Difficulty starting cold engine 2002 yamaha roadstar

SOURCE: 2002 Yamaha V-Star Classic 1100 Will not run over 70 MPH

Hi,
The first thing you need to check is the air filter. Sometimes critters can get into the airbox when a bike sits for awhile. Sounds crazy, but it has happened to me. If nothing is blocking the filter, give it a quick clean since you have it out.
Next things to check:
Faulty diaphragm
Improperly adjusted fuel level
Clogged or loose main jet
Faulty fuel pump
You may not be able to check these on your own, but these are the next likely culprits.
Hope this helped

SOURCE: my 00 yamaha r6 has a rumbleing noise from engine

You may have a case of pre-ignition, otherwise known as engine knock. Ask the dealer what the stock spark plug should be then get plugs one step colder than stock. Next, use the gas in the tank for your lawnmower and refill the tank with premium gas. Be sure the gear box oil level is good and the chain gets a shot of lubrication as well. The gear oil and chain oil is to lessen the load on the engine. You should notice a difference in about 50 miles or so.

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SOURCE: My Yamaha Vino 50 starts OK but stumbles and

Choke may not be working.

SOURCE: Yamaha XV17 Runs For A Minute - Then Dies

The dealer is not interested.
The bike is set up very lean to meet emissions standards. Any of them will benefit from larger jets. It's probably running too lean.

SOURCE: Paint codes for 2005 Yamaha Roadstar Black & white

http://www.colorrite.com/matrix-colors.cfm?CFID=1620536&CFTOKEN=74145802

Go here my friend.

Bob