{"product_id":"jims-crankcase-lap-tool-for-harley-davidson","title":"Jims Crankcase Lapping Tool for Harley-Davidson","description":"\u003cdiv\u003e Used to lap the pinion bearing race on the right crankcase.\u003c\/div\u003e\n\n\u003cdiv\u003e Removes more material in less time, but with greater precision than a conventional lapping machine.\u003c\/div\u003e\n\n\u003cdiv\u003e The JIMS lapping machine is guided on both sides of the pinion bearing race.\u003c\/div\u003e\n\n \u003cdiv\u003eThis additional support on the cam gear side of the track is achieved by a bolt on the base plate that precisely secures a drill bushing in which the lapping machine rotates.\u003c\/div\u003e\n\n\u003cdiv\u003e This base plate is located on the same pins on the engine housing as the cam cover.\u003c\/div\u003e\n\n\u003cdiv\u003e The position of this drill bushing is held 0.0002\" from the engine case pins and 0.0002\" from the case centerline.\u003c\/div\u003e\n\n\u003cdiv\u003e Now, instead of guiding only from the left side with Timken bearings, which are floating fit, the JIMS lapper uses a specially ground bearing sleeve to hold the left side of the lapping shaft stationary.\u003c\/div\u003e\n\n\u003cdiv\u003e Both ends of the lapping machine rest precisely on the same centerline as the flywheel assembly. Thanks to this extremely rigid configuration, the lapping machine can be driven with a low-speed drill motor without fear of vibrations in the lapped bearing race.\u003c\/div\u003e\n\n \u003cdiv\u003eThe JIMS lapping machine can also be operated with a conventional hand crank when desired.\u003c\/div\u003e\n\n\u003cdiv\u003e It is recommended to use JIMS 978341 (retaining ring removal and installation tool), especially on 90-99 model crankcases.\u003c\/div\u003e\n\n\u003cdiv\u003e Note: See 978412 for 1-3\/4\" OD replacement lapping head.\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e Fits: 58-99 Big Twin crankcases (except Twin Cam).\u003c\/div\u003e","brand":"Jims","offers":[{"title":"Default Title","offer_id":23049358540885,"sku":"MC978411","price":1530.21,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1606\/2595\/products\/978411k.jpg?v=1571317781","url":"https:\/\/california-motorcycles.com\/en\/products\/jims-crankcase-lap-tool-for-harley-davidson","provider":"California Motorcycles","version":"1.0","type":"link"}