Performance Guides
Best Iridium Spark Plug for Your Bike (2026): NGK vs NGage, by Model
The best iridium spark plugs for your bike in 2026: NGK Iridium IX and NGage Double Iridium, whether they are worth it, and the right plug for your model.
The best iridium spark plugs for bikes in India in 2026 are the NGK Iridium IX and the NGage Double Iridium, priced from about ₹485 to ₹899. Iridium plugs use a very fine centre electrode that fires a stronger, more reliable spark, so they sharpen cold starts and idle and last far longer than ordinary plugs. The key is to fit the exact plug specified for your bike, with the correct heat range and gap. This guide covers both brands, what they cost, and the right plug for your model.
You can browse all iridium spark plugs while you read.
What is the best spark plug brand for bikes?
Two brands lead in India: NGK, the original-equipment standard whose Iridium IX range upgrades most bikes, and NGage, whose Double Iridium plugs use a precious-metal tip on both electrodes. Here is how they compare.
| Brand | Type | Known for | Popular fits | Price from |
|---|---|---|---|---|
| NGK | Iridium IX | OE-standard quality, huge fitment range | RE 650, Himalayan 411, KTM, Pulsar, Dominar, CB350, Gixxer | ₹485 |
| NGage | Double Iridium | Iridium on both electrodes, model-specific plugs | RE J-series 350, 650, Himalayan and Guerrilla 450, KTM, Triumph 400, BMW G310 | ₹899 |
Some bikes use more than one plug. Check the product page for the exact plug and quantity your model needs.
Are iridium spark plugs worth it?
Yes, for most modern bikes an iridium plug is worth it. Iridium is very hard and lets the centre electrode be made very fine, which concentrates the spark and needs less voltage to fire. In practice that means easier cold starts, a smoother idle, more consistent running on fuel-injected bikes, and a much longer service life than a standard nickel plug. The gains are about reliability and longevity rather than big power, so think of an iridium plug as cheap insurance for clean, dependable ignition.
Iridium vs normal (nickel) spark plugs
- Spark quality: the fine iridium electrode fires a stronger, more focused spark than a thicker nickel electrode.
- Cold starts and idle: iridium lights the mixture more reliably, so starts and idle are smoother.
- Life: iridium resists wear far better and lasts much longer between changes.
- Price: iridium costs more up front, but the longer life and steadier running make it worth it on most modern engines.
NGK Iridium IX spark plugs
NGK is the brand most bikes leave the factory with, and its Iridium IX line is a direct upgrade. Popular options:
- CR7EIX for the Royal Enfield Himalayan 411, Interceptor 650, Continental GT 650 and Super Meteor 650, ₹865.
- CPR8EAIX-9 for the Honda H'ness CB350 and CB350RS and the Bajaj Dominar 250 and 400, ₹865.
- LKAR8AI-9 for the KTM Duke, RC and Adventure 125 to 390 and the Bajaj Pulsar NS, RS and NS400Z, ₹485.
- CPR7EAIX-9 for the Suzuki Gixxer 155 and 250, ₹865.
See the range on the NGK Spark Plugs collection.
NGage Double Iridium spark plugs
NGage Double Iridium plugs carry a precious-metal tip on both the centre and the ground electrode for an even stronger, longer-lasting spark, and come model-specific at ₹899. Coverage includes:
- DH7RTII-8 for the Royal Enfield J-series 350 (Classic, Bullet, Meteor, Hunter).
- B8RII-8 for the Royal Enfield Himalayan 411 and all 650 models (Interceptor, GT, Bear, Super Meteor, Shotgun, Classic 650).
- BN8RTIIA-9 for the Royal Enfield Himalayan 450 and Guerrilla 450.
- VH8RTII-9 for the KTM Duke, RC and Adventure, the Bajaj Pulsar NS and RS 200, and the Triumph Speed 400 and Scrambler 400 X.
See the full range on the Iridium Spark Plugs collection.
What is the best spark plug for Royal Enfield?
For Royal Enfield, fit an NGK Iridium IX or an NGage Double Iridium made for your model.
- Classic 350, Meteor 350, Hunter 350, Bullet 350 (J-series): NGage DH7RTII-8 Double Iridium (₹899).
- Interceptor 650, Continental GT 650, Super Meteor 650, Bear 650, Himalayan 411: NGK CR7EIX (₹865) or NGage B8RII-8 (₹899).
- Himalayan 450 and Guerrilla 450: NGage BN8RTIIA-9 (₹899).
Find these on the spark plugs collection or the Royal Enfield accessories and performance parts collection.
How to choose the right spark plug (fitment guidance)
- Match the exact plug for your model and year. Spark plugs differ in thread, reach, heat range and gap, so use the plug listed for your bike.
- Check how many you need. Singles take one, the 650 twins take two, and triple-spark bikes such as the Bajaj Pulsar take a centre plug plus side plugs.
- Keep the right gap. Iridium plugs come pre-gapped for most bikes; do not force the fine electrode.
- Change them as a set on multi-cylinder bikes for even running.
If you are not sure which plug your bike needs, our team is happy to offer fitment guidance before you order.
Why buy spark plugs from Rawtorque
- Genuine plugs from NGK and NGage, sold by a registered Indian business.
- Partial COD on serviceable pincodes: pay a small advance online to confirm, balance on delivery.
- Free shipping on selected products and regions, dispatch in 1 to 2 business days, delivery in 3 to 7 business days across India.
- 5 day returns on unused, uninstalled plugs in original packaging.
- Fitment guidance from our team so you order the right plug the first time.
Frequently asked questions
Which is the best spark plug brand for bikes?
NGK and NGage are the best spark plug brands for bikes in India. NGK Iridium IX is the original-equipment standard with a huge fitment range, while NGage Double Iridium uses a precious-metal tip on both electrodes. Both are strong upgrades, from about ₹485.
Are iridium spark plugs worth it?
Yes. Iridium plugs fire a stronger, more reliable spark, improve cold starts and idle, run more consistently on fuel-injected bikes, and last much longer than standard nickel plugs. The benefit is reliability and longevity rather than big power, which makes them worth it on most modern bikes.
What is the difference between iridium and normal spark plugs?
An iridium plug has a very fine, hard centre electrode that fires a stronger, more focused spark and resists wear, so it lasts far longer. A normal nickel plug has a thicker electrode, costs less and wears faster. Iridium is the better long-term choice for most modern engines.
What is the best spark plug for Royal Enfield?
For the J-series 350 use an NGage DH7RTII-8. For the Himalayan 411 and the 650 twins use an NGK CR7EIX (₹865) or NGage B8RII-8 (₹899). For the Himalayan 450 and Guerrilla 450 use an NGage BN8RTIIA-9.
How long do iridium spark plugs last?
Iridium plugs last much longer than standard plugs thanks to the hard, wear-resistant electrode. Follow the change interval in your owner's manual, and always replace with the exact plug specified for your bike.
How many spark plugs does my bike need?
A single-cylinder bike uses one plug, the Royal Enfield 650 twins use two, and triple-spark bikes such as the Bajaj Pulsar NS200 and RS200 use a centre plug plus side plugs. Check the product page for the right quantity for your model.
Written by the Rawtorque Editorial Team. Rawtorque supplies genuine NGK and NGage iridium spark plugs, plus performance and braking upgrades, to riders across India. Last updated 19 June 2026.
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