https://completepartskit.com Wed, 29 Apr 2026 17:42:08 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 https://completepartskit.com/yfz450-yfz-450-cylinder-stock-bore-complete-top-end-rebuild-upgrade-parts-kit/ https://completepartskit.com/yfz450-yfz-450-cylinder-stock-bore-complete-top-end-rebuild-upgrade-parts-kit/#comments Fri, 08 Aug 2025 06:41:40 +0000 https://completepartskit.com/yfz450-yfz-450-cylinder-stock-bore-complete-top-end-rebuild-upgrade-parts-kit/





FITS ALL YAMAHA YFZ450 CARB MODELS AND YEARS. New after market 95mm cylinder. Wiseco CP or JE forged piston. Top end gasket kit. This is a bolt on kit that requires no machining of any kind. Runs on race gas. Our kits come standard with CP-Carrillo, JE, Wiseco, Wossner Pistons, Hotrods or Wiseco crankshafts, Hotcams or Webcams, Cometic, Vertex, Athena, or Winderosa gaskets and seals, and we have many of our own parts we have manufactured specifically for us. We always stock the exact same parts from different manufacturers so that when back orders occur like they have been for the last year we have an alternate part to send that is the same quality. This would be the ONLY reason your order might be slightly different when it arrives. All parts we sell have been tested and we have had huge success with them for the last 20 years. If we ever have a part that does not function well it is immediately discontinued and we stand behind everything we sell 100% (unless otherwise stated in the listing). That way we can fix it for your ASAP. 99% of problems can be easily solved without returning the entire order. Once items have been installed or used in any way they are not eligible for return. This product is NOT DIY. Over 99% of people in the world are not qualified to build an engine. It has to be done 100% correct, and many parts must be measured down to the. The correct knowledge and tools are required to do this. We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. 99% of failures from kits that have pistons is because the ring gap was not properly set. It is the responsibility of the person assembling the parts to make sure this is done correctly. Also, we want information from customers when their experience is less than desirable so we know what areas need improvement the most. Please work with us and we will ALWAYS work with you.

]]> https://completepartskit.com/yfz450-yfz-450-cylinder-stock-bore-complete-top-end-rebuild-upgrade-parts-kit/feed/ 0 https://completepartskit.com/yfz450-yfz-450-rebuild-kit-with-cases-crankcases-complete-assembly-repair-parts/ https://completepartskit.com/yfz450-yfz-450-rebuild-kit-with-cases-crankcases-complete-assembly-repair-parts/#comments Fri, 10 Nov 2023 00:08:21 +0000 https://completepartskit.com/yfz450-yfz-450-rebuild-kit-with-cases-crankcases-complete-assembly-repair-parts/










YFZ450 YFZ 450 Cases Crankcases Complete Rebuilt Motor Engine Rebuild Parts Kit. FITS ALL YAMAHA YFZ450 CARB MODELS AND YEARS! Compatible with all Yamaha YFZ 450 CARB models. Complete top and bottom-end gasket kit.

]]> https://completepartskit.com/yfz450-yfz-450-rebuild-kit-with-cases-crankcases-complete-assembly-repair-parts/feed/ 0 https://completepartskit.com/yfz450-yfz-450-cases-crankcases-complete-rebuilt-motor-engine-rebuild-parts-kit/ https://completepartskit.com/yfz450-yfz-450-cases-crankcases-complete-rebuilt-motor-engine-rebuild-parts-kit/#comments Tue, 18 Jul 2023 10:28:53 +0000 https://completepartskit.com/yfz450-yfz-450-cases-crankcases-complete-rebuilt-motor-engine-rebuild-parts-kit/












FITS ALL YAMAHA YFZ450 CARB MODELS AND YEARS! BRAND NEW OEM crankcases. Cylinder Works or Athena 95mm cylinder. CP JE or Wiseco forged piston. Hi temp piston rings. Hotrods or Wiseco crank with rod. HD head stud kit. Complete top and bottom end gasket kit. Complete crankcase oil seal kit. At bpracingatv our kits come with the same brand name parts (in many cases they are better) as other rebuild kits you see online but we always include items no one else does to make sure you get as complete of an order as possible. We want you to spend as little time having so search for parts as possible. We stock the exact same parts from different companies so that when back orders occur we have an alternate part to send that is the same quality. This would be the ONLY reason your order might be slightly different when it arrives. We have bulk pricing available for every item we sell. Just let us know how many you need! Please check your order completely right when you receive it and let us know immediately if there is an issue. This way we can fix it for your ASAP. Parts that do not meet these requirements are not refundable. We stand behind all parts we sell 100%. We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic.

]]> https://completepartskit.com/yfz450-yfz-450-cases-crankcases-complete-rebuilt-motor-engine-rebuild-parts-kit/feed/ 0 https://completepartskit.com/yfz450-yfz-450-valves-springs-guides-buckets-complete-head-rebuild-parts-kit/ https://completepartskit.com/yfz450-yfz-450-valves-springs-guides-buckets-complete-head-rebuild-parts-kit/#comments Tue, 29 Nov 2022 01:43:28 +0000 https://completepartskit.com/yfz450-yfz-450-valves-springs-guides-buckets-complete-head-rebuild-parts-kit/


FITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! Standard size steel valves. These valves and springs are NOT what you would need to use big cams that require heavy duty parts. They will work fine with Hotcams or OEM cams. We recommend that this be installed by a qualified mechanic with experience doing this type of work. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Engine Parts\Other Engine Parts”. The seller is “bpratv” and is located in this country: US. This item can be shipped worldwide.

• Modified Item: Yes
• Custom Bundle: Yes
• Manufacturer Part Number: 5ta-12112-00-00 5ta-12121-00-00 80-80206 3FV-12153
• Placement on Vehicle: Left, Right, Upper, Lower
• Brand: BP Racing ATV Yamaha
• Non-Domestic Product: Yes
• Warranty: Yes

]]> https://completepartskit.com/yfz450-yfz-450-valves-springs-guides-buckets-complete-head-rebuild-parts-kit/feed/ 0 https://completepartskit.com/yfz450-yfz-450-stock-complete-rebuilt-motor-engine-rebuild-assembly-parts-kit/ https://completepartskit.com/yfz450-yfz-450-stock-complete-rebuilt-motor-engine-rebuild-assembly-parts-kit/#comments Wed, 16 Nov 2022 10:44:37 +0000 https://completepartskit.com/yfz450-yfz-450-stock-complete-rebuilt-motor-engine-rebuild-assembly-parts-kit/






FITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! Wiseco CP or JE forged piston. Nitrite coated piston rings. Hotrods or Wiseco crankshaft with rod assembled. Water pump bearing and shaft. Oil pump inner and outer rotors. Complete gasket kit – top and bottom with head, base, exhaust, crankcase covers. Complete crankcase oil seal kit. Everything is new in the original packaging. PRICES AND LISTINGS ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE. DO YOU MAKE A LIVING WORKING ON BIKES? ARE YOU A SHOP OR DEALER. PRICES ARE SUBJECT TO CHANGE AND LISTINGS MAY BE REVISED AT ANY TIME WITHOUT NOTICE. All are the same quality. At BPRATV we sell parts from the best names in the industry. Unless otherwise stated, we will put the quality of the parts we sell up against any other companies’ in the industry. Also, we stock the same parts from different manufacturers so that when back orders occur like they have been for the last year we have an alternate part to send that is the same quality. This would be the ONLY reason your order might be slightly different when it arrives. If you want a certain brand part just ask (if part is back ordered this may cause a delay on your order). 99% of problems can be easily solved without returning the entire order. Once items have been modified, installed, or used in any way they are not eligible for return. This product is NOT DIY. Over 99% of people in the world are not qualified to build an engine. It requires special tools and has to be done 100% correct. Many parts must be measured down to. We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. It is the responsibility of the person assembling and tuning the parts to make sure they work correctly. If it can not be fixed we will supply you with a new one. It must be sent to us for inspection, and Millennium Technologies will determine if the cylinder is repairable. Also, we want information from customers when their experience is less than desirable so we know what areas need improvement the most. Please work with us and we will ALWAYS work with you. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Engine Parts\Other Engine Parts”. The seller is “bpratv” and is located in this country: US. This item can be shipped worldwide.

• Modified Item: Yes
• Country/Region of Manufacture: United States
• Custom Bundle: Yes
• Surface Finish: Forged
• Manufacturer Part Number: 5TG-11400-31 5TG-11631-12 5TA-11311-12
• Modification Description: buy best yfz450 engine motor top bottom end online
• Placement on Vehicle: Left, Right, Upper, Lower
• Brand: JE CP Carrillo Hotrods Yamaha Wiseco Vertex BPRATV
• Non-Domestic Product: No
• Warranty: Yes
• Bundle Description: get best yfz450 rebuild complete engine for sale

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FITS ALL YAMAHA YFZ450 CARB MODEL YEARS AND MODELS! DOES NOT FIT YFZ450R FI MODEL. NEW BP Racing big bore 98mm cylinder. Wiseco JE or CP forged piston. Hi temp piston rings. Hotrods or Wiseco crank with rod. Water pump bearing and shaft. 98mm big bore MLS head gasket. Complete crankcase oil seal kit. This is a bolt on kit with no machining required. Piston uses pump or race gas. At bpracingatv our kits come with the same brand name parts (in many cases they are better) as other rebuild kits you see online but we always include items no one else does. We stock the exact same parts from different companies so that when back orders occur we have an alternate part to send that is the same quality. This would be the ONLY reason your order might be slightly different when it arrives. We have bulk pricing available for every item we sell. Just let us know how many you need! Please check your order completely right when you receive it and let us know immediately if there is an issue, that way we can fix it for your ASAP. Parts that do not meet these requirements are not refundable. We stand behind all parts we sell 100%. We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. Also, we appreciate your feedback to help us improve how we do business. Please work with us and we will ALWAYS work with you. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Engine Parts\Other Engine Parts”. The seller is “bpratv” and is located in this country: US. This item can be shipped worldwide.

• Modified Item: Yes
• Custom Bundle: Yes
• Surface Finish: Forged
• Manufacturer Part Number: 4073 P400485100016 WPK0027 4906M09800 23001-k01
• Modification Description: best kit parts to rebuild yfz 450 complete motor engine bottom end
• Placement on Vehicle: Rear, Upper, Lower
• Brand: Wiseco Hotrods Hot Rods BP Racing ATV Cylinder
• Non-Domestic Product: No
• Warranty: Yes
• Bundle Description: buy yfz450 complete rebuilt assembled motor engine for sale

]]> https://completepartskit.com/yfz450-yfz-450-98mm-big-bore-complete-rebuilt-motor-engine-rebuild-parts-kit-480/feed/ 0 https://completepartskit.com/yfz450-yfz-450-big-bore-98-mil-cylinder-top-end-rebuild-478-complete-parts-kit/ https://completepartskit.com/yfz450-yfz-450-big-bore-98-mil-cylinder-top-end-rebuild-478-complete-parts-kit/#comments Sun, 11 Sep 2022 14:11:49 +0000 https://completepartskit.com/yfz450-yfz-450-big-bore-98-mil-cylinder-top-end-rebuild-478-complete-parts-kit/









FITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! 98mm REDESIGNED big bore cylinder. CP JE or Wiseco forged piston. Hi temp piston rings. Top end gasket kit. This is a bolt on kit with no machining required. Piston uses pump or race gas. COVID IS STILL CAUSING BACK ORDERS DAILY. WE STOCK THE EXACT SAME PARTS FROM DIFFERENT MANUFACTURERS SO THAT WHEN, NOT IF, BACK ORDERS HAPPEN WE HAVE AN ALTERNATE PART THAT IS THE SAME QUALITY TO SEND YOU. IF YOU ONLY WANT A CERTAIN BRAND PISTON OR CRANK JUST ASK! Please do not take our word for it. Contact any company that makes a part we tell you is back ordered and confirm for yourself. If you need contact info feel free to ask us. The parts we sell ARE NOT DIY. We always strongly recommend that this be installed by a qualified mechanic with experience working on these types of engines. Piston comes with specific instructions for setting the ring gap. If you do not follow these exactly your motor will fail. We stand behind every product we sell but with parts like we sell the person installing them takes a very large percentage of the responsibility for making sure they run right. Also, PLEASE PLEASE make sure you set the ring gap on your piston. If you do not do this your motor will fail. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components”. The seller is “bpratv” and is located in this country: US. This item can be shipped worldwide.

• Modified Item: Yes
• Custom Bundle: Yes
• Surface Finish: Forged
• Manufacturer Part Number: 23001-k01 5ta-11311 94591-57118-00 5TG-11631-12
• Modification Description: 98 mil big bore
• Placement on Vehicle: Left, Right, Upper
• Brand: CP JE Wiseco Athena Yamaha Cometic BP Racing ATV
• Warranty: Yes
• Bundle Description: big bore cylinder

]]> https://completepartskit.com/yfz450-yfz-450-big-bore-98-mil-cylinder-top-end-rebuild-478-complete-parts-kit/feed/ 0 https://completepartskit.com/yfz450-yfz-valves-kibblewhite-valve-springs-kpmi-complete-head-rebuild-parts-kit/ https://completepartskit.com/yfz450-yfz-valves-kibblewhite-valve-springs-kpmi-complete-head-rebuild-parts-kit/#comments Sun, 17 Apr 2022 09:15:14 +0000 https://completepartskit.com/yfz450-yfz-valves-kibblewhite-valve-springs-kpmi-complete-head-rebuild-parts-kit/








FITS ALL YAMAHA YFZ450 AND YFZ450R CARB AND FI MODELS AND YEARS. Kibblewhite chrome silicone valve springs. Kibblewhite heat treated collars. Kibblewhite White Diamond stainless steel valves. Kibblewhite bronze valve guides. Kibblewhite viton valve stem seals. This is a bolt on kit with no machining required. Piston uses pump or race gas. At bpracingatv our kits come with the same brand name parts (in many cases they ar better) as other rebuild kits you see online but we always include items no one else does. We stock the exact same parts from different companies so that when back orders occur we have an alternate part to send that is the same quality. This would be the ONLY reason your order might be slightly different when it arrives. We have bulk pricing available for every item we sell. Just let us know how many you need! Please check your order completely right when you receive it and let us know immediately if there is an issue. This way we can fix it for your ASAP. Parts that do not meet these requirements are not refundable. We stand behind all parts we sell 100%. We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components”. The seller is “bpratv” and is located in this country: US. This item can be shipped worldwide.

• Modified Item: Yes
• Custom Bundle: Yes
• Surface Finish: Forged
• Manufacturer Part Number: 80-80206 80-80213H 80-80215H 80-80217H 5ta-12111-0
• Modification Description: best replacement valves yfz450 yfz 450
• Placement on Vehicle: Left, Right, Upper, Lower
• Brand: Kibblewhite KPMI White Diamond Yamaha
• Non-Domestic Product: No
• Warranty: Yes
• Bundle Description: buy yfz450 kibblewhite valves springs for sale

]]> https://completepartskit.com/yfz450-yfz-valves-kibblewhite-valve-springs-kpmi-complete-head-rebuild-parts-kit/feed/ 0 https://completepartskit.com/yfz450-yfz-450-big-bore-stroker-motor-complete-500-engine-rebuild-parts-kit-98mm/ https://completepartskit.com/yfz450-yfz-450-big-bore-stroker-motor-complete-500-engine-rebuild-parts-kit-98mm/#comments Sat, 07 Aug 2021 11:38:48 +0000 http://completepartskit.com/yfz450-yfz-450-big-bore-stroker-motor-complete-500-engine-rebuild-parts-kit-98mm/












FITS ALL YAMAHA YFZ450 CARB MODEL YEARS AND MODELS! Wiseco or CP forged piston. Hi temp piston rings. Hotrods +3mm stroker crank with rod. If you want a specific brand just ask This is a bolt on kit with no machining required. Piston uses pump or race gas. Everything is new in the original packaging. If you have ANY issue with something you order from us PLEASE let us fix the problem before you leave feedback. We 100% guarantee we will find a reasonable solution to any problem. We want happy customers always. We ALWAYS STRONGLY recommend that this be installed by a qualified mechanic with experience doing this type of work. Piston comes with specific instructions for setting ring gap. If you do not follow these your motor will fail. The item “YFZ450 YFZ 450 Big Bore Stroker Motor Complete 500 Engine Rebuild Parts Kit 98mm” is in sale since Thursday, July 1, 2021. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components”. The seller is “bpracingatv” and is located in Upland, California. This item can be shipped worldwide.

• Modified Item: Yes
• Custom Bundle: Yes
• Surface Finish: Forged
• Manufacturer Part Number: 5TG-11400-31-00 5TA-11311-12-00 23001-k01
• Placement on Vehicle: Left
• Brand: Wiseco Hotrods Hot Rods BP Racing ATV Yamaha
• Warranty: Yes

]]> https://completepartskit.com/yfz450-yfz-450-big-bore-stroker-motor-complete-500-engine-rebuild-parts-kit-98mm/feed/ 0 https://completepartskit.com/yfz450-yfz-450-motor-engine-parts-complete-top-bottom-end-rebuild-kit-w-clutch/ https://completepartskit.com/yfz450-yfz-450-motor-engine-parts-complete-top-bottom-end-rebuild-kit-w-clutch/#comments Tue, 03 Dec 2019 10:59:12 +0000 http://completepartskit.com/yfz450-yfz-450-motor-engine-parts-complete-top-bottom-end-rebuild-kit-w-clutch/


AT BP RACING ATV WE DO NOT JUST SELL PARTS. WE TEST TUNE REPAIR AND REBUILD EVERY ATV, UTV, SIDE x SIDE, AND DIRT BIKE PRODUCED. FITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! REBUILD YOUR MOTOR RIGHT! 12.5:1 JE or CP piston kit. Clutch kit (fibers, steels, springs). Heavy duty main bearings. Water pump rebuild kit. No modification of any kind is required to use this kit. Piston uses pump or race gas. We recommend that this be installed by a qualified mechanic with experience doing this type of work. The item “YFZ450 YFZ 450 Motor Engine Parts Complete Top Bottom End Rebuild Kit w Clutch” is in sale since Saturday, February 23, 2019. This item is in the category “eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components”. The seller is “bpracingatv” and is located in Upland, California. This item can be shipped worldwide.

• Manufacturer Part Number: 247957 4073 20001-k01 K022 5ta-11311-00-00
• Brand: JE BP Racing ATV Hotrods Yamaha
• Warranty: Yes
• Country/Region of Manufacture: United States

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