NGK Spark Plug LKAR8A-9 Plug || FREE UK Delivery | FREE UK Returns

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Size Chart

Helmets

It's easy to find the helmet size to fit you. Motorcycle helmets should fit snugly on your head even if you've got big hair. Ideally pressure should feel firm and even all over.
	To find the right helmet size, measure all the way around your head at the widest part from the front of your forehead right around the back of your head and back to the front again, keep the tape measure above your ears as shown (F) and make sure it feels firm but not overtight or too loose - all measurements in centimetres (CMs).

Motorcycle Helmets Sizing Chart
CMs Measured	53/54	55/56	57/58	59/60	61/62	63/64
Order Size	XS	S	M	L	XL	XXL

Childrens Motorcycle Helmets Sizing Chart
CMs Measured	50	51	52	53	54
Order Size	XS	S	M	L	XL

Jackets

Not sure what size to order? Simply grab a tape measure, a willing partner for those awkward to reach places and follow the guidelines below. And if by chance you did order the wrong size, don't worry that's why we've got the no quibbles 90 day money back guarantee.

A Chest:
Measure around the fullest part of your chest, passing the tape measure loosely under your arms and making sure it feels comfortable and not too overtight.

B Sleeve:
Measure from the end of your shoulder to the base of your thumb.
(Alternatively take a jacket that already fits well and measure the sleeve length).

Unisex Sizes: Please use the 'Mens Size' chart to find your size

Use your measurements to work out 'Your Order Size' from the tables below.

Please select your size chart:

Mens Sizes
Choose Your Order Size		A Your Chest	B Your Sleeve
(Continental Sizes)	(Mens/Unisex Sizes)	Inches	Inches
46	S	35-36½	24
48	M	37-38	24½
50	L	38½-39½	25
52	L	40-41	25½
54	XL	41½-42½	26
56	XXL	43-44½	26½
58	XXL	45-46	26¾
60	3XL	46½-47½	27
62	3XL	48-49	27
64	4XL	49½-50½	27½
66	4XL	51-52	27½
68	5XL	52½-53½	27½
70	5XL	54-55½	27½

Womens Sizes
Choose Your Order Size			A Your Chest	B Your Sleeve
(Continental Sizes)	(Womens Sizes) Do not use for 'Unisex' sizes	Standard UK Sizes Approx.	Inches	Inches
34	XS	6/8	30½-32	22½
36	S	8	32½-33½	23
38	M	10	34-35	23½
40	L	12	35½-37	23½
42	L	14	37½-38½	24
44	XL	16	39-40½	24
46	XL	18	41-42½	24½
48	XXL	20	43-44	24½

Trousers

C Waist:
Without bending measure around your waist making sure the tape measure feels comfortable, not overtight or too loose.

D Hips:
Measure around the widest part of your hips and bum.

E Outside leg:
Biking trousers are designed to sit slightly higher than everyday trousers.

Find a comfortable point above the waistband of a normal pair of trousers (closer to your actual waist - see point C on the diagram).

Without bending, measure from thispoint over your hip bone right down to the bottom of your feet (remember to make an allowance for boots or shoes).

Unisex Sizes: Please use the 'Mens Size' chart to find your size

Use your measurements to work out 'Your Order Size' from the tables below.

Mens Sizes
Choose Your Order Size		C Your Waist	D Your Hips	E Your Outside Leg
(Continental Sizes)	(Mens/Unisex Sizes)	Inches	Inches	Inches
46	S	31-32	37½-38½	41½
48	M	32½-34	39-40	41½
50	L	34½-35½	40½-41½	42½
52	L	36-37	42-43	42¾
54	XL	37½-39	43½-44½	43¼
56	XXL	39½-41	45-46	44
58	XXL	41½-42½	46½-48	44¾
60	3XL	43-44½	48½-49½	45¼
62	3XL	45-46½	50-51	45½
64	4XL	47-48½	51½-52½	46
66	4XL	49-50½	53-54	46½
68	5XL	51-52½	54½-55½	46½
70	6XL	53-54½	56-57½	46½

Womens Sizes
Choose Your Order Size			C Your Waist	D Your Hips	E Your Outside Leg
(Continental Sizes)	(Womens Sizes) Do not use for 'Unisex' sizes	Standard UK Sizes Approx.	Inches	Inches	Inches
34	XS	6/8	24-26	34-35	41½
36	S	8	26½-27½	35½-37	41½
38	M	10	28-29	37½-38½	41½
40	M	12	29½-30½	39-40	41½
42	L	14	31-32	40½-41½	42
44	L	16	32½-33½	42-43	42
46	XL	18	34-35	43½-44½	42½
48	XXL	20	35½-37	45-46½	42½

Boots

It's easy to find the right shoe size, just follow the steps below and have fun. Remember to wear your normal riding socks and if you're an all-year-round type you might want to make a bit of allowance for the winter woollies.
	Sole Measurement: Place both feet (in your normal riding socks) on a piece of paper and carefully draw the outline of each foot. Make sure you keep the pen pointing straight down to get a true outline! Then measure the lengths of both outlines from the top edge of your big toes to the back edge of your heel. If your two feet measure differently, take the longer of the two measurements and that's your size - all measurements in centimetres (cms).

Boot & Shoe Sizing Chart
Your Order Size (Shoes/Boots)	Your Order Size (Rain Overshoes)	UK Shoe Size	Your Sole Measurement (cm)
36		3½	up to 23.0
37	XS	4-4½	up to 23.6
38	XS	5	up to 24.3
39	S	5½	up to 25.0
40	S	6-6½	up to 25.6
41	M	7-7½	up to 26.3
42	M	8-8½	up to 27.0
43	L	9	up to 27.6
44	L	9½	up to 28.3
45	XL	10-10½	up to 29.0
46	XL	11-11½	up to 29.6
47	XXL	12	up to 30.3
48	XXL	12½	up to 31.0

Gloves

It's easy to find the glove size to fit you, but remember if you are planning to wear undergloves as well you may want to go up a size for comfort:
	To find your glove size, clench your hand slightly and measure your hand in a loop as shown, at the fullest part of your palm (H), bring the tape measure all the way round until it joins back at the beginning. If you fall in between sizes, choose the larger one - all measurements in centimetres (CMs)

Gloves Sizing Chart
CMs Measured	<15	<18	<21.5	<24	<27	<29.5	<32
Order Size	6	7	8	9	10	11	12
Glove Size	XXS	XS	S	M	L	XL	XXL
HELD Glove Sizes	XS	S	M	L	XL	XXL	XXXL

Childrens Gloves Sizing Chart
CMs Measured	13	14	15	16	17
Order Size	XXS	XS	S	M	L

motorcycle service >motorcycle spark plugs

NGK Spark Plug LKAR8A-9 Plug

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Motorcycle spark plugs that match your engine & your driving style. Available in iridium, platinum, nick & copper depending on your motorcycle. Improve ignition, fuel consumption & emissions with the right spark plug.

Find out more

Free UK Delivery
over £25 Free UK
Returns 0% Finance
Option G-Cash Loyalty
Scheme

Item Description

NGK Spark Plug LKAR8A-9 Plug | FX409644

Update and modernise your ignition: Spark plugs must accommodate the ever increasing demands of modern engines. They must taken into consideration dimensions, combustion chamber shape, cooling abilities, fuel and built-in ignition systems.

Why buy from NGK? NGK has developed and produced a range of spark plugs to suit different types of engines and riding requirements.

Created by those in the know: NGK work closely with engine and vehicle manufacturers to produce the ideal spark plug for each use. Spark plugs are only remade when absolutely needed to save cost for them and for the consumer.

Manufacturer Specification

• NGK have an extensive range of spark plugs to accommodate the increasing needs of modern engines
• Spark plug design must accommodate many features of an engine including physical dimensions, combustion chamber shape, cooling abilities, fuel & ignitions systems
• NGK have a selection of spark plugs to suit each engine & driving condition
• The 'S' type is the standard spark plug with a copper centre for quick heat distribution to prevent hot spots. The 'G' type has a smaller diameter centre electrode tip made of nickel which results in lower voltage required but reduced durability. The 'GV' type has an improved design for better gas flow & is better suited for racing situations. The 'VX' type has a small centre electrode of 0.8mm & a tapered ground electrode for better ignitability along with improved starting, idle stability & anti-fouling performance. The 'IX' type is similar to the 'VX' type with the use of iridium for an even smaller centre electrode without compromising durability. This type has the best performance in terms of starting, idling & throttle response.

Delivery & Returns

HOW WE DELIVER

We work closely with the Royal Mail and the main regional courier company for your country to ensure that your goods get to you reliably. Each delivery charge applies to the whole order: An order can contain several items and delivery will still be the same low cost.

HOW LONG YOUR DELIVERY WILL TAKE

UK Mainland deliveries offer you a choice of delivery options, from Pre 12 Next Day to 5-10 days Economy. Please expect 3-4 working days for other UK regions and Eire. Timing for European destinations depends on the country and varies from 2 to 4 days. Australia and New Zealand is now a fast UPS service of 2-3 days to most places.

You will find delivery rates here.

HOW DO RETURNS WORK

For every qualifying order there is one free return - so regardless of whether you are returning for a refund or exchange, you don’t need to worry about changing your mind. If you need a different item we'll send out your first exchange for free too! You'll receive a returns form with your order along with instructions to generate your freepost tracked returns label.

For your peace of mind, we operate a 365 day returns policy, so providing the item is unused, in showroom condition, complete with undamaged packaging, you can return it to us for an exchange or refund up to a year later.