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Diamond Black Fuel Cap

Part Number 62778-10


Finish / Color: Black



Drift over to the dark side with the Diamond Black Fuel Cap.

  • Complements the Diamond Black Collection Fuel Gauge
  • Perfect addition to a "blacked-out" custom ride
  • Features a ratcheting design to ensure that the design faces the correct direction
  • Easy to install

Fits ’92-later XL, ’92-’17 Dyna® (except ’04-’17 FXD and FXDX, ’05-’06 FXDC and ’07 FXDSE), ’00-'17 Softail®, (except FXSTD and FXSTSSE) ’94-later Road King® and ’15-later Freewheeler® models. Does not fit models equipped with Original Equipment locking or tethered fuel caps. Use on ’13-’14 FXSBSE requires removal of stock flush mount trim ring.

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  • Model
  • Collection

    Diamond Black
  • Warranty

    1 year limited warranty – Go to for full details
  • Sold in Unit

  • In The Box

    Fuel cap only
Diamond Black Fuel Cap is rated 3.3 out of 5 by 10.
Rated 2 out of 5 by from Bought the LED Diamond Gas cap and The Diamond Cap I could not get two gas caps that match. The Led Cap is machined very lightly on the sides and the Gas cap was very deeply machined One would be darker ( The Diamond pattern on the side ) You would think Expensive parts would give you Quality and Consistency. All said seals good and looks good if you find two that match…… Denim Black Fat boy Lo
Date published: 2017-07-17
Rated 5 out of 5 by from Excellent Replacement Excellent replacement for the stock silver fuel cap on my 2017 Iron Denim Black. Simple upgrade.
Date published: 2017-02-28
Rated 1 out of 5 by from junk Well, I had to re-submit my review, which was considerably longer and more detailed, but since I used the "c" word I guess it got deleted. I'm not going to spend as much time on this one. The powder coat, or paint, or whatever coating they put on this is garbage. Fell off the seat the day I got it, hit the concrete and all dinged up. Pure $50 junk.
Date published: 2016-09-02
Rated 5 out of 5 by from Nice cap! Nothing really to say, looks good. No issues. Looks a lot better than stock.
Date published: 2016-05-18
  • y_2018, m_2, d_26, h_20
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.7
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_10
  • loc_en_US, sid_PA-04-6277810, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_harleydavidson

Will this rattle like the stock fuel cap?

Stock cap ratcheting mechanism does not stay tight and rattles. Will this fuel cap do the same?
Asked by: Therealtoddius

will this fit a 2011 blackline softtail

Asked by: DiRiva
Hi DiRiva, Yes, this Diamond Black Fuel Cap will fit a 2011 Blackline. Thank you for your question.
Answered by: FXS78
Date published: 2016-11-16


Will this fit a 2016 street bob on the side with the fuel gauge
Asked by: kprpv
Hello kprpv, Yes, The Diamond Black Fuel Cap will fit on the 2016 Street Bob. It will fit on the side. Thank you for your answer.
Answered by: Iceman25
Date published: 2015-09-15

This item is made of what material? it has an over-tighttenig system?

1-This item is made of metal, plastic or both? (explain please) 2-and it has an over-tighttenig system? (ratchet or something like that)
Asked by: christianjfb
Hello Christianjfb... The Diamond Black Fuel Cap has a combination of all the elements: 1) Under the cap and emblem you have aluminum--at the base of the retaining ring. 2) At the start of the housing for the fuel cap you have Black Poloyacetal to help tighten/keep the fuel cap tightened. 3) Aluminum/Metal at the twisted portion of the Fuel Cap. ***This item does not have an over-tightening system. Hope this helps!
Answered by: RowdyGrl79
Date published: 2016-03-14
  • y_2018, m_2, d_26, h_20CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.7
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_4
  • loc_en_US, sid_PA-04-6277810, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_harleydavidson

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    Prices listed are generally the Manufacturer's Suggested Retail Price (MSRP), excluding taxes and shipping. Prices at local dealerships may vary. All online orders will be fulfilled and shipped by
    Harley-Davidson Motor Company as the agent for the Selling Dealer.