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Thread: 851/888 racebike basketcase

  1. #191
    Join Date
    Jan 2015
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    Chicago
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    Dyno results are in. This is at Moto Corse Performance (Chris Boy's shop). I'm sure the Ducshop dyno would read a bit less, but I'm still pretty pleased with the results--a little dip at 6000 but 125 at about 7600 and 147 at 9500? Yikes.

    Oh, and this is standard fuel. Could do a second (switchable) race fuel map, but the piggybank is pretty empty these days.

    The refurbished shock arrived too. Good timing. Can't wait to bring this down to COTA MotoGP.

    Video: https://youtu.be/qyXqBj2YjY4








    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  2. #192
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    Cornwall S.W. England
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    Those are very impressive figures and in the real world rev range, peak power at 9,2>500 rpm.
    Just what you need to keep the motor reliable IME.
    I think the dip at around 5 or 6,000 rpm is about the chip cheating the noise levels in various markets, I might be wrong and I'm sure Brad or Doug could say for certain?

    I'm using the ignition map from a early 916 Strada and have no dip in the performance in this area
    (I also used a FIM chip intended for a 916 with open pipes that had the same results) possibly the factory weren't so concerned with the noise levels back then?
    When I had my 851/916cc motor mapped we tried different advance curves, after mapping the fuel but couldn't improve on the original advance curve.
    This motor is in a pretty soft state of tune but makes 128 rwbhp at 9,200 rpm.
    Having seen your print out I've now got a target figure for my 955cc motor.
    The crankshaft assembly, pistons and rods went off to the balancers this morning.

    Steve R

  3. #193
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    Usable power and reliability were the goals.

    It's an ST4S harness and Microtec ECU, so there is no chip and it has nothing to do with noise levels--the map is 100% custom from scratch. Perhaps there's a little room for improvement by playing with the ignition timing in that area some more, but I think the lull is just a characteristic of the exhaust and cam combination. Without an EXUP-like system and variable valve system, you're never going to get completely optimum all the way through the range. Hell, that's why it starts to fall off a little after 9500. But the 6000 dip is far from what I would call a "hole". The power in that range is still at 80 and increasing. And torque is still at 70+ ft-lbs from as low as 4500.
    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  4. #194
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    Jan 2015
    Location
    Chicago
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    The bike visited Daytona this weekend, on its way back to me. It will be home Tuesday.

    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  5. #195
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    Jun 2007
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    Melbourne, Australia
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    1,251

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    what's the engine spec?
    Brad The Bike Boy

    www.bikeboy.org

  6. #196
    Join Date
    Jan 2015
    Location
    Chicago
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    996cc ST4S motor with 996 superbike heads (standard valves), SPS cams, lightweight pulleys, lightened flywheel, machined/vented clutch-side case, Ben Fox lightened/balanced/polished 996RS crank with Carrillo rods and CP high comp pistons, Termignoni 50mm spaghetti exhaust, stock ST4S single injector throttle bodies with RC Engineering modified 450cc injectors, Microtec ECU.
    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  7. #197
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    Jan 2015
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    Chicago
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    The bike is home. I think it looks better from the side or rear 3/4 instead of front 3/4.





    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  8. #198
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    Jan 2015
    Location
    Chicago
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    Finished up the final bits Saturday. Swapped in the Ohlins shock, replaced leaking crimp-type hose clamps inside the tank with normal screw-type, carbon fibered a headlight mount into the front fairing, adjusted the mounting position of the Shorai, ran the breather and return lines (even though I dont have the 851 breather tank yet), and got all the lights and signals working--the Motogadget Blaze Pin turn signals are extremely bright.

    Photos to come, including taking the bike for its shakedown run in the morning.

    Next weekend we load the bikes up for COTA MotoGP.
    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  9. #199
    Join Date
    Jan 2015
    Location
    Chicago
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    The shakedown on Sunday was good--a few minor things. I even managed to make the switch to race shift pattern without much trouble. I did forget to mount the mirror, which made me paranoid. The headlight is extremely bright, which I have a plan for.

    Both the plates and the breather filter are temporary.




    Tonight I managed to hopefully sort the fuel drip once and for all, installed the carbon fiber handlebars, and made a simple aluminum piece to attach the fairings at the belly with dzus fasteners. Titanium dzus, of course, because steel is for sucks. And I robbed the Ohlins damper off my NSR250 (which didn't need it anyway) and put it to better use here.









    I picked up a ram mount and a Garmin GPS with satellite speedometer. ("Yes officer. I DO know how fast I was going.") I'll get that wired Thursday night and install the correct CF undertail breather box. After that, I think it's ready to load for Texas.
    Last edited by nine16; 04-13-2017 at 02:21 AM.
    '01 996R, '94 888 SPO Ltd, '88 851 Adamo racebike, '91 ZX-7R K1 homologation, '89 NSR250 MC18r5k, '01 Derbi GPR50/75, '71 CB450/500 café.

  10. #200
    Join Date
    Oct 2013
    Location
    Belgium
    Posts
    645

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    Nice job done. Super write up , been following for a while now. Now where are my spanners ????

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