This service is for 1997 - 2018 YZ 125 MOTORCYCLE CYLINDER Big bore .

Cylinder sleeve is installed then Overbored +2mm to 56 mm. Bore NOW 134cc. 

Use a 56 mm Wiseco Piston on this 134cc Cylinder

Send your 56mm piston, remove power valve & studs

Power Valves Must Be Modified/ Recessed 1 mm to prevent Piston Damage!

Head must be  Re-chamfer to work with the Big Bore piston set up to your octane requirements.

Crankshaft -No crank modification required.

Crankcase - No crankcase modification required.

 

We can Precision machined your powervalve to match big bore ports ( @ extra cost) 

This kit requires you to send us your cylinder, head.

 

 

YZ-134 Big Bore Jug ( 1997 - 2018)

$220.00Price
Deck Cylinder head
  • Note: Product images only reflect class of products. If in doubt ask before purchasing. Our cylinder sleeves are made from chrome-moly alloy. Our Ports are machined with close tolerance and shapes allowing easy of installation and greatly reduce the need for additional porting after installation.

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Thanks for visiting our site. We look forward to assist you with all of your motorcycle cylinder service request.

*We will be adding a full cnc service department in the near future.

 

Call or text us @ : 1-281-516-8917

Email : info@accuratecylinderandsleeveworks.com

Shipping Address:

Accurate Cylinder & Sleeve Works

24230 Kuykendahl Rd

Ste 310 #148, Tomball TX 77375

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