Plug chops

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Jun 15, 2020 | 11:55 AM

JonB

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Joined: Oct 2019

Posts: 75

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From: UK

Plug chops

Hi all, now the old girl has the mufflers/carb/filter that are staying On her, I went out and did some plug chops.

For info, New re-pop oem style mufflers (Which were crazy quiet) now with most of the guts removed and thunder torques (lollipops) in the ends.

oem uncut Oval air cleaner housing With new k and n filter

later kehein butterfly with the fast idle, four position choke. Has been modded with the Andrews pump bowl (same as early type) enlarged hole, plugged pump bypass. I have changed a tall thin No. 80 pump nozzle (which was a stream rather than a spray) for The earlier stubby no. 60 and positioned correctly.(All as recommended in donnys and easyriders tech tips books)

currently running what I think is an 88 pilot (although could be 68-it was difficult to tell) and a 160 main.

In the picture plugs 1 and 2 (front and rear) were fitted new and ran for around 8 miles on low throttle( 1/4 max)And the Insulator looks a reasonable colour to my (uneducated) eye

third plug is a front-fitted new, Immediate WOT through the gears then engine cut. No colour to the Center electrode, but definitely lean looking on the outer one.

any thoughts? I now have 170,175 and 180 mains and 65 to 88 pilots. Bike runs great, doesn’t bog or speed up if you back off full thottle

thanks as always-UK Jon

Jun 15, 2020 | 06:11 PM

johnjzjz

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Joined: Nov 2006

Posts: 12,878

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From: la la land jerzey

an uninterrupted road so you can travel as 55 or 60 MPH for 15 minuets - pull the clutch kill the engine - pull the plugs

picture the plugs under these conditions - unless you drive it all the time WOT then this is the way to read them