Click on image to zoom

Trail Bikes 88cc Big Bore Kit, 20mm Carb Kit & Race Head - Z50 (1988-99),  XR50  CRF50  XR70  CRF70 (All)

Trail Bikes Race Head, 88cc Big Bore kit,
with 20mm Carburetor Performance Kit
Honda Z50, XR50, CRF50, XR70, CRF70; ALL YEARS -(12v Engines)

Pricing: $348.95

Customize Your Item

- What Throttle Cable Do You Need? -
 * required


Trail Bikes Race Head, 88cc Bore & 20mm Carb Kit for the Honda z/xr/crf50 and xr/crf70 - 12 Volt Motors

Includes the following:
      - Lightweight aluminum cylinder with steel sleeve
      - Cast in mounts on cylinder for aftermarket skid plates
      - Oversized cooling fins on cylinder for efficient heat dissipation
      - 52mm high compression piston with rings, pin, & clips
      - Head gasket kit and clutch cover gasket.
      - High performance race camshaft (for the Race Head only)
      - Race Head larger valves (25/22mm) and better flow for increased performance with large cooling fins.
      (Includes all necessary parts and comes assembled!)
      - The exhaust valve has been upgraded to stainless steel (21-4N material)
      - 20mm Performance Carb Assembly (Assembly includes: Carb, intake, heatstop, gaskets, mounting hardware/wrench, throttlecable with style
       choice and an angled, dual layer foam air filter.)

Kit ALSO comes complete with the additional pieces:
      - 6 Piece main jet kit for the 20mm carb ($10 savings)
      - High Volume oil pump ($25 savings)
      - Clutch cover gasket ($3 savings)
      - Performance CDI ($25 savings)

NEED JET KITS? This kit comes with only the main jet kit so at the bottom of the page has the two jets you'll need, Pilot Jet for 20mm and Main Jet for 20mm. Just add the jets to your cart.

Please Note: It will save a lot of time and effort if the oil pump is installed simultaneously (same time) as installation of the bore kit. (Requires cylinder removal).

Parts Included:



  • K0936TB
  • K0936TB
  • Trail Bikes
  • New

Shipping Information

  • Item Requires Shipping
  • 10.0 lbs.
  • W13.0000” x H13.0000” x L13.0000”

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

  • FAST ShippingWe ship out items quickly! International Shipping available
  • Safe & Secure Worry-free Online Shopping
  • Online e-tailerWe've been in business since 1999
  • Largest Mini Bike Parts SelectionBest Quality Made Parts Available