A regular spark plug uses a copper central electrode whereas an iridium spark plug uses, you guessed it, iridium. The metal in a spark plug has a single purpose: to channel the electrical energy through the spark plug. A typical copper spark plug will last around 20, miles and most get changed at a major service usually around 16, miles but an iridium spark plug will be good for around 50, miles and you do see people running them to , miles with no issues.
Copper is generally seen as being the best metal to use in terms of conductivity but iridium plugs are seen as premium as they last longer than standard plugs and can be built with smaller tolerances. Iridium spark plugs also have lower voltage requirements, meaning they perform better when starting and idling and some manufacturers also claim they offer a better throttle response.
Most of mine are from the Halfords Advanced range formerly called Professional. Here are the essentials you need for smooth re-plugging:. This may sound simple but often the manual offers up some time-saving tips for your particular model. A decent tool kit will have them. Motorcycle spark plug socket sizes are usually 16mm, 18mm or Whereas the threads are usually 10mm, 12mm or 14mm.
When it comes to motorcycles, access is usually tricky, so my tip is to buy a magnetic spark plug socket like this one. Again, a decent toolset will have one. A spark plug gap gauge This nifty little tool only costs a few quid and will help you set the correct gap for your spark plug. Too loose and you risk an electrical short. What are the common motorcycle spark plug sizes? Thread diameters of 10mm, 12mm, and 14mm are the most common.
In fact, when it comes to motorcycles, it's rare to find any other sizes in use. How long should a spark plug last? Old Thread Alert! The last post was made 15 years, days ago. Instead of replying here, would creating a new thread be more useful? All times are GMT. You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You cannot download files in this forum.
Please explain your rating. Please be fair in your ratings! Log in or Sign up. Scooter Shack Scooter Forum. Piaggio Zip Messages: 3. Hi Guys, I'm a 'newbie' though I'm nearly 40, so be gentle with me! I bought a 03 Piaggio Zip 50 2 stroke about 6 months ago, it had been modified slightly, Polini kit, Endy Exhaust which I changed back to the factory fitted one immediately as it was just too Loud!
And a couple of other things Anyway, i've had pretty much trouble free riding since I got it, apart from having to change the belt, then last month it died on me. I do about a 10 mile round trip a day, so it never gets really warmed up, i'm using NGK plugs BR9ES I've heard a few people mention mixture settings too rich, but haven't a clue how to change this, i've slowed the idle down a bit to see if that helps, but no idea how to change the mixture or indeed if it is even the reason this is happening!
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