I've had a similar experience with the rear springs to you rob_macca67. Started out at 830mm on day of installed and quickly settled to 815mm. Now sits at 805-810 with full tanks. I have no issue with the rear height at the moment but will if it sags further.
The fronts have been 765-770 since installed.
The fronts have been 765-770 since installed.
Snaga
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