Sparkplugs

[cbhirkies]

Decided on getting a new spark plug for the bike and went with this Autolite plug. Gap on stock measures .022 and the Autolite has a gap of .031. I am also going to try the NGK BR6HS as well and am curious about the gap I should run on the plug I choose and how many washers to run on it.

 

[DAMIEN1307]

am curious about the gap I should run on the plug I choose and how many washers to run on it.

.025 is the standard gap for these "China Girl" motors of ours...lol.

 

[DAMIEN1307]

The washers on the NGK is a triple type crush gasket, no further gasket/washer is needed or necessary.

 

[cbhirkies]

The washers on the NGK is a triple type crush gasket, no further gasket/washer is needed or necessary.

Thanks. I just picked up the NGK after posting this and I’m going to gap it and install soon.

 

[Deleted member 33388]

I was having clearance issues with the ngk and was told to try the autolte 2976 and lately went to the 2974.

 

[DAMIEN1307]

I was having clearance issues with the ngk and was told to try the autolte 2976 and lately went to the 2974.

It is a rare occurence to have clearance issues with the NGK plugs, I believe your bike is one of those rare occurences though.

 

[ImpulseRocket]

I was having clearance issues with the ngk and was told to try the autolte 2976 and lately went to the 2974.

Alternative ngk option is to use a saw style plug (BPMR6A). They are 1/8" shorter on the threads, so they will clear the piston and the projected electrode gets the spark center pushed back out a little for better exposure. They also are shorter on top which is handy for tight spaces.

 

[Wrench]

Piston to S/P clearance
S/P indexing washers or aluminum or copper washer will raise the height of the S/P

Crush washers off old S/Ps can also be used, They will thread off with a little help from some pliers

 

[ImpulseRocket]

Piston to S/P clearance
S/P indexing washers or aluminum or copper washer will raise the height of the S/P

Crush washers off old S/Ps can also be used, They will thread off with a little help from some pliers

Stacking crush washers is not something I am the biggest fan of. It can work, but can also potentially be an issue.

 

[Wrench]

Stacking crush washers is not something I am the biggest fan of. It can work, but can also potentially be an issue

If ya don't have anything else, It'll work, But it's a PITA to get it off the old S/P