Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: billdn on December 27, 2021, 08:57:17 AM

Title: Soldering temperatures.
Post by: billdn on December 27, 2021, 08:57:17 AM

Santa bought me a new soldering iron, as I'm doing some electrical work but unlike my old one this has a variable temperature gauge. For routine joining /changing bullets and connectors what would be ideal temperature in centigrade?
Nice to have the choice rather than just get the point hot! , like my old Halfords cheepie.

Title: Re: Soldering temperatures.
Post by: zombie365 on December 27, 2021, 10:34:38 AM

Electronic engineer here. I usually set my iron to around 420c.

Title: Re: Soldering temperatures.
Post by: AshimotoK0 on December 27, 2021, 01:09:17 PM

Depends if you are using lead-free or not.

If you are working with 60/40 lead solder (which I would recommend for old Hondas)  then 350°C should be OK. 420°C 'ish for lead-free.

Don't solder any old Honda stuff (that's had solder on it already) with lead-free as you will get a very dull and inferior joint.

Title: Re: Soldering temperatures.
Post by: billdn on December 28, 2021, 06:45:44 PM

Cheers guys.!

Title: Re: Soldering temperatures.
Post by: AshimotoK0 on December 31, 2021, 10:15:15 AM

Also worth getting some non-corrosive flux paste if soldering old bike electrical parts.
It's often quite difficult soldering old wired parts as the conductors were bare copper on Honda's , so after 50 years can be hard to solder. I usually splay out the strands and clean up by scratching with a scalpel blade and then re-twisting and dipping in flux to aid tinning. Of course new wire is the best solution but not always practical to replace.

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