Skip to content
Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.
Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.
99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve
99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve
99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve
99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve
99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve
99+ YZ250 YZ 250 Big Bore Kit 72mm Ported Cylinder Machined Head Powervalve

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

by BPRATV
Save 7% Save 7%
$1,719.99
$1,719.99 - $1,719.99
$1,719.99
$1,599.99
$1,599.99 - $1,599.99
$1,599.99
FITS ALL 1999 AND NEWER YAMAHA YZ250 TWO STROKE MODELS - READY TO BOLT ON AND GO!
  • 72mm ported big bore cylinder
  • Wiseco or Wossner 72mm forged piston**
  • Piston rings
  • Wristpin
  • Circlips
  • Wristpin bearing
  • Cylinder Works cylinder head machined for 72mm big bore
  • Big bore power valve assembly matched to cylinder
  • Head stud kit
  • Maxlock cylinder to crankcase stud kit
  • NGK spark plug
  • Stickers
  • No mods required

TOP SELLERS

Save 20% Save %
$374.98
$374.98 - $374.98
$374.98
$299.98
$299.98 - $299.98
$299.98

Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts

BPRATV

1043-2, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13...

View full details
$374.98
$374.98 - $374.98
$374.98
$299.98
$299.98 - $299.98
$299.98
Save 20% Save %
Save 13% Save %
$149.99
$149.99 - $149.99
$149.99
$129.99
$129.99 - $129.99
$129.99

400EX 400X Head Redo Valves Intake Exhaust Valve Springs Rocker Arms Rebuild Kit

BPRATV

30-3111,30-3115,30-3117,14711-KCY-670,14721-KCY-670 8400003-2, 8400003-1,VES003, VIS003,X2VEK16000,X2VIK16000 28.1495-2, 28.1495-1,14711-KCY-670, 1...

View full details
$149.99
$149.99 - $149.99
$149.99
$129.99
$129.99 - $129.99
$129.99
Save 13% Save %
Save 24% Save %
$41.99
$41.99 - $41.99
$41.99
$31.99
$31.99 - $31.99
$31.99

Honda 400EX 400X XR400R Exhaust Studs Titanium Head Pipe Stud Upgrade Kit Set

BPRATV Talon Titanium

FITS ALL HONDA TRX400EX XR400R AND 400X MODELS AND YEARS Studs for all OEM and aftermarket exhaust systems All titanium stud and nut kit Made from ...

View full details
$41.99
$41.99 - $41.99
$41.99
$31.99
$31.99 - $31.99
$31.99
Save 24% Save %
Save 24% Save %
$461.99
$461.99 - $461.99
$461.99
$349.99
$349.99 - $349.99
$349.99

Honda TRX 400EX XR400R 87mm Big Bore Kit +2mm Cylinder 416cc Top End Rebuild Kit

BPRATV

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

View full details
$461.99
$461.99 - $461.99
$461.99
$349.99
$349.99 - $349.99
$349.99
Save 24% Save %
Sold out
$1,152.33
$1,152.33 - $1,152.33
$1,152.33
$692.98
$692.98 - $692.98
$692.98

Honda 400EX 400X 88mm +3 Big Bore Kit Stage 2 Cam 426cc Top End Rebuild 2 Hotcam

BPRATV

Works on all Honda 400EX, 400X, and XR400R models and years 88mm heavy-duty big bore cylinder 88mm big bore Wiseco or Wossner forged piston Nitrite...

View full details
$1,152.33
$1,152.33 - $1,152.33
$1,152.33
$692.98
$692.98 - $692.98
$692.98
Sold out
Shop collection

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare