Just swapped my plug for a brand new iridium.

Checked the gap, was within spec.

About 1,000 miles in, and now my idle speed seems weird?

Clock reads tick over at 1400 rpm, but it seems lower, almost like it's about to stall.

Twice now, it has stalled on me, on change-up from 1st to 2nd.

Also, if I'm in the low rev range of just between engine braking and accelerating (ie, just enough to keep rolling) it seems very stuttery... like the chain is snagging (but it's not)?

I'm pretty sure the only thing I've done lately is change the plug?

Any thoughts?

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Bike: 2013 XT660Z, TKC70 tyres

Mods:
Barkbusters, Scottoiler, DIY Tail Mod, DNA Stage 3, Power Commander V & O2 Eliminator, Exan X-Black Stainless exhaust, Tool tube, Ohlins linear front fork springs, Nitron rear shock, JT front and Supersprox rear sprockets, D.I.D. VX 520 chain, Adventure Spec bashplate, DIY USB Outlet, DIY chain guide, Kev's Throttle mod

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