This Item no longer available

Below you will find information about an item(s) that BBR no longer manufactures or sells. This information is provided for current owners of these items and for historical purposes. We do not have any more of this item(s) (new, used, scratch-n-dent, or otherwise). We do NOT maintain lists of customers that have these items for sale or that wish to purchase them. All items that BBR currently sells are listed on our Product pages.

Unfortunately, we cannot produce "one-offs" of any of these discontinued items. They were discontinued when we determined that they were no longer profitable to manufacture. Generally, making a single item costs about 10 times the old retail price - or we lose money on it - so we rarely do it. The past 20 years of building playbike performance products has taught us that we need to sell a quantity of about 100, a year, of any particular item for it to break even. So, if you can find 100 people to pay us up front, we'll consider making just about anything. It's that simple.

If you're looking for an item that isn't listed here or on our current Product pages, we also have a more historical section of our website. Check out our detailed BBR Product ID page for lots of photos and general information about BBR products of the past.
Bore Kit - 88cc Super Pro, Red/Black / XR/CRF 50/70
Bore Kit - 88cc Super Pro, Red/Black / XR/CRF 50/70 
411-HXR-5206
411-HXR-5206
410-HXR-5005
410-HXR-5005
411-HXR-5210
411-HXR-5210
411-HXR-5211
411-HXR-5211
411-HXR-5212
411-HXR-5212
411-HXR-5250
411-HXR-5250
411-HXR-5255
411-HXR-5255
411-HXR-5262
411-HXR-5262
411-HXR-5265
411-HXR-5265
421-BBR-2001
421-BBR-2001
512-BBR-1001
512-BBR-1001
512-BBR-2001
512-BBR-2001


The ultimate 88cc big bore kit with BBR custom aluminum cylinder, big valve/big port cylinder head and camshaft. Cylinder retains skidplate mounts, and comes with everything you need to assemble. 
  
   • BBR big valve/big port cylinder head
• BBR billet cam cover (black)
• 52mm 11:1 piston, rings, pin & clips
• 18mm carb kit with throttle and cable
• Assortment of main and pilot jets
• performance manifold and air filter
• BBR aluminum cylinder
• BBR HD clutch springs
• Exclusive MX grind camshaft
• High-volume oil pump
• Complete top end gasket set
• Detailed instructions
 
   
 
BBR General Jetting Guidelines Chart
 
 Installation Instructions:  411-HXR-5206.pdf 

Part NumberApplicationPrice 
411-HXR-5206Bore Kit - 88cc Super Pro / XR/CRF 50/70 $649.95
Discontinued
411-HXR-5260Intake Valve Kit - 88cc Super Pro Bore Kit, 25mm / XR/CRF50$39.95
Discontinued
411-HXR-5261Exhaust Valve Kit - 88cc Super Pro Bore Kit, 22mm / XR/CRF50$59.95
Discontinued
Replacement Parts:
410-HXR-5005Clutch Springs - HD / XR/CRF50, 00-Present$26.95
Discontinued
411-HXR-5210Gasket Kit - 88cc S/P-FTP Kit / XR/CRF50/70$19.95
Discontinued
411-HXR-5211Piston Kit - 88cc S/P Kit / XR/CRF50/70$98.00
Discontinued
411-HXR-5212Ring Set - 88cc/106cc S/P-FTP Kit / XR/CRF50/70$32.00
Discontinued
411-HXR-5215Piston - 88cc S/P Kit / XR/CRF50/70$72.00
Discontinued
411-HXR-5216Piston Pin - 88cc/106cc S/P-FTP Kit / XR/CRF50/70$16.00
Discontinued
411-HXR-5217Piston Pin Clips (2) - 88cc/106cc S/P-FTP Kit / XR/CRF50/70$3.00
Discontinued
411-HXR-5250Cylinder - BBR Aluminum, 52mm / XR/CRF50$155.00
Discontinued
411-HXR-5251Cylinder Head Assembly - BBR Big Valve/Port / XR/CRF50$300.00
Discontinued
411-HXR-5252Camshaft - BBR Super Pro 88/106cc Bore Kit / XR/CRF50$129.95
Discontinued
411-HXR-5255Oil Pump - BBR High Flow W/Gasket / XR/CRF50$49.95
Discontinued
411-HXR-5262Rocker Arm/Shaft Kit - 88cc Super Pro Bore Kit / XR/CRF50$32.95
Discontinued
411-HXR-5265Valve Set - Intake (25mm) / Exhaust (22mm) SuperPro Bore Kit / XR/CRF50$65.00
Discontinued
421-BBR-2001Carburetor Only - 18mm (80m/35p)$95.00
Discontinued
422-HXR-5002Intake Manifold - XR/CRF50-70/PC18/Big Valve Head$42.95
Discontinued
512-BBR-1001Throttle Cable - BBR 18mm/26mm Carb Kit / XR/CRF50 / KLX/DRZ110 / Bar Kit - CRF110F / DRZ70$24.00
Discontinued
512-BBR-2001Throttle Assembly - BBR Carb Kits / Brake Kits$22.95
Discontinued
Optional Parts:
385-HXR-5015Sprocket - Front, 15T / XR/CRF50, 00-Present$16.95
Discontinued
411-HXR-5360Stroke Up Kit - 88cc-106cc SuperPro, (BBR S/P Only) / XR/CRF50$299.95
Discontinued
430-HXR-5002Air Filter - UNI, 1 1/4"(32mm) X 4", Straight / 18mm Carb / XR/CRF70 Stock Carb$18.95
Discontinued
451-HXR-5001Rev Box - Honda / XR/CRF50/70/80/100$69.95
Discontinued