How can i get my sportbike front end planted under hard braking?

[Paisley_W]

I’ve been trying to dial in the suspension on my sportbike for track days, but I can’t seem to get the front end to feel planted under hard braking. My sag is set correctly and I’ve played with compression and rebound, but it still feels like it wants to chatter or push a bit.

[ScottH]

Yep, I’ve chased that exact feeling. Sag was fine, but under hard braking the front would chatter and the nose felt like it wanted to dive more than the tire could hold. I tried small tweaks to the fork oil height and bumped the high‑speed compression a notch, plus a slightly stiffer front spring to punish weight transfer less aggressively. It helped a bit, but I never felt truly planted until I stopped chasing the numbers and checked the tires and brakes for other limits.

[Kenneth.G]

I wonder if the tire is the bottleneck. Front chatter and a push can show up when the tire is overheating or underinflated for the track. I once found that keeping the tire pressures in a steadier range through the session softened the front feel a bit.

[Nora_T]

Could it be the damper itself? I had one fork behaving differently on the same bike and it would rebound oddly after braking, almost like a valve stuck open. I swapped the cartridge and it tightened right up, but not everyone has a spare to swap in at a track day.

[Robert_T]

One quick question: are you measuring sag with the bike static and then with the rider on and on the brakes?