Jim Snell explains Trials thermostats, thermostatic switches, cooling fan motors and rectifiers.

Jim explains how the cooling fan motors, their AC/DC power supply, and the basic "series circuits" work in the modern trials motorcycles. - Turns-on at 70°C/158F ~ Turns-off at 60°C/140°F

[@reyesgonzalez1816]

Thanks Jim, I had to replace the old thermostats of my gas gas. And I used some like that red that you show in the video. A greeting from Spain

[@enhancesoutheast5964]

Great overview here.. Good technical video..

[@alexandrearbex3822]

Excelent video Thanks.

[@jonboy1324]

Jim great explanation of how it all works, will the one you sell to fit in the water hose fit a beta Evo junior ( medium wheel )

[@bartmaenhoudt3122]

just an question, if i untherstand it right does AC comes in the thermostat, and then rectified, and not DC in and directly to the fan ? so do the lights need an extra rectifier ?

[@TRIALSPARTSUSA]

Lights are A/C, fan is D/C. It doesn't matter if t/stat is on A/C before rectifier or after rectifier, it just turns the fan off and on

[@Holstech]

Love your videos Jim. What temp range is the thermo switch?

[@TRIALSPARTSUSA]

Turns-on at 70°C/158F ~ Turns-off at 60°C/140°F

[@HoldenPower]

@@TRIALSPARTSUSA Hi Jim. Is there a way to just get rid of the thermostat and have the fan running all the time while engine is running?

[@HoldenPower]

@@TRIALSPARTSUSA Bikes a 06 gasgas 280 pro

[@TRIALSPARTSUSA]

@@HoldenPower you can do that... but.... then you have an engine that has no temperature control. It will take a lot longer to come up to proper operating temperature and run cleanly, and it can run too cold for long periods which effects carburetion. I think that ultimately, you will dramatically shorten the life of the fan motor.