How do I time the AP on my WR400?

I'm getting a nasty off idle bog on my '99 WR400. I've set the fuel screw and before I go messing around w/my jets etc.. I wanted to check the timing on the ap. I cant find anything specific in my Clymer book and I dont have the original manual. Help would be appreciated.

The goal is to adjust the pump timing screw so that the stream from the a/p does not hit the slide when it is raising but doesn't miss it my much either.

Thanks, that's the info I needed

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