cht gauge

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
GeorgeS
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Posts: 254
Joined: Fri Feb 27, 2015 1:58 pm
Main scooter: 1961 Series II Granturismo 240
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For the 'what temp should I be seeing' question I'd say it very much depends on your own scooter, the set up & (mostly) where you've got the sensor.

For my own GT240 I've drilled & tapped the centre of the head (where the unfitted centre sparkplug gap is) so the sensor is very close to the heat source. Because of that I will usually get 220c+ but also get a near-instant reading on temp changes. For me, I want to see the temp dropping quickly if you lay off the throttle or reach the top of a hill, if it keeps rising or is unusually high I'd get worried.

Those red under-the-plug sensor holders are shite, I've found they disintegrate over time & then you're potentially left with a air leak under your plug, so much prefer it fitted to a fin or in the head, or something along those lines. It's an unusual 4.5mm thread if I remember correctly.

I found once fitted you get used to what temps are normal for you & will know when something feels wrong. It does give you something extra to worry about, but it's worth knowing :)
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