Tractive force curves are all you should really care about anyway. This arguing over the relationship between HP and torque is just noise in the face of such data.
Change fork oil, maybe use heavier weight oil. Swap out the fork springs for properly sized ones for your weight. Problem solved. That is if it is the front that is the issue. Easy way to check is get off the bike while holding the front brake and just bounce the front.
Sounds like a maladjusted chain, with the chain skipping teeth everyone once in a while. Maybe a worn sprocket(s), though I find that hard to believe on a 125.
All suggestions are rated:
- = Idea or feature considered bad for LFS or not possible/feasible to implement.
... = Hard to tell...
+ = Idea or feature considered good for LFS
Braking acceleration in LFS (and real life) is limited by one thing: grip. Using engine braking in conjunction with normal braking does not magically increasing the braking acceleration unless you have really weak brakes to start with that are not capable of locking the wheels on their own.
Been living under a rock, eh? Gameplay-wise, it just feels a lot better to me than MW2, very direct. MW2 feels very disconnected by comparison, like there's a small lag to everything you do, despite very high framerates (C2D E8400, GTX480, 6GB RAM). Think LFS vs. rFactor. I happened to hop on a CS:S server for the first time in years a few weeks ago and was blown away by how much I felt at home and the responsiveness of the controls.
I think the really hardcore guys play CS 1.6, though.
Still a stuttery mess for me after the latest patch that supposedly increases performance on dual-core CPU's. I run around at a solid 60 fps, then meet up face to face with an enemy and it drops to 5 fps.