Before Fitting Samios-Remapped Ecu

[fixitsan]

I looked back on that thread briefly and was going to ask about the 4° advance then remembered it was for a 9er, is it the same for a 4TX and what was involved?

I'd like to give it a go but being a tightwad I'd rather ask someone that's done it than buy a gasket just to look. 

 

Very wise plan.

 

It's almost identical on an 850, this is a picture for the 900.

You need to remove the pickup coil and slot the mounting holes sideways, in the direction of the red lines in the image. I think I worked out that moving the pickup 1mm sideways gives a noticeable improvement a bit under 4 degrees, maybe 1.5mm is about your limit.

It needs to move in the opposite direction to the rotation of of the rotor in order to advance the timing

When drilling/dremelling the mounting holes sideways, wrap the pickup in self adhesive tape first, to keep the magnetic steel shavings off the face of the pickup coil, removing it again before testing.

 

 

 

Stats3red by Chris Barron, on Flickr

This post was last modified: 27-03-2026, 10:23 PM by fixitsan.