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Pressureangle

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Posts posted by Pressureangle

  1. Man, you stepped in it on your first post lol

    We've all had it, seems like there is no 'patent' sure cure

    Everybody will be along soon enough to pile on the thread and direct you to the appropriate historical threads to read.

    My '97 1100 Sport-i had stock cans with a Feracci crossover- nearly undrivable at 3k rpm. After months and miles of proper tune-ups, replaced sensors, and an aftermarket tunable ECU I could never completely tune it out. Minimal yes, and mostly ok but I'm a perfectionist for drivability. Mine finally completely resolved only with the installation of a cam drive gearset replacing the chain and weak-suck stock chain tensioner. i don't know that anyone else has reported the same, though more than a couple here have the gearset. Put your reading glasses on and your warm garage socks and settle in to the comfortable mindset that it will never be resolved, then you'll be extra happy when you hit the combination that your particular bike needs. 

    • Like 2
  2. On 9/27/2023 at 11:40 PM, docc said:

    So, some very notable electrical improvements from cleaning/servicing the ignition switch?

    Yes, not only has the discharge disappeared, but the charging system seems to work better as well. 

    • Like 1
    • Thanks 1
  3. Tony Foale raced Aermacchi-HD singles; they already had a spine frame that worked famously well, which he improved and adapted to other units, most notably MG. The Aermacchi spine dates back to at least 1961.

    Harley-Davidson Aermacchi CRTT frame with bare engine

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    • Haha 1
  4. 29 minutes ago, Lucky Phil said:

    I'd buy a set of these but that would be a "step down" for me. Get it/..."step down" lol. I'm here all week folks.

     

    Phil

    Thank goodness it's already Thursday here lol

    • Like 1
    • Haha 2
  5. 24 minutes ago, po18guy said:

    Crop dusting all that grain, one's mind begins to think about what could be made from all that grain. On a hot and dusty day. Or a rainy day. A gray day. Any day...

    It wasn't so difficult. The US forces prohibit alcohol due to being in a predominantly Muslim Country; so them sneaky wine aunts' care packages got confiscated. But of course, things being what they are, instead of destroying it and reporting it, them what had their hands on it sold it on the black market, and it found it's way to the receiver with extra cost, and sometimes to the ...others... in the area. The Russians reportedly paid a high premium for American liquor. I wouldn't know about that, of course, since I only played chess with them in their off time. 

    • Haha 2
  6. Rebalancing for piston weight is really a non-issue. Anybody who has talked to professional tuners knows there is a wide range of balance factors for single and twin cylinder engines; the longer the crankshaft, the more critical balance becomes due to torsional harmonics, number of main bearings etc. But for our big dumb lumps, there's a generic recipe for 90* twins, and some accommodation for the resonance in the frame for felt vibration. In my '85 LM1000, I installed Carrillo rods under the stock pistons without a rebalance, and it became dead smooth at all RPMs, losing the annoying handlebar vibration around 4000 rpm. I was as surprised as anyone. Balance factor has only 2 functions, comfort and mechanical durability; for instance, old British twins would literally break the crankcases if the balance factor got too far away from 50% (iirc) On something like a big block 'Guzzi or H-D Sportster, the crank and cases are so overbuilt it's simply not a structural issue. For me, I would never tear down an engine to rebalance it unless it proved uncomfortable, or if it was going to be thrashed within an inch of it's life at maximum effort. 

    • Like 2
  7. The simple old-fashioned way to check suspension travel is to place a zip-tie on the fork tube, go through your areas of concern and read the travel via the zip-tie which has been pushed up the tube to record the maximum travel. 

    'Harshness' a LaGrasta stated about his driveway transition is not a function of spring (unless actually bottoming the fork) as it is too much compression damping. That said, if you're a fast rider, you may need that control at high speed which feels harsh at low-speed big bumps. My 'Sport is set up so that if I encounter a big pavement change such as parking lot/driveway, it will actually bottom; if I'm banging through the Dragon, it will compress to about less than an inch of max travel. At higher speeds, nowhere near that as cornering doesn't generate the G force that braking can. Let me make clear that I am no suspension scientist, just have my subjective feels, lightweight science such as zip-ties, a lot of personal experience from Roadracing, flat track, observed trials, and decades of anecdotal education from amateur and professional suspension users. 

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  8. Shock length... a thread of landmines the likes of tires and oil.

    The difference between a long and a short shock where the ride height is identical, is zero until you find the circumstance in which the longer shock can extend further than the shorter shock. (or bottom out, but that's dirt stuff)  The shorthand of this is that on-road, the only time you'll see a difference is when you're turning on the brakes, hard. A longer shock allows the rear to rise further before the weight of the rear wheel comes into play, which in turn reduces rake and generally eases turn-in. 

    • Like 1
  9. 2 minutes ago, GuzziMoto said:

    You and me both. Try rebuilding Ducati cylinder heads in the pits at a racetrack, hand grinding the shims to get the clearances right. Or hammering the frame to get it close enough to straight so you can rebuild the bike and race (so it turns better one way then the other, big deal).

    Wrecked an 883 once, it handled so much better after the crash- but could never get the top motor mount in it again... blew the engine in the Volvo 242 endurance car at hour 4 of the Nelson Ledges 24 hour and swapped the owner's wife's car engine out into the racer with rope and a 2x4 lol. Ah, the good ol' days. The call of the wild; "Anybody got a footpeg bracket? Front wheel? 8x25mm bolt? lol

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  10. 39 minutes ago, audiomick said:

    We should perhaps no be so arrogant about something like what is to be seen in that video. Obviously it is is not as precise as it should be, but I think we shouldn't underestimate the ability of the person doing the work. He apparently lives in a land that doesn't have the resources that we take for granted, and he only stays in business if the motors he works on don't explode after he works on them. :huh2:

    Don't get me wrong. I have a fine appreciation for people like this- in fact, I spend more than just a little time on YouTube looking at how complex technologies are handled in the third world. The tragedy amongst the comedy is how we first-worlders have lost touch with technology to the point that most would say this is impossible, won't work, won't last an hour, etc. because we think everything has to be CNC and assembled in a white lab coat in a climate controlled facility or it won't work at all. 

    Anybody who's had a transmission scattered over the bed mat from a pickup truck under the headlights in the pits before Sunday's main event understands.

    • Like 5
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