Yamaha TRX850 Enthusiasts Forum

Just got mine and wanting to do a plug chop - any recommendations on plug choice, heard Iridiums can be problematic?

What did you hear about iridiums being problematic?
I have had them for ages, doing just fine.

Plus one on that.

plus two on that, you won't need to think about spark plugs for years

I had 1 fail within. 500km but that doesn't stop me from using them.
Pretty slim chance you'll get a bad one and usually it will fail shortly after fitting if its dodgey.
Benefits gained using iridium outweigh any negatives

Allways worked for me

Thank god i just grabbed my reading glasses. Thought the thread was butt plug.

Never had an issue with iridium plugs. Certainly worth the extra $$$ in my view.

Thanks guys, Iridiums it is then!

I've heard of the tips breaking and falling into bores on high power turbo charged cars causing damage.
Never heard of a problem on motorbikes though.

Stu99 wrote:
Thank god i just grabbed my reading glasses. Thought the thread was butt plug.

Never had an issue with iridium plugs. Certainly worth the extra $$$ in my view.

Hang on, you say you've never had any issues with Iridium butt plugs

kinky with 30,000v at 3 ohm.. Just don't have a belly full of wind or you may start pinging...

Rod.s wrote:

Stu99 wrote:
Thank god i just grabbed my reading glasses. Thought the thread was butt plug.

Never had an issue with iridium plugs. Certainly worth the extra $$$ in my view.

Hang on, you say you've never had any issues with Iridium butt plugs

never. But remember to use the correct plug temp for methane burn.

cobbadiggabuddyblooo wrote:kinky with 30,000v at 3 ohm.. Just don't have a belly full of wind or you may start pinging...

I'm running pressurised high octane Cobba, so no pinging issues.

Stu99 wrote:

Rod.s wrote:

Stu99 wrote:
Thank god i just grabbed my reading glasses. Thought the thread was butt plug.

Never had an issue with iridium plugs. Certainly worth the extra $$$ in my view.

Hang on, you say you've never had any issues with Iridium butt plugs

never. But remember to use the correct plug temp for methane burn.

Yep, you don't want to start any scrub fires down there, you could end up with a nasty Brazilian back burn

Or this.......