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Keebler750

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About Keebler750

  • Rank
    TT Member

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  • Gender
    Male
  • Location
    Alberta
  • Interests
    Figuring out how to get my darn 2016 ****** *** to work in the mountains!

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  1. Keebler750

    Gravel or Bumpy Turn Entry Offroad

    I just bought an FE501. Um, yeah.....NOW I can directly see the problem! The 501 turns and sticks better, with excellent mid-turn balance ON THE TKC80s!!! ­čś« I'll weigh the front and rear on the new one (701 was 45f/55r), but I'm betting it was the weight bias issue that was killing me. At least I feel that I understood enough about riding to question the front, anyway...
  2. Keebler750

    Gravel or Bumpy Turn Entry Offroad

    Yeah, I'm noticing that rear weight for sure. I really find myself setting the speed early and powering through. It feels slow....
  3. Keebler750

    What does cavitation feel like?

    Meh. I thought I was on to something, but I still can't figure out how to get it to work with the basevalve and reservoir pressurization. Oh well.
  4. Keebler750

    What does cavitation feel like?

    Here's what the physics looks like. I modeled the stock midvalve "Baseline" then changed the ports to look approximately like the Kreft one. Look at what it does for the damping curve when you don't hit the progressive 'port limit' wall...! I think I might try these midvalves if Kreft or MXT still have them! (I did fiddle with the valving to get the digression...)
  5. Keebler750

    What does cavitation feel like?

    DUDE...... the bike had 0.9mm and 1.3mm float and one side at one 17 x 0.10 face shim asymmetrically BEFORE I revalved it, so I figured I'd be going in the right direction... It's an experimental test bed and I'm learning a lot. What's wrong with that? As I said in the post above...and I'm NOT even close to joking...this is the best this pig has worked FROM STOCK!!! (and I'm faster besides, which ain't really saying much since I'm a newb...)
  6. Keebler750

    What does cavitation feel like?

    Yeah. It honestly didn't make much sense to go there, but you have to understand how I think - I don't mind going too far in one direction to define the territory. Remember, this thread isn't about setting up my bike, but asking about cavitation effects so I can add those ideas to my arsenal. From what I can see, these mid ports will always limit, so I might as well slow down the damping PRIOR to that point. I can rip the forks apart so fast it ain't funny. I used to rip entire bikes apart between heat races to go through stuff. I think I'll call MX-Tech or Kreft up about the mid valve at least, if not the MXT Lucky system. I just wanted to understand WHY first. I'm learning! I have actually been trying to figure out how to STIFFEN the mid to become a pusher, and then use the base valve stack and port flow, but have no idea if that'll ever work. Every supposed 'mistake' is a chance to learn something. Here's the thing...this is the BEST this bike has ever worked....on road or trail, right from stock. How scary is THAT????
  7. Keebler750

    What does cavitation feel like?

    Say....this sure looks like a replacement piston to me.... https://mx-tech.com/kreftmoto-20mm-piston/
  8. Keebler750

    What does cavitation feel like?

    I'm gonna say it's silly to have that mid-valve symmetrical like that on Reb and Comp when you need more flow on Comp side...?
  9. Keebler750

    What does cavitation feel like?

    This bike started out deflecting like crazy over the tiniest rock. It was disconcerting and I was not interested, as a new offroad rider, in upping the pace to find out what happened next. So, I had it revalved (once by a moron, and once by someone I used to race with who knows his stuff...) knowing full well that as I sped up and learned to actually ride, I'd need to revist the setup. Of course, I started tightening the bike up as I got faster, but it seemed what the bike still needed was more low to mid damping, and even less HS. I just did my first revalve on a cartridge fork after a lot of single stack and mid plus base valve simulations in ReStackor and a lot of thinking and worrying. My valving was asymmetrical before, and I haven't got an explanation from my buddy as to why. So, I did the revalve, and this thing is so composed and plush through rock gardens and pot holes, and minor jumps and drops! It eats up bumpy single track and lands the front wheel after a loft, hop or squirt over a ditch no problem. However, when at neutral throttle on SINGLE bumps, at speed (say 30 or 40+mph), without rebound packing, I get the described huge slam. Yes, it's a weird looking setup, in the mid stack (one shim!) but I just don't see how I can make it work with such a damn small piston, ports and damper rod, and this was just an experiment anyway to see what would happen. I'm quite happy pulling it apart and trying a different setup. Here's the 29mm base valve and the 20mm mid. I just realized I didn't include the throat in the base valve calc but the mid valve calcs from ReStackor...I assume the flatline on the flow area is the port limit?
  10. Keebler750

    What does cavitation feel like?

    The mid-valve compression port flow area is 69mm^2 and it limits at around 2.8m/s or 110in/s, after which it goes progressive, of course. It's a 20mm valve. The float basically slams open and the valve runs on the ports. The BV is 29mm but has 175mm^2 area. As I said in the post above...it doesn't limit all the way past 50m/s. Looking at the mid-valve rebound numbers I can see that it never port-limits, so....a redesigned MV piston could use more area for the Comp side instead of having the current symmetrical 4 Comp/4 Reb setup.
  11. Keebler750

    What does cavitation feel like?

    The base valve on this bike has HUGE ports and ReStackor says it can handle past 50m/s (2000in/s!!!) velocities without choking! I am suspicious I've gone too soft on the base valve which is upsetting the pressure balance somehow. However...I'm totally faking it at this point with lack of knowledge as I muddle toward the light....
  12. Keebler750

    What does cavitation feel like?

    I'm trying to limit the discussion to subjective effects on the trail as I try to read the bike during testing. Also, I'm trying to build a mental library of what various changes do and feel like. I don't mean 'what is compression damping' kinds of questions, but more 'what are the nuances between similar effects and where do you look for changes?' We're getting to the point where y'all will try to set my bike up, but I'm actually trying to learn deeper stuff from you, if that makes any sense? As a former roadrace tuner with ZERO offroad knowledge, I'm trying to recalibrate myself to the traction and control aspects of ....slightly bumpier terrain..... Simply put, my brain is still wired to look for lap time, so...drive traction, mid turn speed, braking, stability in transitions, yada, yada. I understand some of the weight transfer and stability issues, and the need to keep a certain amount of force on the contact patch, but I need to transfer that to the various parts I want or need to modify for certain effects. Also, as a new dirt rider, I'm always going faster and learning new stuff and then requiring a totally new setup as I up the pace, so.... That's the backgrounder to why I'm asking the way I'm asking. I'm not trying to be a dick. I'm getting my technical brain back in gear after a 25 year hiatus. I'm trying to get a bike to work in really tough mountain trails that I probably shouldn't be trying to ride there, but I'm learning a TON, and if I don't kill myself, those skills will definitely transfer to a 'real' bike one day, and I'll have learned 'the hard way' in all kinds of technical ways, which IMO is the best way to learn (providing you don't break bones, lose fingers or poke out an eyeball....) Let's just say, I have a front fork that everyone says is no good, and I want to understand WHY because it is a great primer to getting back into things now that I'm ....Finally. Back. On. A. Motorcycle!!!!! YAAAAYYY!
  13. Keebler750

    What does cavitation feel like?

    Well, this is what I'm talking about with "feel"....the possible hydrolocking. From the documentation in ReStackor....
  14. Keebler750

    What does cavitation feel like?

    1. Mid-valve is running ONE face shim at 0.9mm float. That's it. Nowhere left to go to reduce HS Comp. I'm actually worried about breaking the shim. 2. Low oil height numbers (ie 50mm vs 110mm) or low height in the fork (ie 150mm vs 110mm) ? Stock is 110mm. I'm running 135. Should have LESS chamber pressure than design spec. 3. Not an air fork 4. Not hydrolocking, if you mean due to oil height. I'm running less oil than stock and I can land a jump WITHOUT this effect, using more of the travel. If I say what fork it is, everyone will bypass the useful troubleshooting and go straight to absolutist labelling, so I'm looking for outside the box insight for now...
  15. Keebler750

    What does cavitation feel like?

    No. It's definitely a front lockup of some kind. Nowhere near bottoming, either...
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