Dazzo92 Posted October 22, 2020 Share Posted October 22, 2020 Hey all hope everyone's riding safe with weather getting bad...... But yeah to my question what could cause the plastics inside a speedo drive to melt? Yes I know its friction blah blah blah but for it to proper melt like butter to the point my wire has a new casing now is that just poor quality drive? Quote Link to comment Share on other sites More sharing options...
iangaryprice Posted October 22, 2020 Share Posted October 22, 2020 Yes your right about the friction. The question iis what caused the friction. All moving parts have some friction. When they are working correctly the friction is minimal, hence the heat generated from the friction is also small, so they may get warm but not hot. Something will have gone wrong with the speedo drive to increase the friction.Possible causes are lubrication - no grease or water got in. Corrosion, causing the moving parts to get tight, hence more force needed to move them, so more heat - Broken part - won't rotate freely, again more force, more heat.Plastics don't like heat, some can't even cope with boiling water (100degC), heat resistant plastics can deal with 200degC plus.Go past thier temperature limit and the effects are very noticable - as you have seen. Quote Link to comment Share on other sites More sharing options...
Dazzo92 Posted October 22, 2020 Author Share Posted October 22, 2020 Yeah I get you.... I just got it motd also while that was done they replaced front tyre bairings I dunno what they done (this broke while on way home from mot) my first thought after inspecting the bike was it was put on too tight then over greased as it was oozing but they heat also could of thinned the lubricant they used? Quote Link to comment Share on other sites More sharing options...
Tiggie Posted October 22, 2020 Share Posted October 22, 2020 What bike is it? could be a known fault with that model Quote Link to comment Share on other sites More sharing options...
Dazzo92 Posted October 25, 2020 Author Share Posted October 25, 2020 It's a zontes panther 125 2016 model..... Heads banging off everything as I fix one thing then another thing goes the joys of projects, now the brake light wont turn off everything seems to be in order no jams broken wires just abit annoying haha Quote Link to comment Share on other sites More sharing options...
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