Technical & Reference Section > Tech and Restoration
Serial number identification help - Supergoose
GooseJuice:
--- Quote from: chrisv39 on January 13, 2019, 11:42 PM ---The Mongoose Grand Prix built by ammaco is very similar to a Motobecane and have similar stamps to yours.
--- End quote ---
I'd come across that too. The dropouts were the noticeable difference between the two from what I can tell, with the MGP having different ones to what you see on an SG3 / whatever mine is!
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chrisv39:
Have a look on BMX Museum, there’s one on there made by Motobecane in 1985. :daumenhoch:
GooseJuice:
Every single Motobécane I've looked at has a different shaped frame where the frame joins the dropouts. It's all so odd!!!
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GooseJuice:
Here we are:
https://bmxmuseum.com/forums/viewtopic.php?id=531210
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GooseJuice:
Okay so after much research I've drawn one of two conclusions to try and put this f****r to bed for good. The anomalies:
1. The brake bridge is oval, not flat.
2. The piece of frame where the bottom bracket connects to the chain stay area isn't one flat piece, it's two 'bars' coming out of the bottom bracket.
These match images I've seen of early 80s Mongoose Experts:
https://bmxmuseum.com/bikes/mongoose/60401#.UPxmGCc3iWc
We know from the images of my bike there are shitty welds on the dropouts, so it could be an Expert that's had its dropouts rewelded at some stage.
Or it's just some imitation copy from back in the day.
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