Harley Davidson Battery Size Chart 2026: Complete Guide

Short answer: Harley-Davidson uses four main battery sizes on its modern motorcycles. Touring models from 1997 on and Trikes from 2009 on take H-D AGM battery 66000340, a 166 x 126 x 175 mm case. Softails from 1997 on, Dynas from 1997 to 2017 and several other families take 66000343, a 175 x 87 x 155 mm case. Dynas and Softails from 1991 to 1996 take 66000344. Sportster XL models from 2004 on, the Street (XG) and several newer Revolution Max models take 66000345, a smaller 150 x 87 x 145 mm case. Yuasa's matching AGM batteries are rated 400, 310 and 200 cold cranking amps respectively.

The part numbers and fitment come from Harley-Davidson's own product pages for 66000340, 66000343, 66000344 and 66000345, all read on 2026-10-26. Dimensions, capacities and cold cranking amps come from the Yuasa 2024 Battery Application Guide, read the same day, because Harley-Davidson does not print those figures on its product pages. Care, charging and terminal torque figures come from Harley-Davidson's instruction sheet J01575, AGM Sealed 12 Volt Batteries, dated 2018-05-03. Always confirm fitment for your exact VIN with H-D's "Make sure this part fits" tool or a dealer.

Harley-Davidson battery size chart by model family

This is the core chart. Each row is a current H-D AGM Original Equipment battery and the models Harley-Davidson says it fits, in H-D's own wording. The old part number in the third column is the one H-D says the new part "is equivalent to", which is useful when the label on your current battery shows the older number.

A few things in H-D's fitment lines are easy to miss. The 66000343 covers 2007 to 2017 V-Rods, "except '07 VRSCR", so that one V-Rod variant is not on the same battery. The 66000343 also lists 1997 to 2003 XL Sportsters, which share the bigger Softail-style case, while 2004 and later XL models move to the smaller 66000345. And the 66000345 now reaches well beyond the Sportster, with H-D listing the Street (XG) from 2015, the 2021 to 2023 Revolution Max models and the 2024 and later RH1250S and RH975.

Battery dimensions and ratings for each Harley battery size

Harley-Davidson's product pages do not give dimensions, amp-hours or cold cranking amps. Yuasa, which supplies the replacement batteries most aftermarket buyers end up comparing against, publishes all three in its application guide. The table below takes Yuasa's own model listing for each H-D family and pairs it with Yuasa's specification rows. Yuasa states its dimensions to within plus or minus 2 mm.

The pattern is simple once you see it laid out. The Touring battery is the odd shape: shorter than the Softail battery at 166 mm but much wider, at 126 mm against 87 mm, and taller at 175 mm. The Softail and Dyna battery and the Sportster battery share the same 87 mm width, but the Softail case is 25 mm longer and 10 mm taller. That is why a Sportster battery will not simply drop into a Softail, or the reverse, even though the terminals look alike.

Yuasa's GYZ line is its higher-output AGM range. For the Touring family, the GYZ32HL has the same 166 x 126 x 175 mm case as the YIX30L-BS but is rated 500 CCA and 32 Ah against 400 CCA and 30 Ah. For the Softail and Dyna family, the GYZ20HL is rated 320 CCA and 20 Ah against 310 CCA and 18 Ah for the YTX20HL-BS, again in the same case. For the Sportster, the GYZ16HL gives 240 CCA and 16 Ah against 200 CCA and 12 Ah. Our guide to CCA, reserve capacity and amp-hour ratings explains what those numbers measure, and whether you need the extra is covered in is a higher CCA battery better.

Older Harley-Davidson models: what Yuasa lists

H-D's current AGM range is aimed at models from 1991 on. For older bikes, Yuasa's application guide is the most complete published source. These rows are Yuasa's listings, not Harley-Davidson's, so treat them as a starting point and confirm against the battery that is in the bike or the service manual for its year.

Two things stand out in Yuasa's older listings. First, many 1970s to mid-1990s FX, FXR, Softail and Sportster models share the YTX20H-BS, the same 175 x 87 x 155 mm case as the later Softail battery but with the opposite terminal layout. Yuasa's own numbering key explains the suffixes: in a type like YTX20HL-BS, the H means higher CCA, the L marks the polarity location, and BS means bottle-supplied electrolyte. So the H-BS and HL-BS share a case but put the terminals on opposite sides. Second, the early Touring models from 1965 to 1984 and the electric-start XLH Sportsters from 1967 to 1978 use the YHD-12H, a much larger battery at 206 x 133 x 165 mm.

Where Yuasa and Harley-Davidson disagree

For most families the two sources line up, but not all. The clearest gap is the Pan America. Harley-Davidson's page for 66000343 lists "'24-later RA1250, RA1250S, RA1250SE and '26 RA1250S", which is the larger 175 x 87 x 155 mm Softail-style battery. Yuasa's guide lists the Pan-America from 2021 on with the GYZ16HL and YTX14L-BS, which are Sportster-size batteries. Those are different cases. One explanation is that the earlier and later Pan America models use different batteries, which would fit H-D listing only 2024 and later, but neither source says so directly.

If you ride a Pan America, do not buy from either chart alone. Read the label on the battery in the bike, then use H-D's fitment check for your VIN or ask a dealer. The same advice applies to any model year at the edge of a range, since a mid-year change can move a model from one battery to another. Our article on mid-year model changes explains why that happens.

A smaller difference is the end date. Yuasa lists the Touring and Softail rows as '97-'23 and '91-'23, while H-D's pages say "'97-later". That is most likely just the age of the guide, published in 2024, rather than a change in battery.

AGM, lithium and conventional: which type to fit

Harley-Davidson's AGM motorcycle battery FAQ says an absorbed glass mat battery "is featured as original equipment on all new Harley-Davidson motorcycles". It explains that the glass mat holds the electrolyte "in a dry state rather than in a liquid as in a flooded battery", and lists vibration resistance and spill-proof construction among the benefits. That is the type the charts above are built around.

Yuasa sells its AGM batteries two ways. A factory-activated (FA) battery is "filled with electrolyte, sealed and charged at the factory" and "cannot be stored indefinitely". A bottle-supplied (BS) battery ships dry with its own acid pack, and Yuasa says dry AGM batteries "have a shelf life of 5 years from the manufacturer, as long as they remain sealed." The "-BS" at the end of a part like YTX20HL-BS is that bottle-supplied form. For every V-Rod, Yuasa's application rows specify factory-activated batteries (YTX20HL FA for 2007 to 2017, YTX14H FA for 2002 to 2006 and the 2007 VRSCR), so the bottle-supplied versions are not what Yuasa lists there.

In Yuasa's Harley-Davidson listings, the conventional-battery column is filled in mainly for older models. If you are weighing a change of type on any vehicle, our article on replacing a flooded battery with AGM covers what the charging system expects. Lithium batteries are sold for many Harleys as aftermarket parts. Neither Harley-Davidson's AGM pages nor Yuasa's application listings used here cover them, so check the lithium maker's own fitment and charging instructions.

How to check your Harley's battery size

1. Read the label on the battery now fitted. An H-D battery shows its part number, such as 66000343 or an older 65989-97 number. The chart above maps the older numbers to the current ones.
2. Identify the model family and year. The model code on the frame or registration (FLH, FXST, XL and so on) and the model year decide which row applies. Our guide on where to find vehicle specs lists where else these numbers appear.
3. Use H-D's fitment check. Harley-Davidson's product pages include a "Make sure this part fits" tool. Instruction sheet J01575 also points owners to "the P&A Retail Catalog or the Parts and Accessories section of www.harley-davidson.com" for fitment.
4. Compare case size and terminal side. If you are buying a non-H-D battery, match the dimensions and the terminal layout to the chart, not just the voltage.
5. Match or exceed the cold cranking rating. Pick a battery at least as strong as the original. A higher-rated battery in the same case, such as a GYZ model, is an option if you start the bike in cold weather.

Charging, testing and storage: Harley-Davidson's numbers

Harley-Davidson's instruction sheet J01575 gives a simple open-circuit voltage test for its sealed AGM batteries. With the battery disconnected, H-D's table reads:

H-D says that if the reading "is below 12.7 V, charge the battery and then check the voltage again after the battery has set for one to two hours." If it is 12.7 V or above, the next step is a load test. The same sheet gives typical charging times by battery size and charger rate. For the 28 Ah Touring batteries, a fully discharged battery (11.8 V) takes about 6.6 hours on a 5 amp charger and 38.3 hours on a 0.75 amp charger. For the 7.5 to 19 Ah Softail-size batteries the figures are 4.8 and 26.3 hours, and for the 12 Ah Sportster-size batteries 3.4 and 17 hours. H-D notes that the times are "for reference", based on Battery Tender charger sizes, and that the chargers are automatic.

For storage, H-D says to remove the battery and charge it fully if the motorcycle will not be ridden "for several months". It recommends charging "every month if stored at temperatures below 60 °F (16 °C)" and more often in a warm area, and warns that a discharged battery can freeze and crack. Its instructions also say to "remove battery from motorcycle before charging", because electrolyte leakage can damage motorcycle parts.

When fitting the battery, H-D's sheet gives a terminal bolt torque of 6.8 to 7.9 N·m (60 to 70 in-lbs) and warns that over-tightening can damage the terminals. It also says to connect the positive cable first. On 1980 to 1992 models, battery 66010-82B needs the terminal adapter kit 66056-00, which H-D says is packaged with the battery. If you want to record these figures alongside your other specs, our guide on owner's manual vs service manual explains which book carries which number.

Worked examples

A 2012 Road King needs a battery

The Road King is a Touring model, so the H-D part is 66000340, which H-D says replaces 66010-97E. Yuasa lists the YIX30L-BS (30 Ah, 400 CCA) or the GYZ32HL (32 Ah, 500 CCA) for 1997 to 2023 FLH, FLT and FLR models, both in a 166 x 126 x 175 mm case. Any of the three is the same size. Pick by cranking rating and budget.

Swapping a 2010 Sportster 883 battery

A 2010 XL is in H-D's "'04-later XL" range, so it takes 66000345. Yuasa lists the YTX14L-BS (12 Ah, 200 CCA) or the GYZ16HL (16 Ah, 240 CCA) for 2004 to 2023 XL models, at 150 x 87 x 145 mm. A Softail battery from the 66000343 family is 25 mm longer and 10 mm taller, so it is not a substitute.

A 1995 Fat Boy with an old 65989-90 battery

H-D says its 66000344 "is equivalent to battery part number 65989-90B" and fits 1991 to 1996 Dyna and Softail models. Yuasa lists the YTX20HL-BS or GYZ20HL for Softails from 1991 on, in the 175 x 87 x 155 mm case. So the current H-D part and both Yuasa options match.

Common mistakes

• Buying by voltage alone. Every modern Harley battery is 12 volts, but the cases differ by up to 39 mm in width.
• Ignoring the terminal layout. Yuasa's H and HL versions of the same case have the terminals on opposite sides. A battery with the posts on the wrong side may not reach the cables.
• Charging in the bike. H-D's instructions say to remove the battery first.
• Over-tightening terminal bolts. H-D's figure is 60 to 70 in-lbs, far below what most people apply by feel with a wrench.
• Trusting one chart at a range boundary. The Pan America shows that H-D and Yuasa can list different batteries for the same name.

Frequently asked questions

What battery does a Harley-Davidson Touring bike take?

Harley-Davidson lists AGM battery 66000340 (equivalent to 66010-97E) for 1997 and later Touring models and 2009 and later Trikes. Yuasa's matching batteries, the YIX30L-BS (400 CCA) and GYZ32HL (500 CCA), measure 166 x 126 x 175 mm.

What size battery is in a Harley Softail?

For 1997 and later Softails, Harley-Davidson lists AGM battery 66000343. Yuasa lists the YTX20HL-BS (18 Ah, 310 CCA) and GYZ20HL (20 Ah, 320 CCA), both 175 x 87 x 155 mm. For 1991 to 1996 Softails, H-D lists 66000344.

What battery fits a Harley Sportster?

2004 and later XL Sportsters take H-D battery 66000345 (equivalent to 65958-04C). Yuasa lists the YTX14L-BS (200 CCA) and GYZ16HL (240 CCA) at 150 x 87 x 145 mm. 1997 to 2003 XL models use the larger 66000343.

Is 66000343 the same as 65989-97?

Harley-Davidson says battery 66000343 "is equivalent to battery part number 65989-97E". The final letter changes over time; H-D's instruction sheet notes the "final letter of part number subject to change".

What voltage should a Harley battery read?

Harley-Davidson's instruction sheet J01575 gives 12.7 V as 100% charged, 12.6 V as 75%, 12.3 V as 50%, 12.0 V as 25% and 11.8 V as fully discharged, measured with the battery disconnected.

What is the torque for Harley battery terminal bolts?

H-D's instruction sheet J01575 specifies 6.8 to 7.9 N·m (60 to 70 in-lbs) and warns that over-tightening can damage the terminals.

Can I use a bigger battery in my Harley?

Only if it fits the tray, hold-down and cables. The model families use different cases, so a higher-output battery in the same case, such as Yuasa's GYZ versions, is the usual way to get more cranking amps.

How should I store a Harley battery over winter?

Harley-Davidson says to remove the battery and charge it fully if the bike will sit for several months, then charge it every month if stored below 60 °F (16 °C), and more often in a warmer place.

Sources

• Harley-Davidson USA, H-D AGM Original Equipment Battery product pages 66000340A, 66000343A, 66000344A and 66000345A, read 2026-10-26. Fitment, equivalent part numbers.
• Harley-Davidson, J01575 Harley-Davidson AGM Sealed 12 Volt Batteries, 2018-05-03, read 2026-10-26. Voltage test, charging times, storage, terminal torque, warranty.
• Harley-Davidson, AGM Motorcycle Battery FAQs, read 2026-10-26.
• Yuasa Battery, Inc., 2024 Battery Application Guide (PDF), read 2026-10-26. Harley-Davidson application listings, dimensions, capacity, CCA, FA and BS definitions.