There's one rule that governs more of your cornering than everything else combined. The moment you start adding gas in a corner, you keep adding it — smoothly, steadily — all the way to the exit.
Of every technique in this book, one earns its own law. It's the cure for the master error you met in Chapter 1 — chopping the throttle — and it's the closest thing riding has to a magic word. Get it right and the bike settles, plants, and steers itself. Get it wrong and it goes nervous under you.
Keith Code calls it Throttle Rule #1, and he means rule literally: not a guideline, not a preference, but the single habit your whole cornering hangs from. Control of the motorcycle starts at your right wrist.
This chapter is about that wrist. What the rule says, why a steady roll-on is the bike's happy place, what the chop actually does to the chassis, and how to make a smooth roll-on the thing your hand does without being asked.
Here it is, plain: the moment you start adding gas in a corner, keep adding it — smoothly, steadily — all the way to the exit. That's the whole thing. You don't hold it flat, you don't pulse it, and you absolutely never close it back down. Once the gas is on, it only ever goes one direction: open.
Code states it as a law, word for word:
That single sentence is the master skill. Everything else in cornering — your line, your lean, your eyes — gets easier when the throttle is doing this, and harder when it isn't. So before we touch anything else, we lock this in. Control of the motorcycle starts at your right wrist.
So why does one rule about your wrist matter this much? Because a steady roll-on parks the bike's weight exactly where it wants to be: roughly 40% on the front wheel, 60% on the rear. That's not a random number — it's the balance the motorcycle was designed to corner on.
When the weight sits 40/60, two good things happen at once. The suspension settles into the middle of its travel — not topped out, not bottomed out — which is the zone where the fork and shock can actually absorb bumps and keep the tires pressed to the road. And both tires flatten into the pavement under load, giving you their biggest contact patch, which is just another way of saying the most grip available.
That's the payoff. A constant roll-on isn't busywork for your hand — it's what holds the chassis in the one attitude where the suspension works and the tires grip. The rule and the happy place are the same thing seen from two ends.
Now the dark side. Roll off the throttle mid-corner — snap it shut, even a little — and you tear the bike out of its happy place in an instant. The engine stops driving the rear, the bike decelerates, and all that weight you had nicely balanced lurches forward onto the front wheel.
The fork dives. The front compresses toward the bottom of its travel where it's stiff and harsh. The rear goes light — and a light tire is a low-grip tire, so the rear's grip shrinks right when you're leaned over and counting on it. The bike runs wide or feels like it's about to step out, and your instinct is to chop more, which only digs the hole deeper.
You've met this before. This is Survival Reaction #1 from Chapter 1 — the hard-wired flinch that snaps your wrist shut when a corner surprises you. Throttle Rule #1 is its exact antidote: the trained move you drill until it beats the flinch.
If a steady roll-on is the happy place, you want to get there as soon as you reasonably can. That's the companion law: as soon as you've finished steering the bike into the corner, crack the throttle on. Code calls this Throttle Rule #2 — and it's really just Rule #1's start gun.
The logic is simple. The bike is unsettled while you're still turning it in and coasting; it becomes settled the instant you begin rolling on. So the sooner you're on the gas, the sooner you're stable, and the more of the corner you spend in the good state instead of the nervous one. Finish your steering input, then go to the throttle — don't dawdle in the coast.
"Early" doesn't mean "violent," and it doesn't mean before you're done steering. It means without hesitation: the moment the bike is pointed where you want it, your hand is already feeding in smooth, gentle gas.
Here's the part riders get wrong most often: Rule #1 is about smoothness and continuity, not speed. "Roll it on" does not mean "gun it." A gentle, even, constant feed of throttle beats a hard stab every single time — and it's not close.
Think about what a stab does. A sudden fistful of gas spikes the rear, breaks the smooth weight transfer, and asks the tire for a chunk of grip all at once while you're leaned over. The rule isn't asking for more gas; it's asking for an uninterrupted, predictable rise. A slow, steady roll-on that never wavers will carry you faster and safer than any aggressive twist.
The picture to hold: imagine a string tied from the corner exit to your wrist, drawing the throttle open at a constant, unhurried rate. Not a jab. A draw. Smooth is the whole point — and, as the next-to-last section shows, smooth turns out to be fast anyway.
Here's the idea that reframes the whole rule: your throttle hand is, in effect, a suspension control. Where you hold the throttle decides how the bike sits — its attitude, its ride height, how compressed each end is. And how the bike sits decides how it steers and how much it grips.
Walk it through. Throttle closed → weight forward → front squashed down, rear extended → the bike's nose drops, the steering gets quicker and twitchier, the rear light. Steady throttle on → weight settles to 40/60 → both ends at a sane ride height → the steering geometry is the calm, stable one the bike was built around. You didn't touch the suspension adjusters. You changed the geometry with your wrist.
That's why Rule #1 punches so far above its weight. A smooth, constant roll-on isn't just "going faster" — it's actively holding the chassis in the attitude where the steering is predictable and the grip is maximized. Chapter 4 (the Traction Pie) shows the grip side of this ledger in detail; here the takeaway is simpler: the throttle sets the bike's posture, and the posture sets everything else.
Print this in your head. Tab one is the law itself — Rules #1 and #2 word-for-word, with the cues that trigger them. Tab two is what a good roll-on actually feels like, annotated mark by mark.