Correct Spark Plug Gap

[wayne]

For the A9EFV (very early plug)- 0.55 mm or 0.022"

For the A9EFP (later gold palladium plug)- 0.813 mm or 0.032"

Torque setting for the 18 mm conical seat plug in an alloy head from NGK is 20-30 nm but tread carefully. Dislocating the plug insert was a problem on the RE5s, so much so that Suzuki advised not using the bike's standard toolkit extension bar when torquing the spark plug.

For the full explanation of gaps and some history of the plugs:

re5rotary.proboards.com/thread/3279/spark-plug-gaps-story-costanzo

[timpa136]

Nov 22, 2022 0:31:15 GMT -5 wayne said:

For the A9EFV (very early plug)- 0.55 mm or 0.022"

For the A9EFP (later gold palladium plug)- 0.813 mm or 0.032"

Torque setting for the 18 mm conical seat plug in an alloy head from NGK is 20-30 nm but tread carefully. Dislocating the plug insert was a problem on the RE5s, so much so that Suzuki advised not using the bike's standard toolkit extension bar when torquing the spark plug.

For the full explanation of gaps and some history of the plugs:

re5rotary.proboards.com/thread/3279/spark-plug-gaps-story-costanzo

I'm not ashamed to admit I never read the A model owners guide for spark plug gap and am still setting a tight 022"

tim

[wayne]

And I'll bet it's never hurt the bike Tim.