Port Cylinder Head

yz250
YZ250_Big_Bore_Kit_Ported_Cylinder_Head_Powervalve_Complete_Motor_Engine_Rebuild_01_lawi

YZ250 Big Bore Kit Ported Cylinder Head Powervalve Complete Motor Engine Rebuild

72mm big bore cylinder Stage 3 fully ported & polished. Wiseco or Wossner 72mm big bore forged performance piston. Nitrite coated piston rings. Big bore cylinder head. Powervalve machined for 72mm bore. Talon HD replacement crank with rod assembled. SKF HD crank bearings. TITANIUM cylinder stud kit with 12 point flange nuts. TITANIUM cylinder head stud kit with 12 point flange nuts. Compatible with all 2003+ Yamaha YZ250 and YZ250X two stroke models. Powervalve and cylinder head modification required for ALL 72mm big bore cylinders. 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…
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1988_Yz250_Ported_Cylinder_Top_End_Motor_Jug_Barrel_Piston_Rings_Head_01_jfh

1988 Yz250 Ported Cylinder Top End Motor Jug Barrel Piston Rings Head

Nice oem 88 yz 250 ported cylinder by DBP. ON 1st oversize piston. The bore looks great with some cross hatching still showing, included is the head, 2 power valve covers and piston, please look at photos closely. I also have the power valve. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle & Scooter Parts & Accessories\Body & Frame\Fairings, Plastics & Body Kits". The seller is "motoman143" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, Korea, South, Indonesia,…
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Cylinder_YZ250_Top_End_1978_Head_STANDARD_BORE_70_mm_BROKEN_FINS_Ported_Polished_01_tbb

Cylinder YZ250 Top End 1978 Head STANDARD BORE 70 mm BROKEN FINS Ported Polished

This is a 1978 YZ250E cylinder & head. It correctly fits & works on the 1978 & 1979 YZ250 & the 1979 IT250F. Picked this bike up in pieces. And some moron broke off two fins on this standard bore low hour cylinder with some really nice porting. I received the larger of the two broken off pieces with the cylinder. Can be welded back on. Makes me sick to see vintage parts damaged like this. A hammer with a piece of pine wood used in the intake & exhaust areas would have taken a minute or two longer to break the cylinder loose. All threads are good on the…
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03_YZ250_YZ_250_Ported_Cylinder_Porting_Head_Complete_Top_End_Rebuild_Parts_Kit_01_qjc

03+ YZ250 YZ 250 Ported Cylinder Porting Head Complete Top End Rebuild Parts Kit

FITS ALL 2003 AND NEWER YAMAHA YZ250 TWO STROKE DIRT BIKES. Aftermarket 66.40mm cylinder. Stage 2 trail/MX port. Wiseco or Wossner 66.40mm forged piston. Top end gasket kit. MAXLOCK head stud kit. Cylinder to case dowel pins. Head works with all OEM or after market components. Piston uses pump or race gas. Works with stock or after market valve springs. Everything is brand new. Please check your order thoroughly when receiving it. We recommend that this kit be installed by a qualified mechanic with experience working on these types of motors. Piston comes with specific instructions for setting the ring gap. If you do not follow these exactly your motor…
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Cylinder_YZ250_Top_End_1978_Head_STANDARD_BORE_70_mm_BROKEN_FINS_Ported_Polished_01_gr

Cylinder YZ250 Top End 1978 Head STANDARD BORE 70 mm BROKEN FINS Ported Polished

This is a 1978 YZ250E cylinder & head. It correctly fits & works on the 1978 & 1979 YZ250 & the 1979 IT250F. Picked this bike up in pieces. And some moron broke off two fins on this standard bore low hour cylinder with some really nice porting. I received the larger of the two broken off pieces with the cylinder. Can be welded back on. Makes me sick to see vintage parts damaged like this. A hammer with a piece of pine wood used in the intake & exhaust areas would have taken a minute or two longer to break the cylinder loose. All threads are good on the…
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99_YZ250_YZ_250_Big_Bore_Kit_72mm_Ported_Cylinder_Machined_Head_Powervalve_01_okb

99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve

FITS ALL 1999 AND NEWER YAMAHA YZ250 TWO STROKE MODELS. 72mm ported big bore cylinder. Wiseco or Wossner 72mm forged piston. Cylinder Works cylinder head machined for 72mm big bore. Big bore power valve assembly matched to cylinder. Maxlock cylinder to crankcase stud kit. Piston uses pump or race gas. At bpratv our kits come with parts from the best brands in the industry. What makes our kits different is they are always more complete than our competitors'. We want you to spend as little time having to search for parts as possible. We always stock the exact same parts from different companies so that when back orders occur we…
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YZ250_YZ_250_Big_Bore_Kit_72mm_Cylinder_Ported_Head_Valve_Complete_Rebuild_Kit_01_gy

YZ250 YZ 250 Big Bore Kit 72mm Cylinder Ported Head Valve Complete Rebuild Kit

FITS ALL 2003 AND NEWER YAMAHA YZ250 TWO STROKE DIRT BIKES. New 72mm big bore cylinder Stage 2 ported. Wiseco or Wossner forged 72mm piston. Cylinder Works cylinder head. Hotrods or Wiseco HD crank with rod. Big bore top end gaskets. Complete engine seal kit. MAXLOCK head stud kit. Piston uses pump or race gas. At bpracingatv our kits come with parts from the best brands in the industry. What makes our kits different is they are always more complete than our competitors'. We want you to spend as little time having to search for parts as possible. We always stock the exact same parts from different companies so that…
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Cylinder_YZ250_Top_End_1978_Head_STANDARD_BORE_70_mm_BROKEN_FINS_Ported_Polished_01_sk

Cylinder YZ250 Top End 1978 Head STANDARD BORE 70 mm BROKEN FINS Ported Polished

This is a 1978 YZ250E cylinder & head. It correctly fits & works on the 1978 & 1979 YZ250 & the 1979 IT250F. Picked this bike up in pieces. And some moron broke off two fins on this standard bore low hour cylinder with some really nice porting. Makes me sick to see vintage parts damaged like this. A hammer with a piece of pine wood used in the intake & exhaust areas would have taken a minute or two longer to break the cylinder loose. All threads are good on the studs as well as the intake bolt hole threads. No weld repairs on the cylinder. Cylinder wall has…
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