2 stroke spark plug colour

[Coog]

Can anyone advise if this is normal looking?

Colour seems OK to me but there's some white deposits on the plug?

Bike is a wee 50cc two stroke and seems going the very best, just want to make sure it's all OK

 

[Simon998]

Looks good to me. A bit old but not too lean lean/rich.

 

[Simon998]

That said, you don’t really know until you chop the threaded bit off and see the actual white bit.

Look up how to do a ‘plug chop’ online and that will tell you for sure.

 

[southsky sunrise]

@Nicky would be my go to guy for this advice

 

[Coog]

That said, you don’t really know until you chop the threaded bit off and see the actual white bit.

Look up how to do a ‘plug chop’ online and that will tell you for sure.

Probably best doing that with a new, fresh plug?

 

[Simon998]

That’s the only way to do it bud. I always buy a 4 pack of NGK plugs from eBay when I need one.

 

[KHI]

Plug chop is stopping the engine via the kill switch or ignition at Wide Open Throttle(main jet only) and removing the spark plug to get a true reading whether it is running rich or lean.

Judge yourself: How To Check Your Spark Plug for the Correct Carburetor Setting - TuningMatters.com

 

[dross432]

Better looking side on too it also. Check the tips are still nice and squared off not rounded

 

[scoobyman]

Looks like its running lean but with our **** fuel who knows

 

[DriftnSlide]

Looks fine, if not a touch lean, but still fine.
You're looking for a rich tea colour, worry more if you have any grey or white.
KHI is spot on with the plug chop.

 

[Apis]

Looks all right to me, but yeah the dots...do they really mean anything? I've done the thing where you cut the ign at full power but didn't know they called it "chopping". Is it some Fast n Furious/ American / youtube term?

"chopping" off the threads to look....I'm off to investigate that one.

 

[Simon998]

2strokestuffing on youtube (Swedish guy who loves his rum...) tunes 2 strokes in his shed and on his home made dyno (currently getting 28bhp from a 50cc, which is nuts). He has a couple of videos on how to do a proper plug chop and how to read the porcelain. I didn't know it was a thing until I had seen his video.

How To Read Your Spark Plugs, They Are Telling You What’s Going On in There « Rays-Shop

 

[Simon998]

Looks all right to me, but yeah the dots...do they really mean anything? I've done the thing where you cut the ign at full power but didn't know they called it "chopping". Is it some Fast n Furious/ American / youtube term?

"chopping" off the threads to look....I'm off to investigate that one.

Frank (Franks motorcycles lisburn) used to call it a plug chop back when I was a youth, so it must be an old timer term as I don't think he even knew the internet existed.

 

[Apis]

2strokestuffing on youtube (Swedish guy who loves his rum...) tunes 2 strokes in his shed and on his home made dyno (currently getting 28bhp from a 50cc, which is nuts). He has a couple of videos on how to do a proper plug chop and how to read the porcelain. I didn't know it was a thing until I had seen his video.

How To Read Your Spark Plugs, They Are Telling You What’s Going On in There « Rays-Shop

Cheers, never knew this.

 

[Simon998]

Login Required | 2strokeforum.com and Home | The RD LC Crazy UK 2 Stroke Forum are good sources for knowledge. They're a decent bunch of old timers who all seem a bit too into their 2t's.