DATE:  May 23, 2023. SUBJECT. FRAME JOINT QUICK-RELEASE ADJUSTMENT. The tension adjustment bolt on the frame joint quick-release mechanism, hereafter referred to as QR & QR-Adjustment Bolt can come out of adjustment when left in the open position, su

<p><strong>DATE:</strong>&#xA0; May 23, 2023</p><p id="isPasted"><strong><span style="color: rgb(255, 255, 255); background-color: rgb(0, 0, 0);">&#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; SUBJECT &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;</span></strong></p><p><strong>FRAME JOINT QUICK-RELEASE ADJUSTMENT</strong></p><p>The tension adjustment bolt on the frame joint quick-release mechanism, hereafter referred to as QR &amp; QR-Adjustment Bolt can come out of adjustment when left in the open position, such as when transporting the bike in the folded position. To remedy this, replace the original QR Adjustment Bolt with our updated version, p/n 881011, which includes applied Loctite on the threads to prevent accidental rotation of the QR-Adjustment Bolt. Any rotation, clockwise or counterclockwise, will affect the QR tension. The rider should check the QR tension on the frame joint and inspect the frame for any signs of cracking before each ride. Failure to maintain adequate QR tension at the the frame joint can damage the frame and QR mechanism.</p><p><br></p><p id="isPasted"><strong><span style="color: rgb(255, 255, 255); background-color: rgb(0, 0, 0);">&#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;MODELS &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;&#xA0;</span></strong></p><p><strong>MODEL(S):</strong>&#xA0; Sun Bicycles - Shortcut Folding Bikes</p><ul><li>P/N 670295 - Shortcut 1 - Satin Black</li><li>P/N 670296 - Shortcut 3 - Blue Pearl</li><li>P/N 670297 - Shortcut 7 - Slate</li></ul><p style="text-align: left;"><img src="https://attachments.gorgias.help/w3vx/hc/vm5v/670295-7c97851d-c11b-4a38-aef6-0b4d4060f4de.png" style="width: 667px;" class="fr-fic fr-dib"><img src="https://attachments.gorgias.help/w3vx/hc/vm5v/670296-0932b603-17c2-4580-93e8-c53897e91628.png" style="width: 692px;" class="fr-fic fr-dib"></p><p><img src="https://attachments.gorgias.help/w3vx/hc/vm5v/670297-fb7b84ac-e21b-47d3-8a8d-31b920613dd7.png" style="width: 692px;" class="fr-fic fr-dib"></p><p><br></p><p><br></p><p id="isPasted"><strong><span style="color: rgb(255, 255, 255); background-color: rgb(0, 0, 0);">&#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;ACTION REQUIRED &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;</span></strong></p><p>Replace the original bolt with the new version, which has pre-applied Loctite. &#xA0;Contact your local Sun retailer to arrange this quick and easy replacement. &#xA0;</p><p><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">1. &#xA0;Remove the original Quick-Release Lever Tension Adjustment Bolts</span></p><p><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">2. &#xA0;Replace the original bolt with the updated Quick-Release Lever Tension Adjustment Bolt, which has applied Loctite on the threads. &#xA0;</span><span style="color: rgb(184, 49, 47); background-color: rgb(255, 255, 255);">IF ASSEMBLING A NEW BIKE, CHECK THE BIKE CARTON FOR A NEW HARDWARE PACKET THAT CONTAINS THE NEW BOLT.</span></p><p><img src="https://attachments.gorgias.help/w3vx/hc/vm5v/img_4449-ef4b460f-7c1b-42d5-a9a2-7343e242ac3c.jpeg" style="width: 563px;" class="fr-fic fr-dib"></p><p><br></p><p><img src="https://attachments.gorgias.help/w3vx/hc/vm5v/img_4447-e62a5dbd-f81f-4f68-bfdb-4208a5c61d4c.jpeg" style="width: 564px;" class="fr-fic fr-dib"></p><p><br></p><p id="isPasted"><strong><span style="color: rgb(255, 255, 255); background-color: rgb(0, 0, 0);">&#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; REPLACEMENT PARTS LIST &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;</span></strong></p><p><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">P/N 881011 - Folding Frame Quick-Release Lever Tension Adjustment Bolt with applied Loctite.</span></p><p><br></p><p id="isPasted"><strong><span style="color: rgb(255, 255, 255); background-color: rgb(0, 0, 0);">&#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;CONTACT &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0; &#xA0;&#xA0;</span></strong></p><p><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">For questions about this matter, please contact your local Sun Bicycles retailer. &#xA0;Click&#xA0;</span><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"><a class="fr-strong fr-green" href="https://sun.bike/pages/store-locator">HERE</a></span><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">&#xA0;to locate a Sun Bicycles retailer in your area.</span></p>

Sun Folding Bike Service Bulletin

Distributed by J&B Importers, Inc. | Miami, FL. California does not impose a statewide minimum age requirement for operating a Class 2 electric bicycle. Local laws may impose additional restrictions.

<div style="max-width:850px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#333333;line-height:1.6;"><div style="text-align:center;padding:32px 24px 28px 24px;background-color:#fafafa;border-bottom:3px solid #222222;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-f3f910da-9bef-4d7a-b5a5-41c36fafe92c-dc74546d-0560-4b67-937b-502edb959185.png" alt="California" style="width: 81px; height: 81px; border: 0px;" class="fr-fic fr-dii"><div style="font-size:13px;font-weight:bold;letter-spacing:2px;text-transform:uppercase;color:#777777;margin-bottom:5px;">California</div><h1 style="margin:0;font-size:30px;line-height:1.2;color:#222222;" id="e-bike-disclosures--safety-information">E-Bike Disclosures &amp; Safety Information</h1><div style="margin-top:9px;font-size:18px;color:#666666;"><strong>Sun Bicycles</strong> &#xA0; | &#xA0; <strong>E350 B1</strong> &#xA0; | &#xA0; <strong>P/N 671396</strong></div><p><strong>&#xA0;<span style="font-size:12px;">&#xA0;Distributed by J&amp;B Importers, Inc. | Miami, FL&#xA0;</span>&#xA0;</strong></p></div><table style="width:100%;border-collapse:separate;border-spacing:8px;margin-top:24px;text-align:center;"><tbody><tr><td style="width:25%;padding:22px 8px 20px;background-color:#f5f5f5;border:1px solid #e0e0e0;vertical-align:top;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100215-0e3e9c19-8189-4bde-a0db-b3cb90e13834-76402cf0-1564-402a-882c-922809a8b016.png" alt="E-Bike Class" style="height: 62.693878px; width: 96px; max-width: 100%;" class="fr-fic fr-dii"><div style="font-size:24px;line-height:1.2;font-weight:bold;color:#222222;">CLASS 2</div><div style="font-size:13px;color:#777777;margin-top:7px;">E-Bike Class</div></td><td style="width:25%;padding:22px 8px 20px;background-color:#f5f5f5;border:1px solid #e0e0e0;vertical-align:top;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-26b6bad5-0161-4bbe-87ca-a9bf013e50cf-89de1602-da16-4b69-9739-c392fb1e6456.png" alt="Maximum Assisted Speed" style="height: 64px; width: auto; max-width: 100%;" class="fr-fic fr-dii"><div style="font-size:24px;line-height:1.2;font-weight:bold;color:#222222;">10 MPH</div><div style="font-size:13px;color:#777777;margin-top:7px;">Max Assist</div></td><td style="width:25%;padding:22px 8px 20px;background-color:#f5f5f5;border:1px solid #e0e0e0;vertical-align:top;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-bbeaee4e-7d66-4aae-8149-6779b987a4ee-14f3fcb4-6a05-4dbe-bf90-4763afd29bd1.png" alt="Continuous Motor Power" style="height: 64px; width: auto; max-width: 100%;" class="fr-fic fr-dii"><div style="font-size:24px;line-height:1.2;font-weight:bold;color:#222222;">350W</div><div style="font-size:13px;color:#777777;margin-top:7px;">Continuous Power</div></td><td style="width:25%;padding:22px 8px 20px;background-color:#f5f5f5;border:1px solid #e0e0e0;vertical-align:top;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-52fad4d3-e97d-4a22-aeb6-a332a19838ce-5c0b0190-794e-46d2-84f9-f30d022af750.png" alt="Peak Motor Power" style="height: 64px; width: auto; max-width: 100%;" class="fr-fic fr-dii"><div style="font-size:24px;line-height:1.2;font-weight:bold;color:#222222;">672W</div><div style="font-size:13px;color:#777777;margin-top:7px;">Peak Power</div></td></tr></tbody></table><div style="margin-top:34px;"><div style="font-size:13px;font-weight:bold;letter-spacing:1.5px;text-transform:uppercase;color:#888888;margin-bottom:5px;">Rider Information</div><h2 style="font-size:23px;line-height:1.3;margin:0 0 17px;color:#222222;" id="california-rider-requirements">California Rider Requirements</h2><div style="padding:19px 21px;background-color:#f7f7f7;border-left:4px solid #555555;margin-bottom:12px;"><div style="display:flex;align-items:center;gap:15px;"><div style="flex:0 0 64px;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-dbb20223-0327-494a-87c0-df35a7129c1b-ca5f2e67-b05a-4582-9135-c410bd141d1d.png" alt="Age Restrictions" style="width: 54px; height: auto;" class="fr-fil fr-dib"></div><div style="flex:1;min-width:0;"><h3 style="margin:0 0 5px;font-size:19px;line-height:1.3;color:#222222;" id="age-restrictions">Age Restrictions</h3><p style="margin:0;font-size:16px;color:#444444;">California does not impose a statewide minimum age requirement for operating a Class 2 electric bicycle. Local laws may impose additional restrictions.</p></div></div></div><div style="padding:19px 21px;background-color:#fff8e6;border-left:4px solid #d39b00;margin-bottom:12px;"><div style="display:flex;align-items:center;gap:15px;"><div style="flex:0 0 64px;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-8708f7c2-d331-4cc8-8340-82c3d0509f24-34e672c1-a4c3-4a1f-aec5-370eb12497e0.png" alt="Riders Under 16" style="width: 54px; height: auto;" class="fr-fil fr-dib"></div><div style="flex:1;min-width:0;"><h3 style="margin:0 0 5px;font-size:19px;line-height:1.3;color:#222222;" id="riders-under-16">Riders Under 16</h3><p style="margin:0;font-size:16px;color:#444444;">It is recommended that persons under 16 years of age <strong>not operate an electric bicycle at speeds greater than 15 mph.</strong></p></div></div></div><div style="padding:19px 21px;background-color:#f7f7f7;border-left:4px solid #555555;"><div style="display:flex;align-items:center;gap:15px;"><div style="flex:0 0 64px;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-e8585872-4600-4c53-8a09-91f03957d731-73ed23d1-e79e-4c94-8e98-f1667bdba465.png" alt="Helmet Requirements" style="width: 54px; height: auto;" class="fr-fil fr-dib"></div><div style="flex:1;min-width:0;"><h3 style="margin:0 0 5px;font-size:19px;line-height:1.3;color:#222222;" id="helmet-requirements">Helmet Requirements</h3><p style="margin:0;font-size:16px;color:#444444;"><strong>Class 1 &amp; Class 2:</strong> Riders under 18 years of age must wear a properly fitted and fastened bicycle helmet that meets applicable safety standards. <strong>Class 3:</strong> All riders, regardless of age, must wear a helmet. <strong>&#xA0;Regardless of class or age, all electric bicycle riders are encouraged to wear a properly fitted and fastened bicycle helmet.&#xA0;</strong></p></div></div></div></div><div style="margin-top:36px;padding:19px 21px;background-color:#f7f7f7;border-left:4px solid #555555;"><div style="display:flex;align-items:center;gap:15px;"><div style="flex:0 0 64px;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-a877323b-f0b5-4ef1-a6a0-5dddf7e5f290-b8eb3e57-6c63-4e4f-a595-d30d82057157.png" alt="E-Bike Safety and Training" style="width: 54px; height: auto;" class="fr-fil fr-dib"></div><div style="flex:1;min-width:0;"><h3 style="margin:0 0 5px;font-size:19px;line-height:1.3;color:#222222;" id="california-e-bike-safety--training">California E-Bike Safety &amp; Training</h3><p style="margin:0 0 15px;font-size:16px;color:#444444;">For additional information about California electric bicycle laws, safe riding practices, and the California Highway Patrol&apos;s e-bike safety and training program, visit the California Highway Patrol. <a href="https://www.chp.ca.gov/programs-services/services-information/bike-and-ped-safety" target="_blank" rel="noopener noreferrer">&#xA0;https://www.chp.ca.gov/programs-services/services-information/Bike-and-Ped-Safety/&#xA0;</a></p><a href="https://www.chp.ca.gov/Programs-Services/Services-Information/Bike-and-Ped-Safety" target="_blank" rel="noopener noreferrer" style="display:inline-block;padding:12px 20px;background-color:#333333;color:#ffffff;text-decoration:none;font-size:15px;font-weight:bold;">&#xA0;CHP E-Bike Safety &amp; Training&#xA0;</a></div></div></div><div style="margin-top:24px;padding:24px;background-color:#f5f5f5;border:1px solid #dddddd;"><div style="display:flex;align-items:center;justify-content:flex-start;gap:14px;margin-bottom:12px;text-align:left !important;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-3ca4b537-3c7d-4b7e-b6f5-094b4493e853-b50ac0e0-0ae5-464e-980e-b7d0eb014e48.png" alt="California Electric Bicycle Laws" style="width: 44px; height: 28px; flex-shrink: 0;" class="fr-fil fr-dib"><h2 style="font-size:23px;line-height:1.3;margin:0;text-align:left !important;color:#222222;flex:1;" id="california-electric-bicycle-laws">California Electric Bicycle Laws</h2></div><div style="padding-top:6px;"><p>Electric bicycles operated in California are generally subject to the same rules of the road as conventional bicycles. Riders must obey applicable traffic laws, signs, signals, and local regulations.</p><p>Electric bicycles may be operated on roadways, bicycle facilities, paths, and trails where permitted for their class. Local authorities and public agencies may restrict or prohibit electric bicycles, or certain classes of electric bicycles, on particular paths and trails.</p><p>California establishes a 10 mph prima facie speed limit for electric bicycles operated on sidewalks. Local authorities may also establish posted speed limits on bicycle paths and multiuse trails as permitted by California law.</p><p>Electric bicycles, batteries, and related electrical systems sold in California must comply with applicable California electrical and battery safety requirements, including applicable testing and safety standards.</p><p>Electric bicycles must not be modified or tampered with in a manner that causes the bicycle to no longer meet the requirements applicable to an electric bicycle or its designated class.</p><p>Riders are responsible for complying with all applicable state and local laws and should check local regulations before riding.</p></div></div><div style="margin-top:24px;padding:24px;background-color:#f5f5f5;border:1px solid #dddddd;"><div style="display:flex;align-items:center;justify-content:flex-start;gap:14px;margin-bottom:12px;text-align:left !important;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100200-52d65c38-ab87-4178-9954-13fd17709527-75e56069-a612-476e-860d-4c692172d2d1.png" alt="Important Information" style="width: 33px; height: 30px; flex-shrink: 0;" class="fr-fil fr-dib"><h2 style="font-size:23px;line-height:1.3;margin:0;text-align:left !important;color:#222222;flex:1;" id="important-information">Important Information</h2></div><div style="padding-top:6px;"><p style="margin:0;font-size:16px;color:#444444;">Local jurisdictions may establish additional rules or restrictions regarding electric bicycle use. Riders are responsible for complying with all applicable state and local laws.</p></div></div><div style="margin-top:24px;padding:24px;background-color:#fff3f3;border:1px solid #e2c5c5;"><div style="display:flex;align-items:center;justify-content:flex-start;gap:14px;margin-bottom:12px;text-align:left !important;"><img src="https://attachments.gorgias.help/RdOkb7orkm2VXGNr/hc/bVpA37lELvxJ5oEd/2026100216-0cd05245-7032-48ca-bf7a-970551908edb-8cf77fd3-baca-429c-9aae-4d72f634a3a9.png" alt="Warning" style="width: 31px; height: 26.068182px; flex-shrink: 0;" class="fr-fil fr-dib"><h2 style="font-size:23px;line-height:1.3;margin:0;text-align:left !important;color:#8a2f2f;flex:1;" id="warning">WARNING</h2></div><div style="padding-top:6px;"><p style="margin:0;font-size:16px;line-height:1.6;color:#444444;">IT IS AGAINST CALIFORNIA LAW FOR A PERSON TO TAMPER WITH, OR MODIFY, AN ELECTRIC BICYCLE SO AS TO CHANGE THE SPEED CAPABILITY OF THE DEVICE IN A MANNER THAT WOULD ALLOW THE DEVICE TO GO FASTER THAN PERMITTED BY LAW. MODIFYING THE DEVICE TO GO FASTER MAY RESULT IN REQUIREMENTS TO OPERATE THE DEVICE WITH AN M1 OR M2 LICENSE ENDORSEMENT, TO REGISTER THE DEVICE WITH THE DEPARTMENT OF MOTOR VEHICLES, AND TO INSURE THE DEVICE AS A MOTORIZED BICYCLE OR MOTORCYCLE.</p></div></div><div style="margin-top:30px;padding:18px 10px;border-top:1px solid #cccccc;text-align:center;"><div style="font-size:13px;color:#777777;">California Electric Bicycle Disclosure | Ver. 10.08.26</div></div></div>

Bulletins and Safety Information

Sun Folding Bike Service Bulletin

E350 B1 Electric Trike – California Disclosures & Safety Information