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Discussion Starter #1
So I've been watching a whole lot of Dave Moss, and I wonder if we have any guys here like that whereas you can recognize tire pressure issues, rebound issues, preload issues, compression issues, spring rate issues, etc... just from reading a tire.

Anyone see anything of note in this pattern? I mean I see the rear edge of the sipes are getting 45's on them; I see the front edges are getting slightly raised lips, i see the "outgoing tide" pattern; but I'm curious to hear someone dissect the wear.

Anyone have any thoughts on this tire?:dontknow:

 

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Formerly CLCRACINGAaron
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What pressures were you running hot off the warmer?
 

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Your tire wear looks fine, no major suspension issues, maybe just a hair of a raised edge on the leading half of the tread. Usually if it’s on the leading edge rebound is too slow. 1/4-1/2 turn will eliminate that. That wear on the rear half of the tread is pretty heavy though. What's your PSI coming off the track? You could probably drop a PSI, I'll wait to hear what your pressure is though.
 

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Discussion Starter #5
Thank you, gentleman.

At the risk of embarrassment, it was my first track day. I had no idea what to expect, and I unfortunately have no budget for warmers. I couldn't even rent a Home Depot trailer to drag her there; I rode her 105 miles South from my house to Homestead-Miami Speedway with 20 pounds of bottled water, a sandwich, and some painter's tape on my back. There was a deal going on for the Novice Group whereas the $305 leathers & boot rental would be refunded as long you didn't wreck them. When I learned I could get seven 20 minute sessions on a racetrack for $205; I was like white on rice! I wasn't able to bring any tools, air pressure gauge/compressor, fuel tanks (was stuck with $8.50 race fuel), etc. Yes, I was clueless as to what I was walking into, but I had to go. Honestly, I can't stop thinking about. You know when you get off a boat, and you still feel the sway of the ocean in your equilibrium? I had this parallel audio thing whereas I heard, in my head, the "vroooom, vroooom, vroooom" of bike exhausts ripping by the paddocks. It went on all night long until I passed out. When I woke up the next day it was gone... and I missed it. It was so intense on my ride home back from the track that I kept looking over my shoulder for bikes. Palm Beach International Raceway is only 30 miles North of my house, and I'm chomping at the bit to get there tomorrow. This Sunday they are offering the same refund on the suit/boots, but my finances are an issue. $410 in two weeks for R&R may not be doable. It's f***ing killing me... consuming me.. frustrating the hell outta me. But I digress.

Ultimately, I do not know track pressures. I've always inflated my bike's to 35psi cold, and that's all I can offer as a reply. These were brand new Pirelli Diablo Rosso II with MAYBE 200 miles before that track day last Sunday.

Stock shock spring preload was loaded pretty heavily as I'm 270# wet. I'm sure I'm over 300# loaded, but with just clothes & shoes it registered 3/4" sag. I figure loaded with gear it brought me to 1". Rebound - if I screwed it all the way in - it would back out 3.5 rotations which as I discussed here: https://www.zx-10r.net/forum/f128/gen1-fork-rebound-compression-screws-351323.html isn't kosher, but irrespective of that, I screwed it all the way in & the opened it back out 1.75 rotations. So you guys are suggesting a bit more. Is that .25/.5 in or out?



 

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Formerly CLCRACINGAaron
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Dude...I really want you to pit with me (or anyone with experience frankly) next time out. How close are you to Jennings GP? It’s off I75 North about 12miles south of the FL/GA line.
 

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Discussion Starter #7
AARON <>
Miami-Homestead Speedway.............. 105 miles South
Palm Beach International Raceway...... 30 Miles North
Sebring International Raceway........... 111 miles North
Jennings GP..................................... 362 miles North
 

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Formerly CLCRACINGAaron
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So I take it you will be hard pressed to make it up to Jennings? I’m in ATL...everything else is a big trip, however they aren’t out of the question this winter.
 

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Discussion Starter #10
AARON <> "Hard-pressed", yes, but as all we adrenaline junkies seem to be, I'm a pretty intense kinda guy. As such, "out of the question" isn't often in my vernacular. I'm so in... I'm in hook, line, and sinker. I just gotta clean up my backyard a bit... if you know what I mean. As alluded to, in jest, in probably too many of my prior posts, my finances aren't exactly in order due to a long bout of underemployment after a surgery that took me out of my career. I work in sort of a very specified niche of my industry, and reentry has proven incredibly difficult. Honestly, after a long fight, I'm at the point of capitulation. I'm just tired of chasing my agents for work, and the market being constantly dry. Last Sunday's track day was a major internal catalyst for me. It motivated me to commit to changing markets; accept working for a couple dimes on the dollar; and hope for the best because steadily making two dimes on the dollar, hopefully, will be better than the sporadic high dollar jobs I've been scraping by on over the last 2.5 years. I've already put my feelers out in my prior general industry since last Sunday @HMS, and it looks like there are some parties that might be interested in me. I Skype interviewed with one, and got a second interview with HR via telephone that went well. Word is they will be moving quickly, and making a decision by Monday. I met with another party yesterday which is, in fact, in my niche, and it went well, as well. They are rolling over the numbers, and we'll see what they come back with. Another lead I was working on was scheduled to reach out to me yesterday, and since, has not. The last, I have been in regular contact with two of their members since our paths crossed on Thursday, and we are meeting for dinner this evening @20:00 so I'm hopeful by tomorrow or Tuesday I'll have good news.

Once, I get back on my feet, I'm very interested in heading up to Jennings GP. I'm honored by & appreciative of your offer, and I'm working on finding a way to take you up on it ASAP. :eek:ccasion1 This should give me a little time to work off some of this gut, as well... sh!t's gettin in the way.:BangHead:

TEROR1 <> Ok, thank you... so I am going to back the screw out 1/2 a turn counterclockwise, and see what I feel. Hopefully, I'll get a trackday soon to see how the tire reacts.

As for the shock, you were in my front brake thread so you know my ZX-14R Nissins cost me $179 for the MC/reservoir/calipers/hoses on eBay; OEM ZX-6R pads were another $143 new; and fluid was another $10. As emasculating as this may be to admit, that took me quite awhile to amass. If I had the coin for a new shock, I'd get one. :wink2:
 

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that band around the edge there shows some uncontrolled oscillation going on...

get the right spring for your weight, or change whole shock since now you've become a trackjunkie!

I don't know pirellis that well, but people seem to run them on track at those pressures, maybe even a bit lower till 30psi

But also an important question how did the rear feel to you??
 

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Discussion Starter #12
111 <> Thank you for the reply.

I'm not sure what you mean when you reference "that band around the edge". Are you talking about the 10% wide strip of soft compound rubber, and if so, what about it is presenting "uncontrolled oscillation". Furthermore, what would cause said oscillation, and what would correct it?

As explained to TEROR1, I can't really afford a new shock, but I am saving for new springs front & rear... it's not cheap.:wink2:

As for how it felt, it felt comfortable pretty much all day, but it was quite "squishy" coming left out of a chicane onto the front straight. It seemed to move around quite a bit on that turn, for whatever reason, and by the end of the day, I was losing a little traction there. I chalked it up to just being so tired that my body position was worse than earlier in the day.
 

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You need to get springs on the bike for your weight, first thing. The springs keep the geometry correct for your weight and allow the dampers to function properly.

The second thing is to make sure you use the correct tire pressure.

At your pace and skill level, this should be enough to get you started on track days. You'll learn more as you go but this will get you going in the right direction.

There is much more to it than can be explained here, and you should talk to a reputable suspension tuner either from this forum or at the track. You're a big guy so the correct springs are very important. You can't fix this with preload or by adjusting clickers.
 

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Its not terrible by any means but it can be helped by some adjusting. Try 3 clicks in on compression to help keep the shock extended and not squat and loosen rebound by about 3 clicks and give it a go.
Of course there are many variables and its not a linear process but if youre on a tight budget, it is what it is! 🙂
 
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