Road Star Stock Componants

Question

The stock Road Star carb is a single 40mm Mikuni, model #BSR40

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Front = 130/90-16 (Dunlop D404FL or Bridgestone G703F)
Rear = 150/80-16 (Dunlop D404 or Bridgestone G702)

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On the 1999 to 2003 models the stock Road Star rims require tubes.
On the 2004 model they are tubless.

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Wet with oil and a full tank of fuel = 332kg/732lbs
Dry without oil or fuel = 307kg/678lbs

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The fuel tank on the Road Star holds a total of 5 US Gallons or 20 Litres

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The Road Star holds a TOTAL of 5 Litres/5.3 US Quarts of oil, but you don’t use that much unless you strip the engine down.
Normally you would use:
4.3USqt/4.1L if you change the oil AND the oil filter
3.9USqt/3.7L if you change only the oil and NOT the oil filter

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How long is a piece of string? This is very hard to answer as there are many many variables that make up effective mileage.
In short, on a properly tuned and jetted bike you can expect around 40-45mpg, even higher.
On a badly setup bike it can go below 35mpg

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Air Injection System. The AIS is in place to burn off any unburnt fuel to make a cleaner exhaust emission to comply with emissions laws

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Headlight: Halogen 12V 60W/55W x1
Tail/brake: 12V 8W/27W x1
Front Signals: 12V 27W/8W x2
Rear Signals: 12V 27W x2
Meter Light: 14V 1.7W x3

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Stage 1 involves removing the cone at the end of your exhaust and drilling 8x half inch holes in the end of each pipe
Stage 2 includes Stage 1 but requires the use of a longer drill bit to drill through the next baffle wall, most believe it is more trouble than it is worth
Stage 3 is removing the cone at the end of your exhaust as per stage 1, cutting away the final baffle plate entirely and then ramming a rod up into the baffle to wriggle the baffle back and forth until it comes out of the exhaust.

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NGK DPR7EA-9
or
Denso X22EPR-U9

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Always measure tire pressure when tires are cold
Front:
0 ~ 198lb = 36psi/250kPa
198lb+ = 36psi/250kPa
High-speed riding = 36psi/250kPa
Rear:
0 ~ 198lb = 36psi/250kPa
198lb+ = 40psi/280kPa
High-speed riding = 40psi/280kPa

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Road Star Warranty

Question

In the U.S. it is 1 year extendable to 4 years with Yamaha’s Y.E.S. program
In Australia it is 2 years with no extension option

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Yamaha Extended Service. The Y.E.S. program is only in the U.S. and allows owners to extend their warranty out to four years

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Changing your airbox or exhaust, or both will not void your warranty PROVIDING you do it properly and that includes any neccassary rejetting of the carb. If you burn your valves out because you replaced your airbox but didn’t rejet, that will not be covered under warranty.

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Removing the AIS and plugging the holes let in the engine with custom made plugs shouldn’t affect your warranty (providing you do it properly), but your bike will probably fail an emissions test technically making it illegal for road use.

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Road Star Carbs and Jetting

Question

#165 Mikuni Main Jet
#35 Mikuni Pilot Jet
2.5 Turns on PMS
Equvilent of 3rd Clip on the needle

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In the U.S. no
In Australia yes (other countries may also vary)

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Depending on the manufacturer, if you only replace your pipes and not your airbox, you may not have to rejet, but always check with the manufacturer’s recommendations. Because if you do damage to your bike because you did not rejet despite manufacturers advice the damage will not be covered under warranty

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Typically yes. Changing your airbox to an aftermarket one usually adds more air to your carb, which in turn can create a lean condition (the fuel mix burns hotter). If you do not re-jet after changing your airbox you may do serious damage to your Road Star’s engine and it won’t be covered under warranty

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Mikuni 42mm, 45mm and 48mm Flatslide carbs
Other carbs have been known to be fitted (such as Webber carbs) although they require extensive modification

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Primary Mixture Screw. The PMS is on the carb and you adjust it to change low range performance and mileage of the Road Star

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The stock Road Star carb is a single 40mm Mikuni, model #BSR40

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Road Star Parts and Accessories

Question

No you don’t. There is a huge range of aftermarket parts available for the Yamaha Road Star now and quite a few of them are much better than Yamaha’s own. Keep well in mind that if you use the wrong part and it causes damage to your Road Star, it and the damage created will not be covered under warranty

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Big Air Kit. A BAK is an airbox and filter offered by Baron’s Customs

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Silverado Saddlebag Brackets for Road Star: Yamaha Part No. STR-5GA73-40-00
Tour Classic Saddlebag Brackets for Road Star : Yamaha Part No. STR-4WM73-40-10

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No you can’t. Yamaha lists different part numbers for the brackets for the Silverado bags and the brackets for the Tour Classic bags. They look very similar but the mounting points for the bags are different. You could make it work if you were very handy with a hacksaw and welding equipement, but it probably isn’t worth your time

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No you can’t. The brackets are different for the Royal Star and can’t be used on the Road Star. You could make it work if you were very handy with a hacksaw and welding equipement, but it probably isn’t worth your time

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Dyna 3000 Ignition Model D3K7-3

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