After researching manufacturer specifications, published industry standards, and aggregating feedback from V Star 1100 owners, we compared seven spark plug options for this popular cruiser. Our evaluation focuses on performance, durability, value, ease of installation, and safety. Whether you need a direct OEM replacement or a performance upgrade, this guide will help you choose the right plug for your bike.
| Photo | Product | Score | Buy |
|---|---|---|---|
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NGK Iridium IX BPR7EIX Top Pick Iridium tip, 0.6mm center electrode, heat range 7 |
9.4 | 🛒 Check Price |
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Denso Iridium Power IK27 Runner Up Iridium tip, 0.4mm center electrode, heat range 27 |
8.9 | 🛒 Check Price |
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NGK Standard Copper BPR7ES Best Value Copper core, nickel alloy electrode, heat range 7 |
8.4 | 🛒 Check Price |
|
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Denso Platinum TT PK20TT Long Life Twin-tip platinum, 0.4mm center electrode, heat range 20 |
8.1 | 🛒 Check Price |
 |
Autolite 3923 Copper Budget Pick Copper core, nickel alloy, heat range 7 (equivalent) |
7.8 | 🛒 Check Price |
|
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E3 Spark Plugs E3.36 Performance Alternative DiamondFire electrode, heat range 7 (equivalent) |
7.3 | 🛒 Check Price |
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Champion 8701 Copper Plus Classic Choice Copper core, nickel alloy, heat range 7 (equivalent) |
7.1 | 🛒 Check Price |
1. NGK Iridium IX BPR7EIX: Top Pick
In our evaluation, the NGK Iridium IX BPR7EIX stands out as the best overall spark plug for the V Star 1100. Based on manufacturer specs, the fine iridium tip (0.6mm) delivers superior ignitability and a more complete burn, which translates to smoother idle and better throttle response. Owner feedback consistently highlights improved performance and longevity, often lasting longer than standard copper plugs. The heat range 7 is the OEM recommended rating, ensuring proper thermal characteristics for this engine.
However, the premium iridium construction comes at a higher price point, making it less budget-friendly. If you are on a tight budget or plan to change plugs frequently, a copper plug might be more economical. But for most riders seeking a reliable, long-lasting upgrade, this is our top recommendation.
- Iridium center electrode provides long life and consistent spark
- Fine-wire design improves ignitability and throttle response
- Pre-gapped and direct fit for V Star 1100
Pros: Excellent performance and durability; Easy installation with pre-set gap
Cons: Higher cost than copper plugs
2. Denso Iridium Power IK27: Runner Up
The Denso Iridium Power IK27 is a close runner up in our comparison. With an even finer 0.4mm center electrode, it theoretically offers the best ignitability among iridium plugs. In practice, owners report crisp acceleration and reliable cold starts. The twin-tip design (iridium center and platinum ground) enhances durability. Specs indicate it meets OEM requirements for heat range and thread size.
That said, its price is often a bit higher than the NGK IX, and some users note that the ultra-fine tip may be more susceptible to fouling in older engines with oil consumption. If you have a well-maintained V Star 1100 and want maximum performance, this is a great choice. But for most, the NGK IX offers similar benefits at a slightly lower cost.
- Ultra-fine 0.4mm iridium electrode for powerful spark
- Platinum ground electrode for long life
- Direct replacement for V Star 1100
Pros: Very sharp throttle response; Long service life
Cons: Slightly more expensive than NGK IX
3. NGK Standard Copper BPR7ES: Best Value
For budget-conscious owners, the NGK Standard Copper BPR7ES is the best value plug. It is the exact OEM specification for the V Star 1100, meaning it matches the original heat range and reach. Owner feedback shows it delivers consistent performance for normal riding conditions. The copper core provides good heat transfer, and the nickel alloy electrode is durable enough for typical service intervals.
However, copper plugs wear faster than iridium or platinum types, so you will need to replace them more often (typically every 8,000-10,000 miles). If you ride hard or in dusty conditions, the gap may erode sooner. For those who prefer a set-and-forget solution, an iridium plug is a better long-term investment. But for simple, reliable, and cheap, this is hard to beat.
- OEM equivalent for V Star 1100
- Reliable performance at a low cost
- Widely available and easy to find
Pros: Very affordable; Proven reliability
Cons: Shorter lifespan than iridium plugs; Needs more frequent replacement
4. Denso Platinum TT PK20TT: Long Life
The Denso Platinum TT PK20TT is engineered for longevity. Its twin-tip platinum design means both the center and ground electrodes are platinum-tipped, reducing wear and maintaining gap over many miles. Based on manufacturer claims, these plugs can last up to 60,000 miles in some applications. For V Star 1100 owners who want to minimize maintenance, this is a solid choice.
However, the heat range 20 is slightly different from the OEM heat range 7 (NGK scale), which may cause slight differences in operating temperature. Some owners report no issues, but others note a slightly higher tendency for pre-ignition under heavy load. Additionally, the performance gain over copper is negligible. If you ride moderately and value long intervals, consider these. For performance seekers, an iridium plug is better.
- Twin-tip design with platinum on both electrodes
- Designed for extended service intervals
- Improved anti-fouling characteristics
Pros: Very long lifespan; Resistant to carbon fouling
Cons: Higher initial cost; May not improve performance over copper
5. Autolite 3923 Copper: Budget Pick
The Autolite 3923 is the most budget-friendly option we evaluated. It is a copper-core plug with a nickel alloy electrode, similar in design to the NGK BPR7ES but often sold at a lower price. Owner feedback is mixed: many find it works fine for basic riding, but some report misfires or shorter life compared to NGK. The heat range is equivalent to NGK 7, so it should be safe for the V Star 1100.
However, we noticed that quality control can be inconsistent, with some plugs arriving with incorrect gaps or visible defects. For a critical component like a spark plug, we recommend sticking with a more reputable brand if possible. If you are on an extremely tight budget and change plugs often, these can work. But for reliability, spend a little more on NGK or Denso.
- Very low cost per plug
- Direct fit for V Star 1100
- Good for stock engines
Pros: Extremely affordable; Easy to find at auto parts stores
Cons: Shorter lifespan than premium plugs; Variable quality control reported
6. E3 Spark Plugs E3.36: Performance Alternative
The E3 Spark Plug E3.36 features a patented DiamondFire electrode design that is supposed to create a larger flame kernel for more complete combustion. Some owners report noticeable gains in throttle response and fuel economy, while others see no difference. In our research, we found no independent dyno tests for the V Star 1100, so claims remain anecdotal. The heat range is compatible, but the plug is not OEM spec.
Durability is a concern: several owner reviews mention the plug failing or eroding faster than expected. Given the higher cost, the value proposition is weak. If you are curious about aftermarket designs and willing to experiment, give them a try. But for proven reliability, we suggest sticking with NGK or Denso.
- Unique diamond-shaped ground electrode
- Claims improved fuel efficiency and power
- Direct fit for V Star 1100
Pros: Unique design may improve combustion; Easy to install
Cons: Mixed owner reviews on actual gains; Higher price with questionable durability
7. Champion 8701 Copper Plus: Classic Choice
The Champion 8701 Copper Plus is a traditional copper plug that has been used in many motorcycles for decades. It is a direct fit for the V Star 1100 and meets the OEM heat range requirement. In our evaluation, it performs adequately for stock engines under normal riding conditions. Owner feedback is generally positive, though some note that they do not last as long as NGK equivalents.
We found that Champion plugs sometimes have inconsistent gap settings out of the box, requiring careful checking before installation. Additionally, the nickel alloy electrode may wear faster than NGK’s. For a classic, no-frills option, these work fine, but we recommend the NGK BPR7ES for better reliability and lifespan at a similar price point.
- Classic Champion quality
- Affordable copper construction
- Direct fit for many Yamaha models
Pros: Low cost; Widely available
Cons: Shorter lifespan than NGK copper; Some reports of poor quality control
Frequently Asked Questions
What is the correct spark plug gap for a V Star 1100?
The recommended spark plug gap for a Yamaha V Star 1100 is 0.6 to 0.7 mm (0.024 to 0.028 inches). Always check the gap with a feeler gauge before installation, even for pre-gapped plugs. An incorrect gap can cause misfires or poor performance.
How often should I replace spark plugs on a V Star 1100?
For copper plugs like the NGK BPR7ES, replacement is typically recommended every 8,000 to 10,000 miles. Iridium or platinum plugs can last 20,000 to 40,000 miles, but it’s wise to inspect them annually. Follow your owner’s manual for specific intervals.
Can I use a different heat range spark plug on my V Star 1100?
Stick with heat range 7 (NGK scale) for the V Star 1100. A colder plug (higher number) may foul, while a hotter plug (lower number) can cause pre-ignition and engine damage. Only change heat range if you have modified the engine (e.g., high compression) and consult a mechanic.
What is the difference between iridium and copper spark plugs for this bike?
Iridium plugs have a fine center electrode that requires less voltage to spark, improving ignitability and throttle response. They also last much longer. Copper plugs are cheaper and work well, but wear faster and need more frequent replacement. For most riders, iridium is a worthwhile upgrade.
Do I need to use anti-seize compound on spark plugs for the V Star 1100?
It is not recommended for modern plugs with plated threads. NGK and Denso advise against anti-seize as it can affect torque readings and cause over-tightening. If you use it, apply a tiny amount to the threads only, not the first few threads near the tip.
Our Verdict
After thorough research and comparison, our top pick is the NGK Iridium IX BPR7EIX for its excellent performance, durability, and perfect fit. The runner up is the Denso Iridium Power IK27, which offers slightly sharper response but at a higher price. For budget buyers, the NGK Standard Copper BPR7ES provides reliable OEM performance at a low cost.
