Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
FJR Motorcycle Forums
Technical & Mechanical Problems
Brake light modulator
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Yamaha FJR Motorcycle Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="ionbeam" data-source="post: 1137519" data-attributes="member: 277"><p>Rapidly flashing an incandescent bulb will also dramatically shorten the bulb life. The <a href="https://www.kriss.com/pdf/modulator-headlamp.pdf" target="_blank">Federal DOT Standard </a>has very specific flash rates for headlight modulators to help retain bulb life. The flash rate specified never lets the headlight bulb's filament completely cool and go off, it only starts to fade before power is applied again. Loosing a tail light bulb (one) isn't as bad as loosing a headlight but still, you need to check regularly to be sure that the bulbs are alive.</p><p></p><p><span style="color: #0000cd"><strong>S7.9.4.1</strong> A headlamp on a motorcycle may be wired to modulate either the upper beam or the lower</span></p><p></p><p>beam from its maximum intensity to a lesser intensity provided that:</p><p></p><p><span style="color: #0000cd">(a The rate of modulation shall be 240 plus-or-minus 40 cycles per minute.</span></p><p></p><p>( b The headlamp shall be operated at maximum power for 50 to 70 percent of each cycle.</p><p></p><p>(c The lowest intensity at any test point shall not be less than 17 percent of the maximum</p><p></p><p>intensity measured at the same point.</p></blockquote><p></p>
[QUOTE="ionbeam, post: 1137519, member: 277"] Rapidly flashing an incandescent bulb will also dramatically shorten the bulb life. The [URL="https://www.kriss.com/pdf/modulator-headlamp.pdf"]Federal DOT Standard [/URL]has very specific flash rates for headlight modulators to help retain bulb life. The flash rate specified never lets the headlight bulb's filament completely cool and go off, it only starts to fade before power is applied again. Loosing a tail light bulb (one) isn't as bad as loosing a headlight but still, you need to check regularly to be sure that the bulbs are alive. [COLOR=#0000cd][B]S7.9.4.1[/B] A headlamp on a motorcycle may be wired to modulate either the upper beam or the lower[/COLOR] beam from its maximum intensity to a lesser intensity provided that: [COLOR=#0000cd](a The rate of modulation shall be 240 plus-or-minus 40 cycles per minute.[/COLOR] ( b The headlamp shall be operated at maximum power for 50 to 70 percent of each cycle. (c The lowest intensity at any test point shall not be less than 17 percent of the maximum intensity measured at the same point. [/QUOTE]
Insert quotes…
Verification
Post reply
FJR Motorcycle Forums
Technical & Mechanical Problems
Brake light modulator
Top