{"id":643,"date":"2026-05-25T02:22:06","date_gmt":"2026-05-25T02:22:06","guid":{"rendered":"http:\/\/motobikemas.com\/product\/90-100-16-kids-motocross-motorcycle-mousse-mini-dirt-bikes\/"},"modified":"2026-05-27T04:22:04","modified_gmt":"2026-05-27T04:22:04","slug":"90-100-16-kids-motocross-motorcycle-mousse-mini-dirt-bikes","status":"publish","type":"product","link":"https:\/\/motobikemas.com\/ja\/product\/90-100-16-kids-motocross-motorcycle-mousse-mini-dirt-bikes\/","title":{"rendered":"90\/100-16 \u30df\u30cb\u30c0\u30fc\u30c8\u30d0\u30a4\u30af\uff06\u30d4\u30c3\u30c8\u30d0\u30a4\u30af\u7528\u30ad\u30c3\u30ba\u30e2\u30c8\u30af\u30ed\u30b9\u30e2\u30fc\u30bf\u30fc\u30b5\u30a4\u30af\u30eb\u30e0\u30fc\u30b9"},"content":{"rendered":"<h2>Professional 90\/100-16 Kids Motocross Motorcycle Mousse for Mini Dirt Bikes, Pit Bikes &amp; Youth MX<\/h2>\n<p>The Motobike Mas 90\/100-16 kids motocross motorcycle mousse is a closed-cell nitrile rubber foam tire insert engineered for the rear wheels of youth motocross bikes, mini dirt bikes, and pit bikes with 16-inch rear rims. Designed specifically for junior racers, this compact mousse insert completely replaces the inner tube to eliminate pinch flats, reduce unsprung rotating mass, and deliver consistent traction that helps young riders develop their skills with confidence.<\/p>\n<p>Available in soft, medium, and standard density formulations, the 90\/100-16 mousse fits the most common rear tire size for competitive youth motocross classes (65cc-85cc) and pit bike racing. As a Tianjin, China-based B2B manufacturer, Motobike Mas offers OEM private labeling, custom hardness formulations, and direct factory wholesale pricing for dealers, distributors, and race teams worldwide.<\/p>\n<hr \/>\n<h2>\u6280\u8853\u4ed5\u69d8<\/h2>\n<table>\n<tbody>\n<tr>\n<td><strong>Size<\/strong><\/td>\n<td>90\/100-16<\/td>\n<\/tr>\n<tr>\n<td><strong>Fitment<\/strong><\/td>\n<td>90\/100-16 rear tires (youth MX, mini dirt bike, pit bike)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7d20\u6750<\/strong><\/td>\n<td>Closed-cell nitrile rubber foam<\/td>\n<\/tr>\n<tr>\n<td><strong>Density Options<\/strong><\/td>\n<td>Soft, Medium, Standard<\/td>\n<\/tr>\n<tr>\n<td><strong>Weight<\/strong><\/td>\n<td>Approx. 0.7-0.9 kg<\/td>\n<\/tr>\n<tr>\n<td><strong>Rotating Mass Reduction<\/strong><\/td>\n<td>Up to 40% vs. tube + heavy-duty rim lock<\/td>\n<\/tr>\n<tr>\n<td><strong>Effective Pressure Equivalent<\/strong><\/td>\n<td>8-12 psi<\/td>\n<\/tr>\n<tr>\n<td><strong>Service Life<\/strong><\/td>\n<td>200-500 racing miles typical<\/td>\n<\/tr>\n<tr>\n<td><strong>Country of Origin<\/strong><\/td>\n<td>Tianjin, China<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Key Benefits for Junior Riders<\/h2>\n<h3>Complete Flat Prevention for Youth Racing<\/h3>\n<p>For young riders learning to jump, corner, and navigate rough terrain, pinch flats are a frequent frustration that cuts practice and race time short. The 90\/100-16 kids mousse eliminates rear pinch flats entirely \u2014 no more DNFs from flat tires at the most critical moments of a youth moto. Parents and mechanics can send junior racers to the gate with total confidence.<\/p>\n<h3>Reduced Rotating Mass for Smaller Bikes<\/h3>\n<p>On smaller-displacement youth bikes, every bit of power matters. By eliminating the inner tube and heavy rim lock, the 90\/100-16 mousse reduces unsprung rotating mass at the rear wheel by up to 40%. The result is noticeably quicker acceleration out of corners, easier bike handling for smaller riders, and reduced strain on the suspension \u2014 helping young riders corner with greater confidence.<\/p>\n<h3>Consistent Performance Builds Skills<\/h3>\n<p>Unlike pneumatic tires where rear tire pressure changes with temperature and riding time, a mousse insert delivers identical traction and damping from the first practice lap to the last moto. This consistency is invaluable for developing riders \u2014 it removes the variable of changing tire feel and lets them focus on technique and line choice.<\/p>\n<h3>Lower Effective Pressure for Maximum Traction<\/h3>\n<p>The 90\/100-16 mousse allows effective pressures as low as 8 psi with zero risk of pinch flats. In loose conditions, wet tracks, and soft terrain typical of youth MX tracks, this translates directly to more rear-wheel traction and drive out of corners \u2014 helping young riders carry more speed.<\/p>\n<h3>No Maintenance for Parents &amp; Teams<\/h3>\n<p>Once installed, the kids mousse requires zero maintenance for the life of the tire. No air pressure checks before practice sessions, no valve stem inspections between motos, no gauges or pumps needed. For parents managing multiple kids at race events, this eliminates a significant pre-race task and reduces stress on race day.<\/p>\n<hr \/>\n<h2>Hardness Options Guide<\/h2>\n<p>Selecting the correct mousse hardness for youth bikes is especially important \u2014 the wrong density can overwhelm a lightweight bike or young rider.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Density<\/th>\n<th>Effective Pressure<\/th>\n<th>Best Terrain<\/th>\n<th>Rider Weight<\/th>\n<\/tr>\n<tr>\n<td><strong>\u30bd\u30d5\u30c8<\/strong><\/td>\n<td>8-10 psi<\/td>\n<td>Mud, sand, wet tracks, soft terrain<\/td>\n<td>Under 35 kg<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30df\u30c7\u30a3\u30a2\u30e0<\/strong><\/td>\n<td>9-11 psi<\/td>\n<td>Mixed terrain, all-around youth MX<\/td>\n<td>35-50 kg<\/td>\n<\/tr>\n<tr>\n<td><strong>Standard<\/strong><\/td>\n<td>10-12 psi<\/td>\n<td>Hard-packed, rocky, high-speed tracks<\/td>\n<td>Over 50 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Selection Guide for 90\/100-16 Kids Mousse<\/h3>\n<ul>\n<li><strong>Choose Soft<\/strong> for riders under 35 kg, wet or loose conditions, and beginner to intermediate riders who need maximum rear-wheel traction and plushness.<\/li>\n<li><strong>Choose Medium<\/strong> as the default for most youth MX riders \u2014 the best balance of traction, durability, and support for the 65cc and 85cc classes.<\/li>\n<li><strong>Choose Standard<\/strong> for heavier youth riders, aggressive intermediate\/advanced racers, hard-packed tracks, or pit bike racing where higher speeds generate more heat.<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e92\u63db\u6027<\/h2>\n<p>This 90\/100-16 kids mousse insert fits all standard 90\/100-16 rear tires \u2014 the most common rear wheel size for competitive youth motocross and pit bikes.<\/p>\n<h3>Youth Motocross Bikes (65cc)<\/h3>\n<ul>\n<li>KTM 65 SX<\/li>\n<li>Husqvarna TC 65<\/li>\n<li>GasGas MC 65<\/li>\n<li>Kawasaki KX65<\/li>\n<li>Yamaha YZ65<\/li>\n<li>Cobra CX65<\/li>\n<\/ul>\n<h3>Youth Motocross Bikes (85cc)<\/h3>\n<ul>\n<li>Kawasaki KX85 (rear wheel)<\/li>\n<li>KTM 85 SX (rear wheel)<\/li>\n<li>Husqvarna TC 85 (rear wheel)<\/li>\n<li>Yamaha YZ85 (rear wheel)<\/li>\n<li>Suzuki RM85 (rear wheel)<\/li>\n<li>GasGas MC 85 (rear wheel)<\/li>\n<li>Cobra CX85<\/li>\n<\/ul>\n<h3>Pit Bikes &amp; Mini Motocross<\/h3>\n<ul>\n<li>Honda CRF110F (aftermarket performance builds with 16-inch rear conversion)<\/li>\n<li>SSR 125cc \/ 140cc pit bikes (16-inch rear models)<\/li>\n<li>YCF 125cc \/ 155cc pit bikes<\/li>\n<li>Pitster Pro 125cc \/ 155cc (16-inch rear)<\/li>\n<li>KaYo 125cc pit bikes<\/li>\n<li>Thumpstar 125cc \/ 140cc<\/li>\n<\/ul>\n<hr \/>\n<h2>Kids Mousse vs. Standard Inner Tube \u2014 Comparison<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Factor<\/th>\n<th>Kids Mousse (90\/100-16)<\/th>\n<th>Inner Tube<\/th>\n<\/tr>\n<tr>\n<td><strong>Flat prevention<\/strong><\/td>\n<td>100% \u2014 no flats possible<\/td>\n<td>Frequent pinch flats on landings<\/td>\n<\/tr>\n<tr>\n<td><strong>Performance consistency<\/strong><\/td>\n<td>Identical lap after lap<\/td>\n<td>Changes with temperature<\/td>\n<\/tr>\n<tr>\n<td><strong>Maintenance<\/strong><\/td>\n<td>Zero \u2014 install and forget<\/td>\n<td>Check pressure before every ride<\/td>\n<\/tr>\n<tr>\n<td><strong>Rotating mass<\/strong><\/td>\n<td>Lower \u2014 easier for kids to maneuver<\/td>\n<td>Higher<\/td>\n<\/tr>\n<tr>\n<td><strong>Installation<\/strong><\/td>\n<td>More difficult (adult assistance required)<\/td>\n<td>Easier<\/td>\n<\/tr>\n<tr>\n<td><strong>Cost per season<\/strong><\/td>\n<td>Lower \u2014 no tube replacements from pinch flats<\/td>\n<td>Multiple tube replacements typical<\/td>\n<\/tr>\n<tr>\n<td><strong>Confidence for young riders<\/strong><\/td>\n<td>Higher \u2014 no fear of flats<\/td>\n<td>Can be disrupted by flat-related DNFs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Maintenance and Service Life<\/h2>\n<h3>Expected Lifespan<\/h3>\n<p>A 90\/100-16 kids mousse insert typically lasts between 200 and 500 racing miles, depending on terrain, rider weight, riding speed, and lubrication during installation. Given the lighter rider weights and lower power outputs of youth bikes, these mousses often last longer than full-size equivalents.<\/p>\n<h3>Signs It Needs Replacement<\/h3>\n<ul>\n<li>Mousse feels noticeably softer or spongy compared to new<\/li>\n<li>Visible tears, chunks missing, or deformation<\/li>\n<li>Reduced traction \u2014 bike feels vague or loose in corners<\/li>\n<li>Excessive heat during use (mousse should be warm, not hot)<\/li>\n<\/ul>\n<h3>Storage Tips<\/h3>\n<ul>\n<li>Store in a cool, dry place away from direct sunlight<\/li>\n<li>Do not store compressed or folded<\/li>\n<li>Keep away from ozone sources (electric motors, welding equipment)<\/li>\n<li>Shelf life in sealed packaging: 3-5 years<\/li>\n<\/ul>\n<hr \/>\n<h2>Installation Guide<\/h2>\n<ol>\n<li>Remove existing tire and tube from rim completely<\/li>\n<li>Clean 16-inch rim bead seat area thoroughly<\/li>\n<li>Apply mousse lubricant generously inside the tire casing<\/li>\n<li>Apply lubricant to the 90\/100-16 mousse insert itself<\/li>\n<li>Insert mousse into tire, working evenly around the casing<\/li>\n<li>Mount one bead onto the rim using tire irons<\/li>\n<li>Seat second bead carefully to avoid pinching the mousse<\/li>\n<li>Inflate briefly to seat beads, then release air<\/li>\n<\/ol>\n<p><strong>Important:<\/strong> Never use petroleum-based lubricants on mousse inserts \u2014 they degrade nitrile rubber. Use only water-based mousse lubricant. Adult assistance is recommended for installation on youth bike wheels as the smaller rim diameter requires careful technique to avoid damaging the mousse.<\/p>\n<hr \/>\n<h2>B2B Wholesale \u2014 Why Partner with Motobike Mas?<\/h2>\n<p>Motobike Mas is a Tianjin, China-based manufacturer of mousse inserts for off-road motorcycle racing tires. We supply dealers, distributors, race teams, and aftermarket brands worldwide with factory-direct pricing and full customization.<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong>Factory Pricing<\/strong><\/td>\n<td>Direct wholesale \u2014 no middlemen<\/td>\n<\/tr>\n<tr>\n<td><strong>OEM \/ Private Label<\/strong><\/td>\n<td>Custom branding, packaging, and colors<\/td>\n<\/tr>\n<tr>\n<td><strong>Custom Formulations<\/strong><\/td>\n<td>Adjust density and material properties for youth-specific applications<\/td>\n<\/tr>\n<tr>\n<td><strong>MOQ<\/strong><\/td>\n<td>Contact for minimums<\/td>\n<\/tr>\n<tr>\n<td><strong>Shipping<\/strong><\/td>\n<td>Sea (FOB Tianjin), air freight, DDP available<\/td>\n<\/tr>\n<tr>\n<td><strong>Samples<\/strong><\/td>\n<td>Pre-production samples for evaluation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Related Products<\/h2>\n<ul>\n<li><a href=\"https:\/\/motobikemas.com\/ja\/product\/70-100-19-front-wheel-motorcycle-mousse-for-motocross-dirt-bikes\/\">70\/100-19 Front Wheel Motorcycle Mousse<\/a> \u2014 Front mousse for youth MX and pit bikes<\/li>\n<li><a href=\"https:\/\/motobikemas.com\/ja\/product\/80-100-21-professional-enduro-mousse-off-road-motorcycle-front-tires\/\">80\/100-21 Professional Enduro Mousse<\/a> \u2014 Front mousse for full-size MX bikes<\/li>\n<li><a href=\"https:\/\/motobikemas.com\/ja\/product\/100-90-19-high-performance-motorcycle-mousse-for-motocross-tires\/\">100\/90-19 High Performance Motorcycle Mousse<\/a> \u2014 Rear wheel mousse for MX and enduro<\/li>\n<li><a href=\"https:\/\/motobikemas.com\/ja\/product\/110-90-19-motocross-mousse-insert-mx-dirt-bike-racing\/\">110\/90-19 Motocross Mousse Insert<\/a> \u2014 Rear wheel mousse for full-size MX bikes<\/li>\n<\/ul>\n<hr \/>\n<h2>Frequently Asked Questions<\/h2>\n<h3>What bikes use a 90\/100-16 rear tire?<\/h3>\n<p>The 90\/100-16 rear tire size is standard on youth motocross bikes in the 65cc and 85cc classes, including KTM 65 SX, Kawasaki KX65\/KX85, Yamaha YZ65\/YZ85, Husqvarna TC 65\/TC 85, Suzuki RM85, GasGas MC 65\/MC 85, and many pit bikes with 16-inch rear rims.<\/p>\n<h3>Is 90\/100-16 compatible with Honda CRF110F?<\/h3>\n<p>The Honda CRF110F comes stock with a smaller rear tire size. However, many aftermarket performance builds convert to 16-inch rear rims, making the 90\/100-16 mousse suitable for upgraded CRF110F pit bike race builds.<\/p>\n<h3>How is a kids mousse different from an adult mousse?<\/h3>\n<p>While the material and construction are the same, the 90\/100-16 kids mousse is smaller, lighter, and uses density ranges optimized for lower rider weights and lower power outputs. The soft formulation is particularly important for youth applications, where an overly firm mousse can overwhelm a lightweight bike.<\/p>\n<h3>Will a mousse make my child&#8217;s bike faster?<\/h3>\n<p>A mousse won&#8217;t increase engine power, but by reducing rotating mass at the rear wheel, it allows the bike to accelerate more quickly and handle more responsively. Many young riders notice an immediate improvement in cornering confidence and overall bike maneuverability.<\/p>\n<h3>Does Motobike Mas offer samples before bulk orders?<\/h3>\n<p>Yes. B2B clients can request samples for evaluation before committing to volume orders. Contact our sales team to arrange sample shipments.<\/p>\n<h3>What is the lead time for OEM orders?<\/h3>\n<p>Typical lead time is 15-30 days for standard OEM production, depending on quantity and customization requirements.<\/p>","protected":false},"excerpt":{"rendered":"<p>The Motobike Mas 90\/100-16 kids motocross motorcycle mousse is a nitrile rubber foam tire insert for youth MX, mini dirt bikes &amp; pit bike rear wheels. Eliminates flats. B2B wholesale from Tianjin, China.<\/p>","protected":false},"featured_media":607,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[18],"product_tag":[181,171,172,167,182,185,175,186,177,168,173,178,170,183,176,184,180,169,179,174],"class_list":["post-643","product","type-product","status-publish","has-post-thumbnail","product_cat-motorcycle-mousse","product_tag-16-inch-rim","product_tag-65cc-rear","product_tag-85cc-rear","product_tag-90-100-16","product_tag-beginner-friendly","product_tag-cost-effective-racing","product_tag-crf110-build","product_tag-growing-rider","product_tag-junior-development","product_tag-kids-mousse","product_tag-kx65","product_tag-learn-to-jump","product_tag-mini-mx","product_tag-parent-mechanic","product_tag-pit-bike-racing","product_tag-race-day-prep","product_tag-small-wheel-mousse","product_tag-youth-dirt-bike","product_tag-youth-traction","product_tag-yz65","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.1 (Yoast SEO v25.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>90\/100-16 Kids Motocross Motorcycle Mousse for Mini Dirt Bikes &amp; Pit Bikes | Motobike Mas<\/title>\n<meta name=\"description\" content=\"B2B wholesale 90\/100-16 kids motocross motorcycle mousse for mini dirt bikes, pit bikes &amp; youth MX rear wheels. 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