Motobecane D55 Motor Teardown

Dirty30 Dillon /
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I am in the process of pulling apart my Moto G.A.C. NTT50 DX Cross, which is equipped with a licensed duplicate of the Motobecane D55 motor, and wanted to catalog some of the process as there isn't much info on these stateside. This bike was Licensed to Moto G.A.C. (along with pretty much the entire line up at the time) for production and resale in Spain.

Here's a great site for some history on Moto G.A.C. and coverage of the models they made.

IMG60771484800596071341.jpg

Here's the bike as It sat prior to getting it to back home. It's a 5 speed, 49cc shifter with pedals that rotate and index to become passenger pegs. COOL

Upon getting it home and getting it running, there was a pretty solid grinding/whirring noise when it was running, I had hoped that getting it to loosen up after sitting and running fresh oil would clear it up but no luck. So, I decided it must be the main bearings (as it occurs whether in gear or not, and followed RPMs) and pulled the motor.

IMG_20200412_145456.jpg

Fairly easy. Single chain, two wires for the entire system, and the carb. While this has a SHA intake on it, either the factory or someone else made a custom shim to run a PHBG 15 on there, which was actually running very well.

Here's a shot of the ignition side. Standard Novi, except produced in Spain. The red cap is the chain oiler cover, and the cast bracket that is attaching the pedal shaft to the frame is a stabilizer/pawl setup for starting the bike.

IMG_20200412_130059.jpg
This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Motobecane D55 Motor TeardownTopic by: Dirty30 Dillon Dirty30 Dillon 04/15/20 09:50AM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 04/15/20 10:05AM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 04/15/20 10:36AM
  Re: Motobecane D55 Motor TeardownRe: P D P D 04/15/20 11:35AM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 04/15/20 12:33PM
  Re: Motobecane D55 Motor TeardownRe: P D P D 04/15/20 12:48PM
  Re: Motobecane D55 Motor TeardownRe: Rebel Moby Rebel Moby 04/19/20 12:19PM
  Re: Motobecane D55 Motor TeardownRe: Brandon Weiss (Detective brandon to you) Brandon Weiss (Detective brandon to you) 04/20/20 09:36AM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 04/20/20 10:11AM
  Re: Motobecane D55 Motor TeardownRe: Ian T Ian T 04/30/20 02:07PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 04/30/20 02:12PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 05/19/20 09:46AM
  Re: Motobecane D55 Motor TeardownRe: P D P D 05/19/20 10:45AM
  Re: Motobecane D55 Motor TeardownRe: Brandon Weiss (Detective brandon to you) Brandon Weiss (Detective brandon to you) 05/20/20 01:26PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 05/21/20 10:47AM
  Re: Motobecane D55 Motor TeardownRe: Brandon Weiss (Detective brandon to you) Brandon Weiss (Detective brandon to you) 05/21/20 12:23PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 06/15/20 10:09AM
  Re: Motobecane D55 Motor TeardownRe: Brandon Weiss (Detective brandon to you) Brandon Weiss (Detective brandon to you) 06/15/20 12:12PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 06/15/20 12:22PM
  Re: Motobecane D55 Motor TeardownRe: Rebel Moby Rebel Moby 06/15/20 10:20PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 06/15/20 11:22PM
  Re: Motobecane D55 Motor TeardownRe: Dirty30 Dillon Dirty30 Dillon 06/18/20 01:01PM

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