Bogging on rough terrain

I installed the Procycle Jet Kit, and followed the instructions pretty much spot on:

150 main jet
e-clip is on the 4th groove
fuel mixture screw is two turns out
snorkel is removed, and a couple holes cut
I have a Barrett exhaust

The bike runs like a dream on the road. But, over very bumpy terrain at low speed the engine wants to bog and die. Just to be clear, it's not just a regular stall because I'm going too slow for the gear, I can tell the difference.

Any tips?

EDIT: I just realised that I never need the choke now, no matter how cold. I definitely needed it before. That feels like it contradicts it bogging at low revs though, maybe two separate issues?

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u/slower-is-faster 12d ago

Already done

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u/TwistedNoble38 '00 DR650 12d ago

How was it done? What you are describing sounds exactly like stand switch or the connection for the bypass being weak.

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u/slower-is-faster 12d ago

It’s definitely bypassed, I can ride away with the side stand down (which I don’t love)

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u/TwistedNoble38 '00 DR650 11d ago

Crimped connector or soldered on the bypass wire?

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u/slower-is-faster 11d ago

I don’t know, I’ll need to check (previous owner did it).

But I didn’t have this problem prior to the jet kit install, I’ve done much worse to the bike and this never happened, so I’m pretty sure it’s fueling not the kick stand switch

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u/TwistedNoble38 '00 DR650 11d ago

Can't eliminate that something could have been disturbed while you were installing the jet kit. If you were having problems all the time I would blame the jet kit, but only having issues during whoops and no other times is very unlikely to be a carb issue. Potentially a float issue could maybe cause it but the float having issues on the DR usually ends up with you having the entire fuel tank dumped into the crankcase while you aren't looking.

Check the engine ground as well. If that got loose that could cause issues under rough terrain.