Jump to content

All Activity

This stream auto-updates     

  1. Yesterday
  2. Corner College

    Nice Vid!
  3. Last week
  4. Yoga for rider prep?

    YES!!!! I am 58, but still love and prefer a sport bike over cruiser/tourer. Several years ago I was having issues "folding up" into the bike, my neck would get cramped up, and I would be sore and stiff after any extended ride. I was really concerned how much longer I could do it before the discomfort over ruled the enjoyment. Then a friend who teaches yoga suggested I try her class. She was thrilled when I agreed (she said only one other man had attended, and he got sick halfway through and never came back :-) Well, that was close to 6 months or so ago. Unless I am out of town on business or one of the MotoAmerica rounds I go twice a week. It has made a huge improvement. Easily "fold up" to a crouch, no sore neck or back, can move around much better on bike, and can ride much longer at a time. So I am a believer!!!!
  5. Can Quick Turn Be Overdone?

    I think you nailed it. Just for the sake of non physicists, the rapid quick flick produces an upward force which decreases front tire contact patch area, and, applying throttle further decreases the front tire contact area, maybe even to zero, and upon leaning in the opposite direction, the front tire regains traction and because the front wants to self correct, the tank slapper motion begins?
  6. Corner College

    Here's a little video summary of the day. We had a great time and everyone improved from the morning. I have almost as much fun coaching this as the students have riding the exercises!
  7. S1000RR Rear Suspension

    Dylan brought up exactly the point one of the riding coaches at Grattan pointed out to me. My entry speeds are too low, so I'm grabbing a handful of throttle to make up for it. This is what I would like to work on at my next CSS visit (CODE Race in October)... The plot below is also MO, but from my DAIR suit instead of the BMW logger. It let me overlay my S1000RR lap (blue) with my other bike (red-Daytona 675R, running Dunlop Q3s). Sorry, the turn numbers are different from the BMW log. I learned all the tracks on my Daytona, and I know I need to adjust my braking points and entry speeds for getting more out of the S1000RR and slicks, but you can see in the overlay that I'm basically riding the two bikes the same, just accelerating and braking harder on the straights with the S1000RR. I'm actually faster through the chicane and keyhole (turns 10 and 11) with the Daytona, and this seems like a mental issue I need to sort out, as the S1000RR should be able to the do the same thing!
  8. S1000RR Rear Suspension

    Ok first of all this is TOTALLY awesome that you have this data to post! The datalogger is fantastic, and I'm glad to see you using it, what a great application. That second chart is terrific, lots of information there. At first glance at the second chart things look pretty even from one side to the other, your lean angle is not drastically different on rights versus lefts, but on closer examination the throttle position versus lean angle does look somewhat different - that top red line showing around 75% throttle at 40+% lean angle and some of the yellow and orange at 45-50% are more apparent on rights than lefts, and the slip rate seems, in general, a little higher on the rights but not much (looks like more data points in the >10% range?)... and maybe the characteristics of the corners on that track are what is causing those differences. I think I see the problem - the Michelins are not "adapting" sufficiently to your situation. Do you know if the tire damage is more within the first few laps or sessions or at the beginning of the day versus later? That might help determine if it is cold or hot tear, it sort of looks like hot tear to me (the tears look wider and shallower than I'd expect to see for cold tear) but for sure I am not an expert. But the fact that a 2 psi pressure increase seemed to improve the situation would support that as well - if you have a chance next time to check tire temperature and pressure before and after riding (straight off warmers versus coming off the track) that should help tell you whether it is hot or cold tear, that article above has some specifics of what temp/pressure rise to look for, and/or the tire rep should be able to tell you what is optimum operating temperature/pressure for that tire, to compare to what you are actually getting. If it were me I'd check the alignment on that rear wheel - not sure whether that would or could have anything to do with this type of uneven tire wear but it's a really easy thing to check, and a good idea to do anyway. Then, if the tire pressure and compound seem correct for the track (per the tire rep), I'd next try softening the rear suspension and see if that helps, since that could contribute to hot tearing by making the tire work too hard because the suspension is not compliant enough. Also check the spring rate recommended for your weight and see if you are within range, if the rear spring is way too stiff for your weight that could be contributing to the problem. Since you have good photos AND access to the wealth of information from your datalogger, you could try reaching out to Dave Moss to see what he thinks on the suspension side, I think he does analysis like that and it would probably be refreshing to him to have all that data available to work with. Dataloggers are such an amazing tool!!
  9. S1000RR Rear Suspension

    The slip % should be between 5% and 15%, which it is, and the traction control will keep it in that range. It looks like you are getting a lot of slip % at steep lean, which would suggest that your entry speeds are a little low for your liking and are being compensated for with somewhat aggressive throttle while leaned over far mid turn. I have no clue about Michelins, but would follow the suggestions of the local distributor for that tire.
  10. This is a good thing we might be onto something here!
  11. S1000RR Rear Suspension

    Thanks for the responses! I would say the majority of the hard acceleration corners at MO and Grattan (Clockwise) are right handers. I attached a data logger plot of MO - the highest spin at high throttle are the keyhole exit (turn 10 in the plot) and the thunder valley entrance (turn 4 in the plot). I was surprised to see that the logger shows spin through the back straight kink, and this is also on the right side of the tire. I haven't noticed a different body position from one side to the other, however, I do think I feel more confident with right turns - a lot more knee puck wear on that side! I am using the Michelin Power Slick Evo. The Michelin reps at the track have some buzzwords about it (Two Compound Technology (2CT) and Adaptive Technology (ACT)), the gist of which seems to be that there is only one compound and it's supposed to adapt to conditions. I did try a Pirelli Diablo SC2, which I think is their harder compound, and I had a similar wear problem - tearing on the right side. I do use warmers, and I set the tire pressure coming off the warmers; I haven't looked at what the pressure is coming off the track. The outside temp has varied from low 70's to mid 80's. At most, there is a 5 minute wait before coming off the warmers and heading out to the track, and I put the warmers back on within 5 minutes of getting off the track. The Michelin rep told me to run 24psi hot off the warmers, so that is what I've been running. When I asked a riding coach about the tearing at MO, he suggested I run 2 more psi, so I tried running 26psi - this seemed to help a bit. He also suggested I flip the tire when I saw signs of tearing, so I also did that. I did read the forum article here about tearing, but that was afterwards (:>).
  12. S1000RR Rear Suspension

    I'm not a tire or suspension expert by any stretch, but here are my thoughts: 1) Since it only is happening on one side (and you are riding multiple tracks) that would imply an issue with riding style - unless the tracks are all very right-handed - less likely that a suspension or setup problem would only affect one side. A rider that drives much harder while leaned over farther on right handers might experience different tire wear on that side, though, does your lean angle or body position look significantly different from one side to the other in photos? 2) I'm not a suspension expert but this does look like tearing, is this is multi-compound tire, and is the compound on that part of the tire super soft? Personally I have only seen that kind of wear when the tire was too soft for the for the track surface and/or if temps were out of range (hot tear or cold tear). You might try asking a tire vendor what compound they use on the tracks you run - especially since you didn't have the issue with the Q3s, could be the tire is just not appropriate for the surface, or that it has a super-soft compound at the outside edges and THAT is too soft for the surface. 3) The width of the worn area looks even to me, doesn't show the wave or wider/thinner areas that you might expect to see if suspension was the issue. Do you run warmers? How much does the tire pressure change from coming fresh off the warmers to coming off the track after riding? What sort of outside temps were you riding in, and do you have to sit for long between coming off the warmers to riding at speed on the track? Dave Moss's various websites and videos are a great source of info, here is one that might be helpful:
  13. S1000RR Rear Suspension

    I asked our chief mechanic at the school, here is his response: >> The eccentrics are in the stock position. There is no "wrong setting". Tearing like that comes from wheel spin. Depending on what mode he runs in or what his traction control is set to will vary the wear. Mid Ohio for sure has some straights coming off right handers and a kink so there's gonna be some serious drive in those spots. The position of the wear would indicate getting on the gas late and hard. >>
  14. Hello, I have an ex-CSS '15 S1000RR that I ride exclusive on track (Mid-Ohio, Grattan, GingerMan). I was using Dunlop Q3s without issues, but recently decided to try out slicks (Pirelli, then Michelin). I keep getting excessive wear on the right side of rear slicks. I've received a number of tips from the tire reps at the track and riding coaches: - it's my riding style, I need to pick up the bike more before accelerating hard. - it's a hot tear, I'm running 2 psi too low (went from 24 psi hot to 26 psi hot on the Michelin. - it's the rear suspension, it's too stiff and you might have your eccentrics (top of rear shock mount and swingarm) set wrong. I did try to change my riding style and played with the pressure, and the tires did last a bit longer (up from 2 days to ~3.5). The last point was the one that was intriguing to me - I've never looked at the eccentrics or thought about them. Since I bought the bike used (and had the rear swingarm removed by a mechanic when I had a full exhaust put on), I don't know if they are set 'stock' or something else. Can someone tell from the pictures whether I have stock settings? Does anyone have experience with how the bike handling will change if set these eccentrics different?
  15. New Trailer Setup- Weight and Balance

    Well, we skipped the empty weight part. The trailer is at the shop getting it's upgrades. I also tried out the TRSs and I admit that it's one thing that I will need to read the instructions for as there is a part that gets installed on one of the bikes. I had to figure out which because they didn't mark them. We ballparked where to install the mounting plates. The weigh in will tell me if we got it right or how much ballast will be needed.
  16. Training the cornering weak side

    AdamZisa mentioned that he rides bicycles to help. I saw something interesting this morning. that may be relevant to bad sides and I think Hotfoot is already on the trail. I saw this woman on a bicycle and it looked like she was struggling, fighting the bike. Yes, there was a slight uphill slope but I don't think that was the root of her problem. I noticed as I passed in my car the opposite direction that her elbows were bent at significantly different angles. Her right elbow was above horizontal and her left was down closer to her hip, yet the bike was going straight - I ruled out a pretzeled bike. Got me to thinking about my own body position and the pain I have on the left side of my back.
  17. Knee slider as a learning tool... Why? When? How?

    From some of his other material, I get the impression that Dave is a trail braker.
  18. Better Body Position for Steering

    Thanks for this. IIRC my stock clip-ons have 3 positions. I just may give the further out position a try before plonking down cash for the risers. This part was very interesting
  19. Earlier
  20. Can Quick Turn Be Overdone?

    Wish I had a computer to look at the video frame by frame... but I don't think there's anything too mysterious happening here... For those who have ever done a quick change of direction through a slalom or short chicane you might have noticed that it takes very little throttle (or any at all, if the steering rate is so quick?) to lift the front wheel as the bike is coming upright on the change of direction. This is because the steering rate is so great, you have the inertia of the bike coming from lean to upright, the mass of the bike combined with that inertia means that it wants to keep going up - hence lifting the front wheel. If you're then trying to lean the bike over in the other direction while the front wheel is in the air... well you can guess what happens. I've also seen this with strange geometry/weighting. It was on a work delivery scooter, bit of weight in the top box, a quick-ish u-turn or even just straightening up quickly out of a regular corner would bring the front wheel off the ground and cause a decent tank slapper if not controlled properly. Given the extremes that MotoGP racers are dealing with it wouldn't surprise me if Vinales front wheel came off the ground and caused him to crash.
  21. Better Body Position for Steering

    I thought of this when I saw your post... Dave Moss comes out with some very insightful comments every now and then: Take particular note of your clip on angle as well as the position relative to the forks. To me moving the clip ons 30mm in front of the forks is a fairly radical setup, but what I take away from this is that the riders comfort and ergonomic fit is the highest priority. Move the controls to wherever you need them, the bike is always going to steer better for you if you can use the controls more effectively.
  22. Hi all, I was just reading one of Dave Moss post on Facebook and it really got me thinking... here's the post: And here's my comment on that post: Very interesting post... lots to think about. Makes me wonder if I have been missing the benefits of an important learning tool all this time... Like everyone when I started out I viewed "knee down" almost as the pinnacle of riding technique. As time went on I realised that getting a knee down is not an end goal in itself, it's the product of correct riding technique. I also thought that I didn't want to limit myself and stop leaning as soon as my knee touched down - better to feel the actual tyre grip and let that determine your maximum lean angle. So I just let my knee hang comfortably and it doesn't bother me that it almost never touches down. I'm still pretty happy with my riding and I'm within ~6 seconds of very fast racers at my local track (1:06 vs 1:00 flat, where anything quicker than 1:15 is considered pretty fast for the average rider). Talking about front end slides, I feel like this needs to be qualified - under what circumstances is the front end sliding? In combination with trail braking? I don't trail brake much, and if you're entering a corner with no brakes I've actually found that to be the safest way to increase corner speed and push myself on corner entry and mid-corner; the gains come from getting the bike to maximum lean in as short a time as possible, and if you're really turning in that quickly we know that the rear end will slide before the front does. So I wonder how I can use knee sliders as a tool in my current riding level and style? Or does it's use as a tool really only come into play when heavy trail braking is involved? Thanks in advance for any comments, this seems like a very interesting discussion.
  23. I am quite tall...and I was not flexible. That really annoyed me because I felt limited when riding my bike on the track. And also, it is of common knowledge that if you fall, being flexible is one good way to prevent injury...So one year ago, I started Yoga... simple, at home, 3 times a weeks. For sure, it helped me tremendously with my balance, flexibility and core strength. And to be honest, I really saw the difference in my riding. It helped my position, I got a better body lock on the bike, my back had to compensate less for the lack of core strength, so less back pain at the end of the session...and well, the measurable result: I am faster on faster on the track, and I do believe this is part of the reason. So I can only recommend yoga for riding. It did help me.
  24. One day I was putting a whole series of riders on a bike to work on body position (part of the level 2 off track exercise) and one guy, who was in his 60s, was strikingly more flexible on the bike than everyone else and was able to get into a very hung-off position that was really stable and strong. I commented on his flexibility and he said he had been doing yoga and it really helped. I certainly agreed with him - he was flexible and strong for any age, let alone for someone in their sixties. I was quite impressed. The flexibility in his hips, legs and ankles (compared to everyone else) was the most noticeable when seeing him on the bike.
  25. Hey guys! As a Senior Yoga and meditation teacher I've been thinking allow about how yoga practise could be helping riders. The obvious benefits would be increasing strength and flexibility particularly in the lower body and core. But more than that the work good Yoga can do on focus, stress reduction and management, clarity etc could be greatly beneficial. My question is has anyone used a regular Yoga practise or techniques to try and assist their riding? And if so did you find it beneficial?
  26. 2017 Riding Coach Search

    Great meeting you the other day Cobie. The camp was great and I learnt stacks about myself and of course about riding motorcycles. I'm going through the application now with a long term view - I'll send through as an email as soon as it's done. Thanks again! Stefan
  27. New Trailer Setup- Weight and Balance

    Nail on the head with loading over the axles. I am a little concerned about the wasted space though and this particular trailer feels heavy at the tongue (It's got wooden walls). In a couple days or so, I'll have the parts received to add brakes, which while not required will add a measure of safety. I found a station willing to weigh my rig. It's a dump site not far from my house, so that's good. I'll likely go by and weigh empty then calculate, test load the bikes and re-weigh.
  1. Load more activity