MFG-Racing GP Racing

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The Bike

In 2000 I started out racing on a 15 year old Yamaha two-stroke RZ350 streetbike converted to racing specs and, although old, she was a competent and competitive road racing machine. Probably one of the most fun sportsman class bikes you can find; afterall, it carried me to two amateur regional championships in lightweight and middleweight sportsman in my first year of racing!

If you're thinking of racing an RZ, be sure to contact Gary Stumm of MRA Racing in Florida. Click on the racing picture below to have a glimpse (a mpeg file) of what racing is like at LRRS from a spectator's point of view.

The RZ carried me from running 1:32 in my first race to achieving my goal of running 1:26s at the end of my first season.

Accu-Products Racing Yamaha TZ250

Through last season I raced true GP bike -- a 1993 Yamaha TZ250: 80 HP, 220 pounds...a real 600 killer. The TZ took some getting used to, as the power range is much more narrow and the light-switch effect of the power coming on can get you out of shape in a real hurry.

It also bumped me to a much faster class and put me against the newest and fastest 600s available today. The capability of this bike is nothing short of amazing, however, as it will take you around corners faster than you ever thought you could go.

The key is to keep your corner speed up and make your passes coming into the turns.

Above is the yellow 2003 paint scheme. Here she is in her 2002 Paint scheme (white), the MFG-Racing.com TZ250, sponsored by Accu-Products:

Click on Pictures to Enlarge

I've now moved to a 2004 KTM 525SMR (supermoto racer). The bike is a real blast. About 240lbs and 60 rwhp means it really rips in the lighweight classes and believe it or not it really handles well around a road race course. I'm having a blast on it!.

The KTM 525 SMR (SupermotoRacer)

Ready to Race in the S1 category, thanks to its super-agile handling and miniumal weight. Lots of torque and plenty of power, which is passed to the asphalt via the specially tuned, 6-gear transmission and 165 slicks.

Engine

Engine single cylinder, 4-stroke
Displacement (cc) 510.4
Bore x stroke (mm) 95 x 72
Compression ratio 11:1
Starter kickstarter
Transmission 6 gears
Carburetor Keihin MX FCR 41
Control 4 V / OHC with roller rocker lever
Lubrication pressure lubrication with 2 Eaton pumps
Transmission lubrication -
Engine oil Motorex Power Synt 4T 10W50
Primary drive 33:76
Final drive Chain 5/8 x 1/4"
Cooling liquid-cooled
Clutch wet multi-disc clutch, operated hydraulically
Ignition Kokusan digital 4K-3A

Chassis

Frame chromium molybdenum
Subframe aluminium
Handlebar aluminium, tapered
Front suspension WP-USD 48 mm (1.89")
Rear suspension WP-PDS shock absorber
Suspension travel front/rear 285 / 310 mm (11.22/12.20")
Front / Rear brakes disc brakes 310 / 220 mm (12.20/8.66")
Front / rear rims 3.50 x 17"; 5.00 x 17"
Front / rear tires 120/75-17"; 165/55-17"
Transmission 14:45
Main silencer aluminum
Steering head angle 63.5°
Wheel caster 90 mm (4.41")
Wheelbase 1481±10 mm (58.31±0.39")
Ground clearance (unloaded) 310 mm (11.22")
Seat height 855 mm (33.66")
Fuel capacity approx. 7 litres (1.85 gal)
Weight (ready to race, no fuel) approx. 109.5 kg (241.4 lbs)

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