Torture Test Magazine's 1982 Suzuki SP500

 

This is the 1982 Suzuki SP500 that I rode for Rocky Mountain ATV/MC's $1,000 bike, 1,000 mile ride challenge. It's a rough looking pile of junk that runs correctly, but still performs like junk. After the 1,000 mile ride, Rocky Mountain let me take the bike off their hands. I will spend the bare minimum on this bike to keep it functional and competitive. At this time there is no plan to build it out into something high performance.

Sponsor spots for this bike are available here.

Races and events this bike has completed:

  • Rocky Mountain ATV/MC $1,000 bike, 1,000 mile ride challenge.

Videos and other media:

  • Several coming soon!

 

Bike Setup

Links to products are affiliate links. Torture Test Magazine will earn a commission on sales resulting from these links.

Suspension, Steering, Controls, and Brakes

Front tire: Pirelli MT16 80/100-21. Available at Rocky Mountain ATV/MC

  • Justification: It came with this when Rocky Mountain handed over the bike. The tire works really well though. It is completely dirt-worthy while still being DOT rated.

 

Front tube: TBD - Whatever came with it when Rocky Mountain handed it over.

Front wheel: Takasago 21x1.60 rim. Looks like an OEM wheel.

Front brake: TBD

Front brake cable: OEM - Available at Rocky Mountain ATV/MC

  • Justification: I installed an OEM cable after a cheaper aftermarket cable broke in an irreparable way under mild braking. The pin that holds the cable into the brake lever actually sheared in half under braking. It was relatively new. Don't use a cheap cable on this brake!
  • Previous: Cheap aftermarket cable (probably something from eBay).

Front fork springs: TBD

Front fork oil: TBD

Handlebars: Tusk T-10 Aluminum 7/8" - Available at Rocky Mountain ATV/MC

  • Justification: This is what it came with from Rocky Mountain, and I see no reason to change them out yet.

Grips: Pro Taper Pillow Top MX Grips - Available at Rocky Mountain ATV/MC

  • Justification: Came this way from Rocky Mountain. I've used these grips on several other bikes. They're a soft, grippy grip (almost sticky on gloves). They're good in wet or muddy conditions, for sure. I'll leave these on there until they tear or wear out. After that, I'll switch to lock-on grips.

Brake lever: Unsure if it's OEM or not. It's what it came with from Rocky Mountain.

Clutch perch: Tusk Quick Adjust Clutch Assembly - Available at Rocky Mountain ATV/MC

  • Justification: It's what it came with from Rocky Mountain. Pretty nice setup though, with the ability to adjust the free-play without pliers. The lever is angled out a bit far for my taste but I'll live with it. If it ever breaks I'll switch to the standard Tusk clutch perch.

Clutch lever: Tusk Quick Adjust Clutch Assembly Lever - Available at Rocky Mountain ATV/MC

  • Justification: It came with it. There's nothing wrong with it. 

Handguards: Tusk D-Flex Pro Handguards - Available at Rocky Mountain ATV/MC

  • Justification: It came with these. If one ever broke, I'd replace it with the standard Tusk aluminum handguards w/ MX shield.

Rear brake: TBD

Shift lever: Appears to be OEM

Rear brake pedal: Appears to be OEM

Footpegs: OEM

 

Rear shocks: Progressive Suspension 13-1240B - Available at Amazon

  • Justification: It came with these from Rocky Mountain. They don't seem to be blown or leaking, so I'll keep them until they're completely shot.

Rear shock springs: TBD

Seat: Appears to be OEM

Seat cover: Appears to be OEM

Rear wheel: Takasago 18x2.15. Appears to be an OEM wheel.

Rear tube: TBD

Rear tire: Pirelli MT21 Rallycross Dual Sport DOT Tire - Available at Rocky Mountain ATV/MC

  • Justification: It came with this tire from Rocky Mountain. The tire has done just fine for all the riding I've put the SP through so far. I'll keep it on until it's completely used up. After that, this thing will just get the cheapest tires (usually Trakmasters).

 

Electronics

Headlight: Appears to be OEM

Tail light: Appears to be OEM

Spark Plug: NGK D8EA - Available at Rocky Mountain ATV/MC

  • Justification: It came with this plug from Rocky Mountain. This is a suitable OEM replacement, but if I ever change it out, it'll be for a DR8EIX.

Stator: TBD

Ignition controller: OEM

Regulator/Rectifier: OEM

Coil: OEM

Battery: TBD

 

Fuel, Intake, and Exhaust systems

Fuel tank: OEM

  • Note: The capacity is awful for how thirsty this bike is. It holds only 2 gallons. It is generally good for only 50 miles before it is completely empty. It hits reserve after only 30 miles.

Petcock: Appears to be a broken original repaired with JB weld. It's amazing.

Carburetor: TBD. Appears to be a huge CV carburetor, probably OEM.

  • Note: Runs cleanly, starts easily, but the throttle response of the big CV is complete garbage. I will be replacing this with ANYTHING that isn't a CV carburetor.

Jetting: TBD

Air filter: TBD

Exhaust pipe: Appears to be OEM

Muffler: A strange combination of the original muffler, some add-on exhaust pipe, and a random two-stroke muffler. 

 

Engine Components

Camshaft: TBD

Piston: TBD

Clutch: TBD

 

Oil filter: TBD

 

Final Drive

Countershaft sprocket: Unsure. No markings. 15 Tooth.

Drive chain: Primary Drive 520 ORM O-Ring Chain - Available at Rocky Mountain ATV/MC

  • Justification: Came this way from Rocky Mountain. I would replace with this exact chain again if it ever wears out.

Rear sprocket: Unsure. No markings. 46 Tooth.