Yamaha YFZ450
Advanced Machining Services Yamaha YFZ450 performance page. A vast array of OEM and aftermarket parts for your YFZ450. Head kits, Cylinder kits, Engine kits, seats and guides replaced, cams, valves and spring kits, multi angle valve jobs, oversized valves installed, porting, big bore head mods., cylinder boring/honing, big bore kits. Advanced Machining Services, Yamaha YFZ450 engine rebuilds, crank replacement, transmission repair. Box it up and ship it.

Advanced Machining Services LLC, 23 years engine building.
Yamaha YFZ450 cylinder kits
YFZ450 cylinder kit
  • Hone cylinder
  • Wiseco Piston kit
  • JE & CP available
  • 13:1 compression
  • gasket surfaces prepped
$249.00
CYLINDER NOT INCLUDED
YFZ450 450 cylinder kit
  • Nikasil cylinder
  • Wiseco Piston kit
  • JE & CP available
  • Top end gasket set
  • gasket surfaces prepped

True 450cc 450 class legal +1mm 96mm bore
$449.00
CYLINDER NOT INCLUDED
YFZ450 Big Bore cylinder kit
  • Bore & Nikasil cylinder
  • Wiseco Piston kit
  • JE & CP available
  • Top end gasket set
  • gasket surfaces prepped
+1mm 460cc $509.00
CYLINDER NOT INCLUDED

Yamaha YFZ450 motor jobs

Don’t want to dig into the motor, no problem, box it up and ship it.

We’ll do the top end (head & cylinder)

cam timing, install new piston kit

add $189.00

To split the case (crank & transmission work) includes top end,

add $415.00
YFZ450 Head Kits
YFZ450 stock head kit
  • Multi-angle valve job
  • 5 stock replacement OEM valves
  • new valve springs
  • valve guides checked
  • new valve stem seals
  • gasket surfaces prepped
$719.00
HEAD NOT INCLUDED

YFZ450 Hi-performance head kit Stage I

  • Stage I porting
  • Hotcams intake and exhaust
  • 5 Kibblewhite valves
  • Kibblewhite valve spring kit with titanium retainers
  • Multi-angle valve job
  • valve guides checked
  • new valve stem seals
  • gasket surfaces prepped
$1129.00
HEAD NOT INCLUDED

YFZ450 Hi-performance head kit Stage II

  • Stage II porting
  • Hotcams intake and exhaust
  • Combustion Chamber mod.
  • 5 Kibblewhite valves
  • Kibblewhite valve spring kit with titanium retainers
  • Multi-angle valve job
  • valve guides checked
  • new valve stem seals
  • gasket surfaces prepped
$1259.00
HEAD NOT INCLUDED
Yamaha YFZ450 Top End kits

YFZ450 stock head kit

  • Multi-angle valve job
  • 5 stock replacement OEM valves
  • top end gasket set
  • new valve springs
  • valve guides checked
  • new valve stem seals
YFZ450 cylinder kit
  • Hone cylinder
  • Wiseco Piston kit
  • JE & CP available
  • Top end gasket set
  • 13:1 compression
  • gasket surfaces prepped
$939.00
CYLINDER & HEAD NOT INCLUDED

YFZ450 Hi-performance top end kit Stage I

  • Wiseco Piston kit
  • JE & CP available
  • Hone cylinder
  • 13:1 compression
  • Stage I porting
  • Hotcams intake and exhaust
  • 5 Kibblewhite valves
  • Kibblewhite valve spring kit with titanium retainers
  • Top end gasket set
  • Multi-angle valve job
  • valve guides checked
  • new valve stem seals
  • gasket surfaces prepped
$1349.00
CYLINDER & HEAD NOT INCLUDED

YFZ450 Hi-performance top end kit Stage II

  • Wiseco Piston kit
  • JE & CP available
  • Hone cylinder
  • Stage II porting
  • Combustion Chamber mod.
  • Hotcams intake and exhaust
  • 5 Kibblewhite valves
  • Kibblewhite valve spring kit with titanium retainers
  • Top end gasket set
  • Multi-angle valve job
  • valve guides checked
  • new valve stem seals
  • gasket surfaces prepped
$1479.00
CYLINDER & HEAD NOT INCLUDED

YFZ450 motor jobs

Don’t want to dig into the motor, no problem, box it up and ship it.

We’ll do the top end (head & cylinder)

cam timing, install new piston kit

add $189.00

To split the case (crank & transmission work) includes top end,

add $415.00
Listed above is a selection of our more popular kits. You may have some of these parts, or, have some of this work done. We can custom tailor a kit to your specific needs. Give us a call for an estimate, and, Thanks for stopping by…hope to hear from you soon.

Advanced Machining Services LLC

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570-339-5898

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