Content Source: 2020 550 Indy 144 Owner’s Manual (9929781 R01) > Specifications Chapter

IMPORTANT

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550 INDY 121

Capacities and Dimensions

Body Style

PRO-RIDE

Rider Capacity

1 Rider

Chaincase Oil Capacity

8.96 oz. (265 ml)

Fuel Capacity

11.5 gal. (43.5 l)

Oil Capacity

3.05 qts. (2.89 l)

Gearcase Oil Capacity

N/A

Height

48.75 in. (123.2 cm)

Length

114 in. (289 cm)

Designed Width

48 in. (122 cm)

Brake Type

Hayes Phantom Lite DOT 4

Drive Clutch Center Distance

10.63 in. (27 cm)

Drive Belt P/N

3211154

Drive Clutch Type/Driven Clutch Type

CVTech PB50 / CVTech Invance

Reverse Transmission

Electronic Reverse

Engine and Cooling

Engine

EC550PM0134

Displacement

544 cc

Cylinders

2

Bore x Stroke (mm)

73.0 x 65.0

Alternator Output

280 watt

Carburetor/Throttle Body

2-Mikuni

Carburetor Model

VM34SS

Idle RPM

1700 +/- 200

Rated Operating RPM

7000 +/- 200

Cooling

Fan Air

Ignition Type

Kokusan 16 Bit ER

Ignition Timing

15° BTDC @ 1600 RPM, 14° BTDC @ 6500 RPM

Spark Plug / Gap

NGK BR9ES / .028 in. (0.70 mm)

Recommended Engine Oil

Polaris Blue 2-Cycle Semi-Synthetic Oil

Recommended Fuel Octane

Minimum 87 non-oxygenated

Carburetor Settings

Main Jet

220

Pilot Jet

45

Jet Needle/Clip Position

6BGY48/#4

Needle Jet

Q-0 (480)

Cutaway

3

Throttle Gap Under CA

6.98 mm / .275 in.

Fuel Screw (from fully seated)

N/A

Air Screw (from fully seated)

1.5 Turns Fixed

Pilot Air Jet

2.5

Carburetor Jetting

* Shaded cells indicate factory settings

ALTITUDE Meters (Feet)

AMBIENT TEMPERATURE

°F

Below
- 30

-30 to - 10

-15 to +5

0 to +20

+15 to +35

+30 to +50

+45 to +65

Above +65

°C

Below
- 34

-34 to - 23

-26 to - 15

-18 to - 7

-9 to +2

-1 to +10

+7 to +18

Above +18

0-600 (0-2000)

Main Jet

240

230

220

220

210

210

200

190

Pilot Jet

45

45

45

45

45

45

45

45

Clip Position

#5

#4

#4

#4

#3

#3

#2

#1

600-1200 (2000-4000)

Main Jet

230

220

210

210

200

190

190

180

Pilot Jet

45

45

45

45

45

45

45

45

Clip Position

#4

#4

#4

#3

#3

#2

#2

#1

1200-1800 (4000-6000)

Main Jet

210

200

200

195

190

180

180

170

Pilot Jet

45

45

45

45

45

45

45

45

Clip Position

#4

#4

#3

#3

#2

#2

#2

#1

1800-2400 (6000-8000)

Main Jet

200

190

185

180

170

165

160

160

Pilot Jet

45

45

45

45

45

45

45

45

Clip Position

#4

#4

#3

#3

#2

#2

#1

#1

2400-3000 (8000- 10000)

Main Jet

190

180

170

165

160

155

150

150

Pilot Jet

45

45

45

45

45

45

45

45

Clip Position

#4

#3

#3

#2

#2

#1

#1

#1

3000-3700 (10000- 12000)

Main Jet

170

160

155

150

150

145

140

140

Pilot Jet

45

45

45

45

45

45

45

45

Clip Position

#4

#3

#2

#2

#1

#1

#1

#1

The carburetor jetting chart above is consistent with the provisions of U.S.A. federal regulation 40 CFR 1051.115(d)(3) and is an acceptable alternative to the use of tamper-resistant features.

Clutching

INDY 121

ALTITUDE Meters (Feet)

Drive Clutch Shift Weight

Drive Clutch Spring

Driven Clutch Spring

Driven Helix

Chaincase Gearing/ Pitch

*Shaded cells indicate factory settings

0-600 (0-2000)

2205307-43 gr (1 ea)
2205309-3.2 g (3 ea)

7044154
202-292
CVT 1151-1135

7044155
90-112
CVT 5951-1006

Fixed

18:42
72P

600-1200 (2000-4000)

1200-1800 (4000-6000)

2205308-21 gr (1 ea)
2205309-3.2 g (8 ea)

1800-2400 (6000-8000)

2205308-21 gr (1 ea
2205309-3.2 g (7 ea)

2400-3000 (8000-10000)

2205308-21 gr (1 ea
2205309-3.2 g (6 ea)

3000-3600 (10000-12000)

2205308-21 gr (1 ea
2205309-3.2 g (5 ea)

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