10TEN JHL Pit Bike Comparison

10TEN JHL LK125 vs LK140: Which 17/14 Pit Bike Should You Choose?

The 10TEN JHL LK125 and LK140 use the same larger 17/14-inch pit-bike platform, with an 830mm seat height and 1250mm wheelbase. The main difference is the engine: the LK125 produces a claimed 7.5 hp, while the Zongshen-powered LK140 increases this to 9.5 hp.

The quick answer

Choose the 10TEN JHL LK125 if the rider needs the space of a larger 17/14 chassis but would benefit from the more manageable 7.5 hp 125cc engine.

Choose the 10TEN JHL LK140 if the rider is already confident using a manual clutch and wants stronger performance from the 9.5 hp Zongshen W140 engine. Both bikes are the same physical size.

The same chassis with two different engines

Unlike the comparison between the smaller MK125 and the LK125, choosing between the LK125 and LK140 is not a question of physical size.

Both models use the same larger LK chassis, with 17-inch front and 14-inch rear wheels, an 830mm seat height and a 1250mm wheelbase. They also share the same overall dimensions, suspension arrangement, aluminium wheels and hydraulic disc brakes.

The decision comes down primarily to engine performance, carburettor specification and how much power the rider is ready to manage.

LK125 vs LK140 specifications

The main difference: 125cc vs 140cc

The LK125 uses an HS125 four-stroke engine producing a claimed maximum of 7.5 hp. It is paired with a PE19 carburettor and four-speed manual gearbox.

The LK140 uses a Zongshen W140 four-stroke engine producing a claimed maximum of 9.5 hp. Its larger PE22 carburettor complements the increase in engine capacity and performance.

Both engines use a manual clutch, so neither bike removes the need to coordinate the throttle, clutch and gear lever. The LK125 simply provides a more manageable power level within the same full-size LK pit-bike chassis.

Will the LK140 provide more growing room?

No. The LK125 and LK140 have the same 830mm seat height, 1250mm wheelbase and 17/14-inch wheel combination. Moving to the LK140 provides more engine performance, not a larger riding position.

Why choose the LK125?

The LK125 suits riders who need the physical space of the larger LK chassis but do not necessarily require the additional output of a 140cc engine.

Its 7.5 hp HS125 engine should provide a more manageable introduction to a large-wheel manual pit bike. The bike still has a conventional clutch and four-speed gearbox, so the rider can develop the same essential clutch and gear-control skills.

Because the LK125 shares its dimensions and major chassis components with the LK140, choosing it does not mean accepting a smaller or less spacious bike.

• Large 17/14-inch wheel combination
• Roomy 830mm seat height
• More manageable 7.5 hp output
• Four-speed manual gearbox
• Electric and kick start
• Costs £100 less than the LK140

Why choose the LK140?

The LK140 is the stronger-performing version of the same 17/14 platform. Its Zongshen W140 engine produces a claimed 9.5 hp, giving it a 2 hp advantage over the LK125.

It is better suited to riders who are already comfortable operating a manual clutch and want stronger performance without moving away from the traditional large-wheel pit-bike format.

At £1,199, it costs £100 more than the LK125. Because the chassis equipment is so similar, that additional cost is primarily paying for the larger Zongshen engine and its increase in performance.

• Zongshen W140 four-stroke engine
• Claimed 9.5 hp maximum output
• Larger PE22 carburettor
• Four-speed manual gearbox
• Same 17/14 chassis as the LK125
• Best suited to a more confident rider

Is the LK140 worth the extra £100?

For a confident rider who will make use of the stronger 140cc engine, the LK140 represents a meaningful performance upgrade for a relatively small increase in price.

However, the LK125 may be the more sensible choice if the rider is still building confidence with a manual clutch or does not need the additional power. Both bikes have the same rider space, wheels, suspension layout and braking specification.

As with the rest of the 10TEN JHL range, the most powerful option is not automatically the most suitable one.

Will they handle differently?

Their basic handling characteristics should be similar because the two bikes use the same wheel sizes, tyres, wheelbase and suspension arrangement.

Both have 17-inch front and 14-inch rear aluminium rims, upgraded aluminium hubs, wheel locks and 70/100-17 front and 90/100-14 rear tyres.

The most noticeable riding difference should therefore come from the engine. The LK140 offers stronger performance, while the LK125 should feel more manageable when learning to control the throttle and clutch.

Which model suits which rider?

Our verdict

Choose the LK125 when rider fit requires the larger 17/14 chassis but manageable performance remains important. It provides the same physical space and principal chassis specification as the LK140 with a less powerful 125cc engine.

Choose the LK140 for an experienced or progressing rider who can properly use the additional performance. Its Zongshen W140 engine and claimed 9.5 hp make it the stronger option, while the £100 price difference is relatively modest.

Neither bike provides more growing room than the other. The correct decision depends on the rider's experience and desired engine performance rather than their physical size.

Frequently asked questions

Continue comparing the 10TEN JHL range

• 10TEN JHL pit bike range explained
• Which 10TEN JHL pit bike should I buy?
• 10TEN JHL pit bike size guide
• 10TEN JHL MK110 vs MK125
• 10TEN JHL MK125 vs LK125
• 10TEN JHL MK vs LK pit bikes

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Explore the complete 10TEN pit bike range

Compare the different engine sizes, wheel combinations and transmission options available across the new 10TEN JHL range.