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CAN wire length

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I have an M84 Motec and the Plex dash i use will be about 4 metres from each other , the plex has about 2.5 metres of swisted wire to the plug , can i make a simple “ extension” lead ( twisted ) to give me the right length

I have read some where ( but can’t now find it ) that the CAN wire length is limited

my project is a 4 metre long land speed bike —- hayabusa powered

The short answer is yes. According to this page, a 1Mbit/sec can bus may be up to 25 meters long.