Daytona Yzf
DAYTONA YZF
BUILDING THE CYCLE WORLD SUPERBIKE
YOU DON'T STAND A CHANCE AT DAYTONA WITHOUT A GOOD BIKE and a good tuner. Team Cycle World had both. Yamaha's 1993 YZF750SP gave us an excellent starting point. Richard Stanboli of Attack Performance took over from there, transforming roadbike into competitive Superbike. Stanboli, a 30-year-old Southern Californian, drew from experience he has gained with Attack's own race program-an FZR1000-powered YZF Formula USA bike ridden by Paul Harrell. Attack handled complete chassis preparation along with track-side tuning of the CW Superbike at Daytona. A good portion of Stanboli's business is bracing/fabricating swingarms. The Attack Performance swingarm on our bike
was built primarily of folded and pressed aluminum sheet with billet machined adjuster blocks and pivot tubes. The arms were internally braced using bulkheads to enhance rigidity and allow for the use of thinner, lighter aluminum sheet, producing a 2.5-pound weight reduction compared to the stock component. The stock linkage was retained, and axle-adjusting slots allowed for a wheelbase measuring .2inch shorter than standard. Attack Performance designed the arm in conjunction with its prototype pentagon drive to facilitate quick wheel changes during the 200-miler.
Other hand-built chassis components included machined billet-aluminum footpeg brackets that utilized Yamaha OW01 pegs and controls, and custom fairing brackets to fit AirTech’s 1994 race bodywork. Stanboli also enlarged the stock YZF fuel tank to the 6.34-gallon limit allowed by AMA rules. Volume was increased in the tank’s sump area and then reduced up high-via sealed, internal canisters-so not to exceed the legal capacity. A lower overall center of gravity was achieved. A system of baffles was incorporated to reduce side-to-side slosh, and dual dry-break valves were installed to allow for complete refueling in 6 seconds. The
steel tank was then replicated in carbonfiber by Gotham Racing Composites, yielding a 7-pound weight reduction. The Gotham tank is a sixpiece construction that uses five layers of 6-ounce carbon plain-weave dry fabric and high-quality impact resistant epoxy resins. Due to sustained high speeds on the banking, tires are
perhaps the single most important aspect of any Daytona Superbike. Dunlop’s 190/55 R17 KR108 race slick was fitted to 6.25-inchwide wheel at the rear; a 125/70 R17 KR106 on a 3.75-inch rim went up front. Dunlop uses a special tire compound and construction which is
only used at Daytona and nowhere else. We had Vance & Hines build the engines for our Daytona effort. V&H Crew Chief Jim Leonard headed up the assembly of two race motors-one to be used during practice and qualifying, a second to be plugged into the chassis for the 200. Leonard used Yamaha race kit parts throughout. These kit parts-available through Yamaha-include lightened crankshaft, titanium rods, pistons, cams, airbox and clutch springs. The cylinder-head ports and valve seats were reshaped for maximum flow. Leonard kept the standard valvetrain and gearbox. A Vance & Hines PowerPak ignition was used, allowing Leonard to map an ignition curve ideally suited to Daytona's sustained flat-out running. At 128 rear-wheel horsepower, our engines were producing about 80 percent of what Jamie James' team bike lays down, but Leonard's combination yielded very manageable power, something any first-time Superbike pilot riding on hard-com pound Daytona slicks could appreciate. Add a mechanical clutch kit, quick-turn throttle assembly and kit exhaust header with Vance & Hines SS2-R tailpipe, and you have the major ingredients that propelled the Team
Cycle World Superbike.
Don Canet
SUPPLIERS
ATTACK PERFORMANCE 12929 Telegraph Rd., Unit G Santa Fe Springs, CA 90670 310/903-7757 Braced GP swingarm: $2500 Data-acquisition system: $3100 Footpeg brackets: Si 50/pair Five-piece fairing-mount kit: $250 Electric shifter: S180
AIR-TECH 3052 Industry. Suite 109 Oceanside, CA 92054 61 9/757-3366 Fairing upper: $418 Fairing lower: S257 Seat: S209 Front fender: $86
DUNLOP TIRE CORP. P.O. Box 1109 Buttalo, NY 14240 800/828-7428 Front: S160 Rear: $230
ESSEX PARTS SERVICES INC. 2350 Industrial Park Blvd. Cumming, GA 30130 404/889-4096 Brake calipers: S778/pair Front master cylinder: S395
FER000 2999A Aihambra Dr. Cameron Park, CA 95682 916/677-4178 Brake pads: S35/pair
FTM & ASSOCIATES 1960 Peacock Blvd. Oceanside. CA 92056 619/732-3161 RK racing chain: S250
GOTHAM RACING COMPOSITES 8810 Brookville Rd. Silver Spring. MO 20910 301/608-9200 Carbon-fiber fuel tank: $1500
INDIGO SPORTS 12407 Slauson Ave. Unit B Whittier, CA 90606
310/945-8149 Custom-fit brake-line kit: Si 34 Aluminum engine cover bolt kit: $97 Misc. aluminum bolts and nuts: $253 Dzus D-ring tairing fasten ers: S59 Titanium axles: $190 each Misc. titanium nuts and bolts: $468
NOLEEN RACING INC. 16276 Koala Rd. Adelanto, CA 92301 619/246-5000 Revalve fork: S229 Fork springs: S80/pair Steering damper: $250 Rear shock: S645
SLATER BROTHERS P.O. Box 1 Mica, WA 99023 509/924-5131 Front-brake rotors: $570/pair Rear-brake rotor: S195 Rear caliper: $92
SPROCKET SPECIALISTS P.O. Box 256 Palermo, CA 95968 916/533-0802 Rear sprockets (6): S298 Countershaft sprockets (3): Si 20
TARGA ACCESSORIES INC. 21 Journey AIlso Viejo, CA 92656 714/362-2505 Windscreen: S40
TOTAL PERFORMANCE KUSTOM PAINTING 31 0/862-7441 Custom paint: $700
VANCE & HINES RACING 14010 Marquardt Ave. Santa Fe Springs, CA 90670 310/921-7461 Cylinder head: $1309 Mill cylinder block: S55 Machine race-kit pistons: $65 Race exhaust system: S520 Ignition unit: S399
