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HJC FG-17 Lorenzo Mamba Helmet
  • HJC FG-17 Lorenzo Mamba Helmet - Matte Black/Grey
  • HJC FG-17 Lorenzo Mamba Helmet - Matte Black/Green
  • HJC FG-17 Lorenzo Mamba Helmet - Matte Black/Green

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9344 17757

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Video Reviews (3)

HJC FG-17 Lorenzo Mamba Helmet Videos

HJC FG-17 Jorge Lorenzo Mamba Replica Helmet

The HJC FG 17 shares DNA from the RPHA side of the house while maintaining a more modest level of investment to the rider.

  • Advanced Fiberglass Composite Shell
    • Lightweight, superior fit and comfort using advanced CAD technology
    • Aerodynamic shell with large eyeport opening for greater visibility
  • ACS Advanced Channeling Ventilation System
    • Scoop top intake vent combines with rear exit vents to provide flow-through ventilation, helping to pull heat out of the helmet’s interior
    • Chin bar vent provides airflow across the shield interior to help eliminate shield fogging
  • Removable, Washable Interior
    • Removable, washable Silvercool antibacterial moisture-wicking comfort liner
  • Rapid Fire II Shield Replacement System
    • Quick, secure, tool-less shield removal and installation system
    • Aerodynamic, flush-mounted shield fit for reduced turbulence
  • Pinlock Prepared HJ-20M Shield
    • Anti-fog, scratch-resistant hard coating
    • Optically correct 3D design
    • 100% MaxVision Pinlock lens insert sold separately
  • Approximate Weight
    • 3.48 lbs / 1580 grams (approx, based on size medium solid color)
  • Safety Standards
    • DOT and SNELL M2010

HJC Helmet Sizing:

Wrap a cloth measuring tape around your head just above your eyebrows. Pull the tape comfortably snug, and read the length.

Size Hat Size Measurement (in)
2XS 6 3/8 - 6 1/2 20 - 20 1/2
XS 6 5/8 - 6 3/4 20 7/8 - 21 1/4
SM 6 7/8 - 7 21 5/8 - 22
MD 7 1/8 - 7 1/4 22 1/2 - 22 7/8
LG 7 3/8 - 7 1/2 23 1/4 - 23 5/8
XL 7 5/8 - 7 3/4 24 - 24 3/8
2XL 7 7/8 - 8 24 3/4 - 25 1/4
3XL 8 1/8 - 8 1/4 25 5/8 - 26
4XL 8 3/8 - 8 1/2 26 3/8 - 26 3/4
5XL 8 3/4 27 1/4 - 27 5/8

RPHA Series, FG-Jet, and FG-17 Helmet Sizing ONLY:

Size Hat Size Measurement (in)
XS 6 3/4 - 6 7/8 21 1/4 - 21 5/8
SM 6 7/8 - 7 21 5/8 - 22
MD 7 1/8 - 7 1/4 22 1/2 - 22 7/8
LG 7 1/4 - 7 3/8 22 7/8 - 23 1/4
XL 7 1/2 - 7 5/8 23 5/8 - 24
2XL 7 3/4 - 7 7/8 24 3/8 - 24 3/4
3XL 8 - 8 1/8 25 1/4 - 25 5/8

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full HJC Helmets Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Matte Black/Grey / XS 947835 0817-1435-03 In Stock: Ships within 24 hours
Matte Black/Grey / SM 947836 0817-1435-04 In Stock: Ships within 24 hours
Matte Black/Grey / MD 947837 0817-1435-05 In Stock: Ships within 24 hours
Matte Black/Grey / LG 947838 0817-1435-06 In Stock: Ships within 24 hours
Matte Black/Grey / XL 947839 0817-1435-07 In Stock: Ships within 24 hours
Matte Black/Grey / 2XL 947840 0817-1435-08 In Stock: Ships within 24 hours
Matte Black/Grey / 3XL 947841 0817-1435-09 Out of Stock
Matte Black/Green / XS 947828 0817-1434-03 In Stock: Ships within 24 hours
Matte Black/Green / SM 947829 0817-1434-04 In Stock: Ships within 24 hours
Matte Black/Green / MD 947830 0817-1434-05 In Stock: Ships within 24 hours
Matte Black/Green / LG 947831 0817-1434-06 In Stock: Ships within 24 hours
Matte Black/Green / XL 947832 0817-1434-07 In Stock: Ships within 24 hours
Matte Black/Green / 2XL 947833 0817-1434-08 In Stock: Ships within 24 hours
Matte Black/Green / 3XL 947834 0817-1434-09 Out of Stock


Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.


If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
HJC FG-17 Lorenzo Mamba Helmet 4.6 5 168 168
Great for the price It's my first helmet, so I can't really compare to anything other than what I tried on to compare the night I bought it (in the retail location here in Philly). I do know it was a great buy compared to others at this price point. November 9, 2015
This helmet is great I went from a cheap oversized helmet to the fg-17 and I couldn't be happier. It's a great helmet, very light weight and comfortable. Air flow is perfect when you want it and not there when you don't. The only thing that annoys me sometimes is that there is a decent amount of wind noise. Besides that I would definitely recommend this helmet! October 26, 2015
Good helmet, love the color Good helmet. Matte Black looks really good. Just need to keep it clean and scratch free. Brian at the Philly shop was unbelievably helpful in getting me sorted out for gear including this helmet. October 26, 2015
Awesome Helmet This helmet has been fantastic. I'm a daily rider in Boston and have used this for 3k miles. I have 2 other helmets but this blows them away- HJC 3/4 helmet and the Speed and Strength SS700 Dogs Of War. This is one of the safest helmets on the market and under $200. I find it truly comfortable and have done rides over 500 miles long straight through with no issues. The screen provides an excellent view. I bought a black smoke screen for summer riding and the helmet looks mean with that on, absolutely love it. The noise is pretty standard but I use foam plugs regardless of helmet which greatly enhances the ride. The foam is still in excellent condition and the helmet is yet to smell (I do use a bandana). The screen can fog in certain conditions as any helmet does but it is minimal and easily fixed by raising it slightly or putting in the pinlock lens insert. The matte black look is great, the helmet feels very secure/safe, and the features are solid. It is easy to change screens, the screen is easy to open up even with gloves, and the airflow is good. I certainly recommend this product to anyone, especially if you are on a budget but want the best in safety. October 20, 2015
Really good helmet Really nice helmet for the price..good fit and made out of good materials. October 19, 2015
great value, snell rated, anti-fog attachment works pretty well! I needed a helmet that I could wear with my wraparound Rx glasses. They're wraparounds, shouldn't be an issue, right? Well, after trying on numerous helmets (all my local shop had in the store, including modulars), it came down to an Arai which was just too much $$ for me. I read the reviews and even talked with a gear geek, and HJC sounded like the right one for me. I didn't even realize it was snell rated until a friend told me! Well, glasses go on like a charm, though I have to make sure they don't get stuck in the groove between the padding, but once placed, they stay in place on my nose and aren't pushed up like other helmets tend to do (if I'm lucky enough to even get them on). The helmet isn't heavy. I marked narrow because I think that's what my head shape is. There's also a plastic shield you place inside the face shield and it absorbs moisture. Seems to work ok so far, but winter isn't hear yet. The fog seems to clear up really quick. And it's removable so you can take it out during summer. Air flow seems to be ok, but I didn't wear it while it was really hot, and I haven't played with all the vents. October 12, 2015
Excellent budget helmet Great budget helmet, feels sturdy, comfortable, and affordable. October 5, 2015
Great helmet Thanks for walking me through with this helmet! It's working great September 28, 2015
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Have a functionality, fit, or otherwise product-specific question about the HJC FG-17 Lorenzo Mamba Helmet? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

HJC FG-17 Lorenzo Mamba Helmet
Already Asked: 2 Questions, 6 Answers
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RevZilla Store asked: Why did you choose this?
James E: It's Snell rated and a good price Feb 4, 2015
Andrew H: Paint Scheme! Love HJC helmets! This helmet just looks mean and I can't wait to receive it. May 30, 2014
Eric R: Saw at the 2013 Indy MotoGP. What a bad-ass looking helmet. Feb 26, 2014
A shopper asked: Is this helmet available in a glossy finish, as this one available is a matte finish ? May 25, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Ahmad S: I bought the green colored helmet and it is also in a non glossy paint. It is though a great helmet, extremely comfortable and stable at high speed. May 25, 2014
Reply to Ahmad Good answer? Yes (0) No (0)
Timothy T: This one is Matte finish only. May 25, 2014
Reply to Timothy Good answer? Yes (0) No (0)
dsw q: Is matte finish May 25, 2014
Reply to dsw Good answer? Yes (0) No (0)