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Everything posted by Jaybird180

  1. Steer for the Rear - Ch13 of TOTWII

    I've been thinking about this new chapter (I could almost swear it wasn't in my book before- LoL) and it seems that there's a jewel in there about the bike steering about the rear wheel (once leaned over). And it makes sense to me. But there's a part of me that having a hard time with it and it's the mantra about 40/60 F/R weight distribution and using the throttle properly to arrive at that ratio and NOT exceeding it. Then that chapter goes on to point out that one could lift the front while leaned over and the bike will continue through the corner. I've seen it done many times (on TV, haven't experienced it myself). So if this is the case, why do we care about 40/60? Looking through the forum, I came across another thread where I somewhat asked a similar question regarding roll-on rates...which tells me that I've got plenty to understand about the topic of throttle management.
  2. Just tossing this out if anyone has seen this. I found it on Amazon Video and only intended to watch the first 30mins or so but found myself staying up late to watch the entire 2h 18mins. It was awesome and I thought well put together and showed some of things the behind scenes story of 6 Aliens of MotoGP. One part stands out is the statement (objectionable to me): “A fast rider can learn to stop crashing but a slow rider cannot learn to go fast.”
  3. Steer for the Rear - Ch13 of TOTWII

    MM93 has been seen doing this as well as Aaron Yates.
  4. Steer for the Rear - Ch13 of TOTWII

    I'm sorry that my forum coding skills don't work well with this software (and I can't get into an advanced mode to edit) and I hope that what I was trying to say is clear enough to get me straightened out.
  5. Steer for the Rear - Ch13 of TOTWII

    I considered that section as I thought about this.
  6. Steer for the Rear - Ch13 of TOTWII

    Thanks for the suggestion to re-read some material. I'd come to that same conclusion as I began thinking this through on my way to work this morning. I do need to talk through some things as I read and also some thoughts: In Ch 2, the section on throttle control, one of the margin comments mentions that it's possible to get on the gas too early and cause the bike to run wide. In light of my new understanding of what the rear does in a corner, in that it's the dissimilar circle size on the side of the rear tire that causes the bike to turn I now ask :does the (greedy) application of throttle really cause a bike to run wide while leaned over? We already have observed that we can lift the front with throttle and the bike will remain as sure as if on rails. Ch 2 also give the reason for the idea behind the 60/40 and that it's based on a comparative measurement of footprint, nothing more. 0.1-0.2g of throttle is what's needed to maintain that relative contact patch. But since we now understand that size of contact patch isn't the determining factor in available traction should maintenance of footprint still be a Primary concern as requested by Ch2? I'd like to make a note here: I'm not advancing an idea of "whacking" open the gas, nor am I saying that a smooth roll-on isn't the right thing to do. I am saying that perhaps we needn't be as gentle with the throttle as I previously thought. If this is really the case, then perhaps I opened a door for more available attention for other things. I hope I'm not opening the door to more highsides. 3. Donny Greene in his comment at the end of Ch 3 says it this way: "Once you have the throttle control rule firmly understood and practiced and you can get the rear wheel spinning with a smooth roll-on, your bike will handle again." What if instead of spinning the rear, you time your roll rate so that the tire is hooked up and driving forward? I can see a viable reason to want to use a spinning rear wheel to help finish the corner, but it might be too much mid-corner even if it does work just fine for Casey Stoner.
  7. Development

    Still haven't found it yet, but you can chew on some of this data. maybe copy/paste into a spreadsheet??? https://www.sportrider.com/tech/sportbike-performance-numbers
  8. Steer for the Rear - Ch13 of TOTWII

    This is pure speculation but I'd imagine that the front wheel begins to lift at a point well above 60% weight distribution. But if you could instead find a balance point where all of the power being used it for propulsion than lifting the front wheel, where would that be in relation to the ideal 60%?
  9. Steer for the Rear - Ch13 of TOTWII

    One the bike is on trajectory, we don't need the front anymore. The rear tire can support the full weight of the rider and bike combination. The power applied extends the suspension and yes the load to the tire increases. Fortunately, friction is directly related to load applied so therefore the load resists the tire sliding. Assuming we're talking about fresh rubber and not concerned about longevity, why do we care about having 40% of the load on the front. Why not get the power to the ground to the maximum that it translates into forward motion?
  10. Development

    There’s an article with an objective performance data comparison of vintage vs modern sportbikes. Maybe later today I’ll see if I can find it again.
  11. Development

    Is this what you meant?
  12. Development

    There was a magazine that did a comparison like this....I saw something about it online. Maybe I can see if I can find it.
  13. HP4 Race

    See one!???....you tease! I'll bet you rode it didn't you....!??? And don't lie to me cause, I'll find you.... j/k :-)
  14. That would look like me getting out of the driveway - LoL
  15. Steering Video No Bs Bike

    The bike on ice was very interesting...and funny The last video...what made it change direction like that? This is why race bikes should always have a dead-man switch.
  16. Steering Video No Bs Bike

    @Dylan CodeAt what venues and levels are students invited to ride the No BS bike?
  17. Keith, CSS and 1990

    My....how things have changed in 27 years
  18. I’ve seen drag bikes where the front end is strapped, effectively keeping the suspension compressed and to prevent rebound. What are they trying to accomplish by doing this? I’m discussing this on another forum and proposed that: 1- I don’t know why 2- There are other, more effective ways of doing the above without the risk of a strap failure or the cost of modification Anyone?
  19. Limitations of CSS techniques?

    Nice bike! Last week my wife bought a 1992 CB750 that had been well cared for.
  20. HP4 Race

    I just saw a review of the bike. Very nice! $78,000 though and only 750 will be made. I’m wondering if it will be WSBK legal and gridded since they’re making over the 500 homologation minimum.
  21. Dirt vs Asphalt riding styles and technique

    The most intense corner-workers I think ANYONE has ever seen! Thanks for the video. Yes, clearly there is a difference in styles. I'm wondering if it's a matter of machine design that makes the style difference more pronounced. For example on my dirt bike the other day, I noticed that it seems the designer wanted me to ride the front as there's a dip in the seat, like the dip in a two-hump camel. My long arms means I've got a short reach to the bars and therefore my steering isn't perpendicular to the steering head, almost a downward action. Conversely, the reach to the bars on my sportbike is further forward, causing me to lean in and requiring a distinct steering action to get agility from the bike. Where I place my weight seems a secondary effect of the bar input requirements. I'm wondering if this has some bearing on the counter steer vs counterweight debate....but I digress...
  22. I'm having a good time riding my new dirt bike. It's a first for me being on such a machine and I'm finding a lot of similarities to hard surface riding. I have a quick question from watching some motocross and hope someone can answer about some of the dissimilar things I've found: Dirt riders tend to push the bike underneath in a "crossed up" style vs asphalt riders want to go with the bike or even "hang-off" in the direction of the turn. Why? Dirt riders seem to not care about "racing lines". I'm not talking about situations where the rider is following a rut as that's understandable that you can't cross a 16" rut just to run a line, but they seem to not care about outside-inside-outside of turns like asphalt riders do. Why?
  23. Long interval between levels 1 and 2 schools

    There can be wonderful gains for sense-of-self when you plan a stable goal and arrange the dangling participles of life to meet that goal. Book your date, no matter how far out, be mindful of the date and watch how your life's arrangements accommodate. Cheers
  24. Knee slider as a learning tool... Why? When? How?

    Here's a related article I read yesterday http://www.motorcycle.com/features/Marc-marquez-crazy-save-motogp-sepang-2017
  25. LoL- posted before I could LoL