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Jaybird180

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Everything posted by Jaybird180

  1. 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.
  2. 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.
  3. 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
  4. 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%?
  5. 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?
  6. 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.”
  7. 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.
  8. Development

    Is this what you meant?
  9. 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.
  10. 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 :-)
  11. That would look like me getting out of the driveway - LoL
  12. 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.
  13. Steering Video No Bs Bike

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

    My....how things have changed in 27 years
  15. 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?
  16. Limitations of CSS techniques?

    Nice bike! Last week my wife bought a 1992 CB750 that had been well cared for.
  17. 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.
  18. 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...
  19. 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?
  20. 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
  21. 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
  22. LoL- posted before I could LoL
  23. This past weekend, my bride and I took our new enclosed trailer on its maiden voyage to Virginia International Raceway to participate in a trackday with Aaron Stevenson's Cornerspeed riding school. I've wanted to do his school for about as long as I've wanted to do CSS- just that I committed to CSS first. To add to my sense of urgency, Dave Moss was scheduled to be there and since I had already been watching his videos, etc and corresponding with him about a problem with the forks I'd upgraded I decided HECK YEAH! Little did I know that an additional bonus would be that Tom Kipp would be there. I didn't know much about him, so after I got home I looked into his racing career to discover that he has 4 AMA Supersport crowns on his resume; he's now retired from racing and according to what I read is now a preacher. During one of the classroom sessions, Tom offered to tow me around the circuit. Unfortunately we got separated by Tom getting around a slower rider and it took me a bit longer to catch up...and then he turned up the pace a little...a little too soon for me as I didn't have enough attention for my RPs and watching Tom's lines. I also had an opportunity to ride 2-up on the back of Aaron's prepped GSXR with a passenger hold on the tank. THAT was a HOOT! I haven't been on the back of a motorcycle since I was 5 and I'm a long ways from 5 years old. We took off and Aaron immediately pulls a power wheelie from pit road getting onto the front straight to join T1. What's notable for me was that I could really feel each time when the front wheel wasn't in contact with the pavement and also when he set it back down and it wasn't in-line with our direction of travel. Aaron was braking in places where I could only dream of doing the same. He knows ViR very intimately. One of the hallmarks of his teaching is NO COASTING. He believes in either being on the gas (hard) or on the brakes (hard) and it shows in the time it took us to get around the circuit 3 times. On the 2nd lap I thought my arms were give out from braking into T1. I got through the agreed 3 laps then tapped out from the flood of emotion and kinesthetic overload. I've got the video I took on my Sena 10C, but I'll have to review it first and see if I can remove the swear words before I post it. Did I mention that I got Dave to tweak my knobs!!!? I generally don't like people tweaking my knobs, it's rude and uncivilized but in Dave's case not only did I LET him, I PAID HIM to do it and couldn't give up the money fast enough. He gave me a few things to feel for NEXT WEEKEND when I head to NJMP Lightning (smile). Lastly, I'd like to say that I hope I don't take as much time between CSS and my next trackday EVER AGAIN. I was last at CSS in May @ ViR and I found it a steep hill to climb. I think my visual skills are much better and I like that. I still need to work on my ability to get the bike steered, into and out of the corners faster.
  24. Leaning on straight

    Interesting...looks like the unmarked 10a will be key to getting T14 set up properly.
  25. Mid-Corner Countersteering

    I’m interested too since I’ve seen faster riders do this in sections like 7,8,9 at NJMP Thunderbolt.
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