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Product Description
Bore: Yes
Stroke: Yes
Actual Displacement = 166.82cc
Engine Modifications Required:
Cylinder: Bore, Port and Replate with Apticote 2000 ceramic bore coating.
Power Valves: Machined to match big bore ports.
Head: Rechamber to work with the Big Bore piston and stroker crank. 100 octane suggested for most conditions.
Crankshaft: Stroked and balanced.
Crankcase: Modified to clear stroker crank.
Blueprint: Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet.
Notes: This kit requires you to send us your entire engine for modification with kick starter and shifter.
Notes: Prices listed are to install stroker kit parts in good condition engine. Should your engine need rebuild parts there will be additional charges. We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)
Notes: This is it, the one and only YZ167. It is our most popular kit for the YZ125 and it has been for many years. This kit is very popular with Vet racers of all levels and works well no matter how you ride it. It can be lugged like a 250 or screamed like a 125, it does both equally well. Put a flywheel weight on it and it is one of the best woods engines you will ever find. If you are looking for a budget bike build up the best years for this mod was 01-03 followed closely by 05-Current.
Stroke: Yes
Actual Displacement = 166.82cc
Engine Modifications Required:
Cylinder: Bore, Port and Replate with Apticote 2000 ceramic bore coating.
Power Valves: Machined to match big bore ports.
Head: Rechamber to work with the Big Bore piston and stroker crank. 100 octane suggested for most conditions.
Crankshaft: Stroked and balanced.
Crankcase: Modified to clear stroker crank.
Blueprint: Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet.
Notes: This kit requires you to send us your entire engine for modification with kick starter and shifter.
Notes: Prices listed are to install stroker kit parts in good condition engine. Should your engine need rebuild parts there will be additional charges. We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)
Notes: This is it, the one and only YZ167. It is our most popular kit for the YZ125 and it has been for many years. This kit is very popular with Vet racers of all levels and works well no matter how you ride it. It can be lugged like a 250 or screamed like a 125, it does both equally well. Put a flywheel weight on it and it is one of the best woods engines you will ever find. If you are looking for a budget bike build up the best years for this mod was 01-03 followed closely by 05-Current.