{"product_id":"mcs516598","title":"MCS Breaker Weight Spring Set. Extreme Duty – 1970–1999 Big Twin; 1971–2003 XL…","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eStronger springs than stock. For a slower advance curve; used to help solve detonation (pinging) issues with compression engines or poor fuel. Less breaker weight rattle during idling and improves idling stability. Note that stronger springs may require carburetor adjustment (richer). OEM replacement reference 32605-70 (which has standard strength springs). Note: 516300 is standard replacement; 516301 is heavy duty; 516598 is extreme duty. Mixing different spring strengths will give additional fine-tuning options.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e70-99 Big Twin (Excl. TC); 71-03 XL Sportster (NU). With mechanical advanced ignition\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e MCS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e ELECTRICAL \u0026gt; ADVANCE UNITS AND PARTS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e PR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 516598\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Motorcycle Storehouse","offers":[{"title":"Default Title","offer_id":57377099743619,"sku":"MCS516598","price":17.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/516598k_8d3d1fb1-4c20-4d2f-8c4b-bfe65b088fef.jpg?v=1775672358","url":"https:\/\/hogparts.com\/products\/mcs516598","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}