SKU: 25944579735

TB Race Head 88cc Big Bore kit and 20mm Carburetor Performance Kit

Sale price$189.00 Regular price$210.00
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 10 - Sep 15

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Description

TB Race Head 88cc Big Bore kit and 20mm Carburetor Performance KitTB Race Head, 88cc Bore & 20mm Carb Kit Z50R, XR50, XR70 and Other Models This complete 88cc Race Head Kit will really wake up your stock engine and is comparable in power to the much larger Chinese 124cc engines!!! They are extremely reliable as well! This kit works on the following models: 88 thru present Z50R, XR50, and CRF50 All XR70 and CRF70 (Note: For the 88 91 Z50R, the newer style 2 bolt cam sprocket will be needed. We have them available in

TB Race Head, 88cc Bore & 20mm Carb Kit – Z50R, XR50, XR70 and Other Models

This complete 88cc Race Head Kit will really wake up your stock engine and is comparable in power to the much larger Chinese 124cc engines!!! They are extremely reliable as well! This kit works on the following models:

  • 88 thru present Z50R, XR50, and CRF50
  • All XR70 and CRF70

(Note: For the 88-91 Z50R, the newer style 2 bolt cam sprocket will be needed. We have them available in this section and the part number is TBW0861)

UPDATE – Until further notice, this kit will also include the following items at no extra charge!!!

  • 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)
  • 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 with larger 25/22mm stainless steel (21-4N material) valves for better flow and increased performance. Also has bigger cooling fins. Includes all necessary parts and comes assembled!
  • 20mm Performance carb assembly. Includes: 20mm carb, port matched intake, heatstop, gaskets, mounting hardware/wrench, long adjustable throttle cable, and an angled dual layer foam air filter.

Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25944579735

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4.3 ★★★★★
Based on 28 reviews
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C
Verified Purchase
Carl L. Bradley
Waukegan, US
★★★★★ 1
Kinda flimsy…
Thought the assembly was metal, it’s some kind of PVC.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
M
Verified Purchase
Michelle bullard
Carnegie, US
★★★★★ 5
Stable and easy to assemble
I used these to support a heavy piece of countertop would to create a side table. Looks great and holds steady.
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Reviewed in the United States on February 15, 2023
C
Verified Purchase
Charles Clerici
Draper, US
★★★★★ 5
Great
All pieces cut to perfection, went together perfectly
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 22, 2023
J
Verified Purchase
judith stevens
Port Orchard, US
★★★★★ 1
Some of the components are plastic
This is not a heavy duty application what so ever . One of the flanges broke . We do not recommend this product
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Reviewed in the United States on July 5, 2024
K
Verified Purchase
Kimberly matthews
Phoenix, US
★★★★★ 2
Quality control lacking
One tee conector was missing. Nothing avaliable locally that fits.
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Reviewed in the United States on July 13, 2025

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