Re: 1976 Motobecane 50 stalls when it gets warm

Rebel Moby /
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Best plan for the condenser is to upgrade to a external mounted condenser. If you scored yourself a stock condenser you can mount it on the back of the Novi 120x magneto (look on the back of the plate and use a small self tap screw). OR you can use a mid-1960s GM-Delco 6 cylinder (or similar vintage VW-Bosch) condenser and mount it to the lower external coil's mounting stud. Any of those you just need to splice the pigtail into the grey wire that goes to the external coil, then disconnect the blueblack wire going from the original condenser to the points.

While inside the magneto it is a good opportunity to clean and gap the points at index to 0,4mm and set the timing to 1,5mm BTDC.

You would also want to ward off other electrical issues by replacing the bonding strap that goes from the upper engine mount long bolt to the external coil. Fabricate a new wire to go from one of the intake studs to the lower stud of the external coil. This will provide a good electrical bonding (common or ground) between the motor and the bike.

If you scored a SHA15:15 then get your self a 60 or 62 jet for it as well as the 15mm intake. Putting the 15mm carb on a stock intake will be hell to tune and give more troubles than you want to get it set up. The 15mm intake you will likely need to derestrict the area where it transitions from round bore to rectangle, it necks down in that area and you need 15mm through the entire round part.

Get a 11/16 X 13/16 X 1/16 oring for the union between SHA and intake manifold to ward against vacuum leaks.

I would also suggest to get a new crush washer for the exhause, and remove the exhause so you can clean it and the exhause port window. You always need to use a new crush washer to reinstall the exhause, and after it is installed take the bike for a goodly run and check the big nut it right tight while the engine is cooking hot. If the big nut is not well secured then the vibrations of the motor can loosen the nut and it will ruin the threads in the cylinder.

> Phil Burtner Wrote:

> -------------------------------------------------------

> Thanks guys! New condenser on the way (Treats has an 18% off sale right

> now!).

>

> Side note, I was chasing the carb adjustment route (I thought it was

> running lean and getting too hot), so I bought a Delorto 15.15 for it.

> Should I install that as well? My main goal is RELIABLE performance,

> not necessarily more speed.

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Subject Written By Posted
  1976 Motobecane 50 stalls when it gets warmTopic by: Phil Burtner Phil Burtner 10/23/19 08:23PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Phil Burtner Phil Burtner 10/23/19 08:25PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Aaron Blair Aaron Blair 10/23/19 09:19PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Stephen Keller Stephen Keller 10/24/19 03:39AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Rick Bergsma Rick Bergsma 10/24/19 06:23AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Phil Burtner Phil Burtner 10/24/19 07:17AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Rebel Moby Rebel Moby 10/24/19 10:15AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Phil Burtner Phil Burtner 10/28/19 11:55AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Rebel Moby Rebel Moby 10/28/19 03:42PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Phil Burtner Phil Burtner 10/29/19 08:16AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Rebel Moby Rebel Moby 10/29/19 10:08AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Phil Burtner Phil Burtner 10/29/19 02:01PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Rebel Moby Rebel Moby 10/29/19 04:52PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Phil Burtner Phil Burtner 10/29/19 07:26PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Rebel Moby Rebel Moby 10/30/19 09:22AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: P D P D 10/30/19 10:51AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Stephen Keller Stephen Keller 10/29/19 03:21PM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: * * * * 10/31/19 02:12AM
  Re: 1976 Motobecane 50 stalls when it gets warmRe: Silverfox Sullivan Silverfox Sullivan 10/31/19 05:38PM

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