Okay. What to repair, what to replace and what to upgrade?<\/p>\n
This section is a recent invention, intended to house thoughts on what to do better than what Honda’s engineers could offer in 1973. Without breaking the bank.<\/p>\n
The engine is largely original, meaning it sports a choked-down, respiration-abused abomination of a cylinderhead to fit danish moped-regulations anno 1973. The cylinderhead and the accompanying cylinder are a matching 50cc-set, further reducing my desire to press the kit into service as a motorcycle powerplant basis. Also, the cam sports no ball-bearings and is worn.<\/p>\n
Easy decision; new 70cc top end sporting a ball-bearing equipped camshaft, larger valves and an unrestricted respiration. Drop-in-replacement. From China.<\/p>\n
Should the need arise down the line, a proper OE topend could be an upgrade.<\/p>\n
Yes, I know. THere are lots of big-bore-kits out there. Four-valve upgrades, High lift cams. LOng list, and I choose to not go that way. This is not going to be a race engine, but an upgrade to what the engine was meant to be – which is NOT 50cc choked-down moped-material, but a mini-motorcycle.<\/p>\n
Safety first.<\/p>\n
I’ve lived with the crummy 6V system back then because then there was no alternative. To say the headlight is insufficient is a simple understatement. Here, Jeremy Clarksons exclamation “POWER!!” fits right in. Bigger bulb. Newer reflector. More power. 12.<\/p>\n
I lived with the mechanical points system for the same reason. No more. The OE system has to go, being replaced by a properly advancing CDI. Again, danish authorities in 1973 mandated that the OE ignitition be ‘frozen’ solid to limit the engine to – wait for it – 1 bhp<\/strong> by abusing the ignition to prevent it revving properly.<\/p>\n Also, there’s the subject of comfort and reliability. I’ll let you come up with your own arguments in favor of mechanical points…<\/p>\n The OE clutch was failing. Worn plates. I’ve replaced the unit – and the driven gear – with a Takegawa heavy duty race clutch. And regretted it. Crappy stuff, making me wish for the old clutch.<\/p>\n For starters; why supply me with a steel bearing sleeve when the OE is bronze? And the plainly apparent crude manufacture finish made me think this was a ‘single use’ object. Oh well, let’s give it a chance to prove its worth…<\/p>\n No. It needs to go. It sticks. And for lack of better words it’s ‘blunt’. No refinement. No smoothness. And an unpleasant ‘klonk’ and whine making my ears hurt.<\/p>\n","protected":false},"excerpt":{"rendered":" Okay. What to repair, what to replace and what to upgrade? This section is a recent invention, intended to house thoughts on what to do …<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":49,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-56","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/pages\/56","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/comments?post=56"}],"version-history":[{"count":0,"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/pages\/56\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/pages\/49"}],"wp:attachment":[{"href":"https:\/\/www.martinfiltenborg.dk\/mechanicality\/wp-json\/wp\/v2\/media?parent=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}New clutch<\/h2>\n