Hi,
why is an 87 spur too big for a 6.5 motor???
I run a 7.5 indoors geared on a 24 pinion with a kit 87 spur.
You can quite easily gear a 6.5 on a 23/24 pinion with the kit spur.
If you're wanting to use a smaller spur on a 6.5, then you will be over geared.
Craig.
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