{"id":22883,"date":"2022-09-24T11:20:18","date_gmt":"2022-09-24T16:20:18","guid":{"rendered":"https:\/\/discountrcparts.com\/?post_type=product&#038;p=22883"},"modified":"2026-03-27T20:38:25","modified_gmt":"2026-03-28T01:38:25","slug":"lrp-z-21r-spec-4-21-31-port-nitro-engine-w-pull-start-lrp32173","status":"publish","type":"product","link":"https:\/\/discountrcparts.com\/index.php\/product\/lrp-z-21r-spec-4-21-31-port-nitro-engine-w-pull-start-lrp32173\/","title":{"rendered":"LRP Z.21R Spec.4 .21 3+1-Port Nitro Engine w\/Pull-Start LRP32173"},"content":{"rendered":"<p>The LRP Z.21R Spec.4 .21 Pull-Start Nitro Engine is performance-optimised for an unequalled power delivery. This is the perfect entry into the LRP Nitro engine world, and is a great option as a replacement for existing .21 RTR engines. The Z.21R Spec.4 features a special timing for even more power compared to its forerunner, while remaining easy to setup and tune.<\/p>\n<p><strong>Features:<\/strong><\/p>\n<ul>\n<li>Perfect upgrade for existing .21 RTR type engines<\/li>\n<li>Great Value<\/li>\n<li>XTEC PowerCarb3 15S-2 carburetor &#8211; Flow optimized carburetor with 9.0mm insert for maximum power and easy adjustability at the same time<\/li>\n<li>Universal fit &#8211; Fits all major .21 engine mounts<\/li>\n<li>3 + 1 Ports<\/li>\n<li>Standard plug head button &#8211; Guarantees easy adjustment of the engine in all conditions<\/li>\n<li>XTEC T6 engine housing &#8211; Especially reinforced heavy duty engine housing for toughest offroad action<\/li>\n<li>Power Start capable &#8211; Prepared for the use of the optional LRP Power Start (not included) for starting the engine at the push of one button<\/li>\n<\/ul>\n<p><strong>Specifications:<br \/>\nCubic capacity:\u00a0<\/strong>.21 (3.49 ccm)<br \/>\n<strong>Bore:<\/strong>\u00a016.40mm<br \/>\n<strong>Stroke:<\/strong>\u00a016.40mm<br \/>\n<strong>Power:<\/strong>\u00a02.15 HP (may vary depending on used fuel, muffler and tuning)<br \/>\n<strong>RPM:<\/strong>\u00a035,300 RPM (may vary depending on used fuel, muffler and tuning)<br \/>\n<strong>Number of ports:<\/strong>\u00a03 + 1<br \/>\n<strong>Glow Plug:<\/strong>\u00a0LRP Standard R5 (No. 35051)<br \/>\n<strong>Carburetor:<\/strong>\u00a0XTEC PowerCarb2 15S-2 with 9.0mm venturi<br \/>\n<strong>Weight:<\/strong>\u00a0410g<br \/>\n<strong>Class:<\/strong>\u00a01\/8th Offroad Buggys<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The LRP Z.21R Spec.4 .21 Pull-Start Nitro Engine is performance-optimised for an unequalled power delivery. This is the perfect entry into the LRP Nitro engine world, and is a great option as a replacement for existing .21 RTR engines. The Z.21R Spec.4 features a special timing for even more power compared to its forerunner, while [&hellip;]<\/p>\n","protected":false},"featured_media":22737,"template":"","meta":[],"product_brand":[],"product_cat":[407],"product_tag":[406],"class_list":{"0":"post-22883","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-lrp","7":"product_tag-nitro-engine","8":"product_shipping_class-free","10":"first","11":"outofstock","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LRP Z.21R Spec.4 .21 3+1-Port Nitro Engine w\/Pull-Start LRP32173 - Discount RC Parts<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/discountrcparts.com\/index.php\/product\/lrp-z-21r-spec-4-21-31-port-nitro-engine-w-pull-start-lrp32173\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LRP Z.21R Spec.4 .21 3+1-Port Nitro Engine w\/Pull-Start LRP32173 - Discount RC Parts\" \/>\n<meta property=\"og:description\" content=\"The LRP Z.21R Spec.4 .21 Pull-Start Nitro Engine is performance-optimised for an unequalled power delivery. 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