I'd probably have expected the chain on the 150 to be slightly smaller than 520, but I can't remember to be honest.

I use a split (spring) link on my MC21 with no issues. It's not changed a lot, but it would be a pain in the ass to have to rivet a new link each time it was changed. A 150SP certainly isn't going to stress a 520 chain/split-link if that is indeed the size required, and a split-linkmakes the job a hell of a lot simpler and quicker.

A Pro-Arm can only make the job of replacing a chain even easier in my opinion.
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Andy.
NSR-WORLD.COM

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