{"id":3051,"date":"2025-01-04T13:29:58","date_gmt":"2025-01-04T12:29:58","guid":{"rendered":"http:\/\/springbok-kart.com\/?page_id=3051"},"modified":"2025-07-25T06:36:45","modified_gmt":"2025-07-25T05:36:45","slug":"frein-a-disque-sur-le-proto-motobecane-av79-de-1957","status":"publish","type":"page","link":"https:\/\/springbok-kart.com\/?page_id=3051","title":{"rendered":"Frein \u00e0 disque sur le Proto Motob\u00e9cane AV79 de 1959"},"content":{"rendered":"\n
\"\"<\/a><\/figure>\n\n\n\n

Cette fin d’ann\u00e9e 2024, le proto a pris environ 350km lors des diff\u00e9rentes sorties. Ce n’est pas beaucoup mais j’ai plusieurs mobs \u00e0 faire rouler et celle-ci n’est pas des plus \u00ab\u00a0confortable\u00a0\u00bb. De plus \u00e0 l’usage les freins ne sont pas adapt\u00e9s aux capacit\u00e9s du moteur et au poids du pilote. Plusieurs fois je me suis retrouv\u00e9 en difficult\u00e9 en cas de freinage d’urgence \u00e0 grande vitesse.<\/p>\n\n\n\n

J’ai donc entrepris d’installer un frein \u00e0 disque \u00e0 l’avant tant pour l\u2019esth\u00e9tique que pour la s\u00e9curit\u00e9.
Je souhaite conserver la fourche d’origine m\u00eame si cela complique bien l’adaptation. Les fourches invers\u00e9es sont d\u00e9j\u00e0 \u00e9quip\u00e9es de l’emplacement pour fixer un \u00e9trier mais visuellement ces fourches plus modernes ne sont pas adapt\u00e9es \u00e0 l’allure g\u00e9n\u00e9rale du Proto. Donc il va falloir fixer l’\u00e9trier sur la patte au bout des plongeurs.<\/p>\n\n\n\n

On fait quelques essais \u00e0 blanc avec des morceaux de carton. Le disque sera un 180 mm, le 210mm d\u00e9porte trop l’\u00e9trier et n’est pas esth\u00e9tique.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

La position de l’\u00e9trier sera \u00e0 l’arri\u00e8re du plongeur et au dessus du hauban du garde boue. Le choix de l’\u00e9trier est restreint car il me faut un mod\u00e8le pas trop encombrant qui puisse tenir dans ce petit espace. J’ai choisi un kit de frein pour mini moto avec un \u00e9trier flottant sur Aliexpress.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

Ensuite il me fallait un disque d’une taille adapt\u00e9e et pas trop moche. J’ai choisi ce mod\u00e8le avec un al\u00e9sage de 40mm<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Voici le dessin de la pi\u00e8ce la plus importante qui permet la fixation de l’\u00e9trier sur le plongeur droit de la fourche. \u00e0 d\u00e9couper et percer dans une t\u00f4le d’alu de 6mm.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

Pour fixer le disque j’ai tourn\u00e9 une flasque d’alu emmanch\u00e9e de force et coll\u00e9e \u00e0 la place du tambour de frein. <\/p>\n\n\n\n

D\u00e9montage complet de tous les joints et pistons de l’\u00e9trier et de la pompe. Passage \u00e0 la peinture \u00e9poxy vermicul\u00e9e et mise au four \u00e0 230\u00b0C pendant 20 mn.
Il faudra que je vous parle de ce proc\u00e9d\u00e9 de peinture \u00e9lectrostatique, qui a beaucoup d’avantages pour nous les bricoleurs \ud83d\ude42
Remontage avec une petite fantaisie sur le couvercle de la pompe qui m’a pris 1\/2 journ\u00e9e tout de m\u00eame.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

Conclusions:<\/h2>\n\n\n\n

Pour quelques dizaines d’euros on a un syst\u00e8me de frein plus moderne.
M\u00eame si le freinage s’est am\u00e9lior\u00e9 c’est loin d’\u00eatre suffisant comme force de d\u00e9c\u00e9l\u00e9ration, il faudrait un \u00e9trier plus gros mais c’est incompatible avec la fourche et le peu de place dont on dispose, donc c’est un compromis.
Cot\u00e9 esth\u00e9tique cela me convient en restant dans l’esprit n\u00e9o-r\u00e9tro du projet.<\/p>\n\n\n\n


Pour ceux qui veulent faire la modification sur leur monture je pense que le plus difficile sera peut \u00eatre de trouver un tourneur de bonne volont\u00e9 pour faire usiner la flasque qui prend la place du tambour et sur laquelle on fixe le disque. Vous avez le plan pour le support de l’\u00e9trier qui demande un peu de patience pour la d\u00e9coupe de l’aluminium avec une scie sauteuse et une lime . Le reste n’est que de l’assemblage.<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Cette fin d’ann\u00e9e 2024, le proto a pris environ 350km lors des diff\u00e9rentes sorties. Ce n’est pas beaucoup mais j’ai plusieurs mobs \u00e0 faire rouler et celle-ci n’est pas des plus \u00ab\u00a0confortable\u00a0\u00bb. De plus \u00e0 l’usage les freins ne sont … Continuer la lecture →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3051","page","type-page","status-publish","hentry"],"yoast_head":"\nFrein \u00e0 disque sur le Proto Motob\u00e9cane AV79 de 1959 - Springbok kart<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/springbok-kart.com\/?page_id=3051\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Frein \u00e0 disque sur le Proto Motob\u00e9cane AV79 de 1959 - Springbok kart\" \/>\n<meta property=\"og:description\" content=\"Cette fin d’ann\u00e9e 2024, le proto a pris environ 350km lors des diff\u00e9rentes sorties. 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