SHOW ME YOUR SPARK-PLUGS

[BWG56]

That's what happens when you use Harley plugs

 

[cdogg556]

That's what happens when you use Harley plugs

What took ya so long?

Were you doing your chores?

Lol! House

 

[BWG56]

I'm gettin older and besides that I rode the short bus to school, or was it school, hmmmm

And yes had to get house work done, if I don't she gives me twice as much the next day.

 

[cdogg556]

I'm gettin older and besides that I rode the short bus to school, or was it school, hmmmm
And yes had to get house work done, if I don't she gives me twice as much the next day.

Your loving it! Ain't ya!

 

[francoblay1]

 

[liferider]

Wow with a little imagination this thread title could end up in the alley

 

[BWG56]

To get back on topic, here's mine

 

[john sachs]

To get back on topic, here's mine

View attachment 54410

IME.
If you're using those plugs, and the heat range is correct for your engine, they are the best plugs available for your V-Twin engine.
John

 

[Mike manson]

This may be a dumb question I’m going to get new plugs now I have 2005 ridgeback anyone know what champion plug goes in someone used ngk and wanna make sure they didn’t put wrong plug in


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[francoblay1]

I have always used Autolite. Here is a quote from S&S......


"S&S has used the following spark plugs in V2-Style Long Blocks with good results: Autolite 4265, Champion RN12YC, Harley-Davidson 5R6A, and NGK BPR 4ES.

Install spark plugs with gap recommended by ignition manufacturer. Typically, .035-.045" is recommended for electronic ignitions."

Also the spark travels at the same speed reguardless of the gap, HOWEVER, this will
alter the ingition time slightly. Brought to you from the friendly folks at NASCAR.
Tighten gap for high RPM wider for low RPM, you can also change the heat range
of the plug for city or hot rodding, this will keep holes from forming in the piston.

Here is a quote from S&S......


"S&S has used the following spark plugs in V2-Style Long Blocks with good results: Autolite 4265, Champion RN12YC, ( @BWG56 why yours are different? cooler? hotter? ), Harley-Davidson 5R6A, and NGK BPR 4ES.

Install spark plugs with gap recommended by ignition manufacturer. Typically, .035-.045" is recommended for electronic ignitions."

Also the spark travels at the same speed reguardless of the gap, HOWEVER, this will
alter the ingition time slightly. Brought to you from the friendly folks at NASCAR.
Tighten gap for high RPM wider for low RPM, you can also change the heat range
of the plug for city or hot rodding, this will keep holes from forming in the piston

 

[BWG56]

Here is a quote from S&S......


"S&S has used the following spark plugs in V2-Style Long Blocks with good results: Autolite 4265, Champion RN12YC, ( @BWG56 why yours are different? cooler? hotter? ), Harley-Davidson 5R6A, and NGK BPR 4ES.

Cause its the plug that's recommended And John said so

 

[Mr. Wright]

And gap them at.038"

 

[francoblay1]

And gap them at.038"

so.... I´ve always read here we should gap them at 40 ????
What difference does it makes?

" Also the spark travels at the same speed reguardless of the gap, HOWEVER, this will
alter the ingition time slightly. Brought to you from the friendly folks at NASCAR.
Tighten gap for high RPM wider for low RPM, you can also change the heat range
of the plug for city or hot rodding, this will keep holes from forming in the piston...."

 

[BWG56]

so.... I´ve always read here we should gap them at 40 ????
What difference does it makes?

" Also the spark travels at the same speed reguardless of the gap, HOWEVER, this will
alter the ingition time slightly. Brought to you from the friendly folks at NASCAR.
Tighten gap for high RPM wider for low RPM, you can also change the heat range
of the plug for city or hot rodding, this will keep holes from forming in the piston...."

see sticker above

 

[Mr. Wright]

Here's the link to where John said .035''. I just prefer .038''

http://www.bigdogbiker.com/posts/823229/




john sachs Active Member
s
Get rid of those Bogus plugs with the plate for a ground strap. Use the right heat range for your motor, and the proper plug. Set the gap @ .035".
Ain't no magic in any fancy style plug. Always more trouble than their worth, and makes your wallet a lot lighter.
John
Forgot to mention, a carbureted V-twin will run richer in the rear cylinder.
Take a compression test. Check your engine for a possible vacuum leak. Front cylinder looks rich.

#156 john sachs, Sep 15, 2017
Last edited: Sep 15, 2017

 

[BWG56]

As a plug gets mileage on them in the 10's of thousands of miles, the gap starts to widen. I change my plugs every year or 1500-2500 miles for $5, so I just use the stock recommended setting at .040.
But to each their own, what ever works for ya.

 

[BWG56]

IME.
If you're using those plugs, and the heat range is correct for your engine, they are the best plugs available for your V-Twin engine.
John

The RA8HC is a hot plug in that series
RA6HC
RA4HC
RA2HC

 

[Th3InfamousI]

Here is a quote from S&S......


"S&S has used the following spark plugs in V2-Style Long Blocks with good results: Autolite 4265, Champion RN12YC, ( @BWG56 why yours are different? cooler? hotter? ), Harley-Davidson 5R6A, and NGK BPR 4ES.

Install spark plugs with gap recommended by ignition manufacturer. Typically, .035-.045" is recommended for electronic ignitions."

Also the spark travels at the same speed reguardless of the gap, HOWEVER, this will
alter the ingition time slightly. Brought to you from the friendly folks at NASCAR.
Tighten gap for high RPM wider for low RPM, you can also change the heat range
of the plug for city or hot rodding, this will keep holes from forming in the piston

Franco the RN12YC is NOT the right plug for the 117 it's for the 107 and they sure as hell won't fit. The thread on the 107 is much bigger than the 117.




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[francoblay1]

Franco the RN12YC is NOT the right plug for the 117 it's for the 107 and they sure as hell won't fit. The thread on the 107 is much bigger than the 117.
Sent from my 2PS64 using Tapatalk

Thanks Eric!

 

[BWG56]

Franco the RN12YC is NOT the right plug for the 117 it's for the 107 and they sure as hell won't fit. The thread on the 107 is much bigger than the 117.

Sent from my 2PS64 using Tapatalk

RA 12mm threads, 117
RN 14mm threads, 107