So I did the first plug chop with the 48mm BBK on the 86 spree. I'm running stock oil pump and 40 to 1 in the tank. I have 4 1'' holes in the stock air box with a freshly oiled stock filter. Running a 100 main jet. Looks lean to me. Runs great at 3/4 throttle, not so great at full. Ran for about 30 seconds at full bore on a fresh plug. Below are the results. What do ya'll think?
Larry
1st Plug Chop with 48bbk. Thoughts?
Moderator: Moderator
Re: 1st Plug Chop with 48bbk. Thoughts?
Looks lean to me too. You need to mark the plug so you know which way it is facing in the cylinder. So we can determine what the plug is tell us overall.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
Re: 1st Plug Chop with 48bbk. Thoughts?
step up a jet and do another chop
1988 yamaha zuma
polini evolution kit
polini evolution 2 exhaust
polini big reed manifold
dellorto 21mm
keli clutch
keli variator
polini evolution kit
polini evolution 2 exhaust
polini big reed manifold
dellorto 21mm
keli clutch
keli variator
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Re: 1st Plug Chop with 48bbk. Thoughts?
which way exactaly should the plug face
1995 honda elite
50mm big bore
v8 pipe
high performance cdi and coil
50mm big bore
v8 pipe
high performance cdi and coil
Re: 1st Plug Chop with 48bbk. Thoughts?
It doesn't matter for operation (at least in street engine operation) but for you to know what side faces the exhaust port. Then the side that is colored will let us know what is happening in the cylinder during combustion.nitroelite419 wrote:which way exactaly should the plug face
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree