Tech Articles


Repository for all long term Technical Articles on the Road Star Clinic. The list is quite long, so we encourage you to use the site search if you know what you are looking for. You can search for individual words (ie:carburetor, tire, etc...) or short terms (searches are full text for each article).

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  • Check your float bowl level

    Check your float bowl level

    Float Adjustment Procedure

    Some symptons of a too high level are,
    • The choke does not work properly.
    • You'll see liquid spitting in the end of the exhaust after initial start up.
    • The carbon deposit will not be uniform and you'll see streaks or liquid stains.
    • Your exhaust pipes are eternally black no matter what you set your jetting at.

    Use a good set of needle nose vise grips to break the tightness of the screws that hold the float bowl to the carburetor body. Others have...
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    Last edited by Tykes_Place; 03-03-2018, 03:43 PM.

  • Bulldogs Carb Jetting Primer - How to Dial it in

    Bulldogs Carb Jetting Primer - How to Dial it in

    David is a Technical Moderator, for Baron's Custom Accessories Technical Forum

    I thought I would explain basic carb and jetting functions so everyone could better understand how it all works.

    These carbs have two primary fuel circuits; the slow/pilot circuit and the main circuit, which have several parts or components that will effect the mixture at different throttle positions. There are 4 throttle positions that are used to determine what component is effecting the mixture....
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  • Adjustable PMS for the Road Star

    Adjustable PMS for the Road Star

    Disclaimer: I am not responsible for you screwing up your ride, yourself or someone else by you making this modification. This is what I did and it works OK for me. Don’t blame me if you are a D.A (and I don’t mean district attorney) because you trashed your carburetor or set yourself on fire with the soldering iron from the gas you did not empty from the carb.

    Tools and Materials Used:
    • - Soldering iron
    • - Solder - I used silver solder because it is stiffer. It is available at your
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  • Change the Float Bowl Needle Valve (and lose your fuel pump)

    Change the Float Bowl Needle Valve (and lose your fuel pump)


    Reason for changing the STOCK needle float valve set

    I own a 2000 Silverado, and love this bike. Shortly after I had the bike broken in, I decided to see what our rides could do flat out. Well at just under 100MPH, the bike stuttered a bit and began missing. I attributed that to the “REV LIMITER” kicking in. To make a long story short, this spring, still with the same bike, but now with Samson Shogun 2 ¼ inch full pipe system and...
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    Last edited by Tykes_Place; 03-03-2018, 06:22 PM.

  • Choke knob trim

    Choke knob trim

    This is something you can try if you are running rich or have poor mileage and you can’t seem to solve the problem no matter what you do. It isn’t meant to take the place of a proper float level, correct jetting, and a well sealed system. This will not solve problems caused by running the wrong grade of gas or lugging the motor. It is simply meant to be an additional tool. It has been done on enough bikes to make me believe that everyone should just go ahead and do it.

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  • The Roadstar Noob Checklist

    The Roadstar Noob Checklist

    Here are some common issues that bring many new members to the forum searching for a solution.
    1. The 99 - 03 Roadstars have a transmission recall out. It is a safety recall and Yamaha will repair the problem at no cost you. A cir-clip in the trans can come loose and lock the trans up. The engine has to be torn down to fix it. Contact any dealer local to you and give them the VIN number and they can check the database and tell you if the recall has been done. If it hasn't been done then have them
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  • Front Master Cylinder Ratio Chart

    Front Master Cylinder Ratio Chart

    Front Master Cylinder Ratio Chart

    Reprinted by Permission from

    Front Master Cylinder Ratio Chart

    While attending Vintage Days West, and thoroughly enjoying it, I was reminded that many of the people I had occasion to talk to, lacked an understanding of the importance of master cylinder to wheel cylinder ratios. This critical ratio is of paramount importance in determining "feel". It has been my experience that...
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  • Using a Harley Rear Master Cylinder

    Using a Harley Rear Master Cylinder

    Items Needed:
    • Kelsey Hayes type master cylinder: L 1979-1983 Harley FX or 1980-1981 XL Sportster
    • 3/16”x 1” flat stock approximately 4” long.
    • 2 bolts 5/16”x 2 ½”
    • 2 5/16”chrome acorn nuts
    • 1 5/16” x 24 banjo bolt
    • 1 5/16” solid rod (purchase at hardware store)
    • 1 brake light switch for 67-79 Chevy Nova OEM# 1261219

    Getting Started:

    Remove banjo bolt from stock master cylinder and tie brake line up as high as possible with a zip tie. This will avoid too much air...
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    Last edited by Tykes_Place; 02-17-2018, 08:08 PM.

  • Replace your Rear Brake Pads

    Replace your Rear Brake Pads

    Depending on your exhaust, you might have to remove it to obtain access to the rear caliper.

    Remove the two caliper mounting bolts (12 mm hex head socket)

    Remove the brake pad cover (A black plastic cover)

    Remove the Clips from the Pad Pins then remove the Pad Pins

    The Brake Pad Spring lifts up (Denote that the spring has an arrow designating the direction of rotation of the rotor upon the top, see location of arrow 3 pictures...
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  • Apply 3M Protective Film On The Road Star Fuel Tank

    Apply 3M Protective Film On The Road Star Fuel Tank

    Reprinted by Permission from Mr Tidy's Tech Tips

    Below are the scans Jeff has provided, he also has stated that the 2000 might have a different Pinstripe layout than the 99' does These are for the 1999' Road Star You might have to modify these for a 2000 model
    Check and make sure the patterns
    fit your pinstripe theme before you
    start cutting your 3M Film

    Left-side pattern

    Right- side pattern
    Go to post
    Last edited by Tykes_Place; 02-16-2018, 12:13 AM.
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