it wasn't factory spec and some of the parts were needing replacing so I decided to personalise it with some era correct after market parts, just like we did when we were kids.


Very clean and straight Nickle plated frame with no rust, dents or cracks, Nickle plate is in superb original condition. I polished the frame by hand using Autosol before I applied new frame decals from BMX Products Ltd. Had a few hairy moments getting them to line up perfectly but I got away with it & they look amazing.


Original Tange TX 1200 Champion forks with new "Mongoose" decals. (I have some NOS Tange decals should I ever want to return to original look)


Polished SR stem with Mongoose / Ammaco top cap stamped "BMX". 


Mongoose Chrome high rise bars with NOS 70's blue "Cobra" style (Oakley 3 copy) grips by Landar.


NOS Hunt Wilde oval number plate with NOS ahrma motocross numbers.


NOS Odessey chromoly seatpost and polished Suntour seatpost clamp.


Ashtabula single peice non-stamped crank with anodised aluminium 44T Sugino "snowflake" chainring.


NOS Chrome Union "Rat Trap" peddals.


NOS Izumi nickle plated Chain.


Cast Aluminium "Morris Mag" wheels, made by Rovan Industries fitted with rear Bendix 76 Coaster brake. When I originally got the bike these had been hand painted yellow, I stripped this off to find that originally the wheels were black with polished ridges to the "spokes". I will leave these in the bare aluminium finish. I would have prefered a set of Motomags but it seems Morris Mags are quite rare and a little different, they are period correct being manufactured around 1978. I rebuilt the front axles and replaced the bearings. Fitted with "Motorcross Grip" Duro Tyres. 2.125" front and rear & NOS "Maurice" dust caps.


NOS black Troxel seat dated 1981 which still has factory date sticker on underside.


This bike is a real head turner and gets many comments and interest whenever I take it out, especially down the local skate park, where not many young riders have ever seen anything as "old school" as this. Although now near "mint", with many NOS parts fitted, it's no show pony, this is my summer rider & gets thrashed on a regular basis. The bike rides superbly, it's not exactly a lightweight, but feels very solid and planted at speed and handles like it's on rails!


The last pic with the yellow wheels etc. shows bike how I originally got it after a good polish.



  • Race
  • Company: Mongoose
  • Model: Motomag
  • Wheel Size: 20"
  • Headtube size: 1"
  • Details Chromo mainframe