But did you go full throttle on a hot engine, throttle off, then spark OFF, and glide to a stop (no idle)? Cool engine, pull plug.
Reading The Plugs
- Thread starter CPC
- Start date
CPC
Member
dont think so except ride @ full throttle
Mountainman
Active Member
maybe 25-30:1 after break in ???
seems that for 20:1 -- your plug looks darn good
when the time comes for a leaner mixture
there is a thread called -- peferred 2-stroke mixture is ???
something like that anyway
it's a poll
just up top the mountain here
I keep them always a touch rich -- 25-30:1 after break in period
some wish to go super super lean -- I don't know why ???
ride that thing sideways
seems that for 20:1 -- your plug looks darn good
when the time comes for a leaner mixture
there is a thread called -- peferred 2-stroke mixture is ???
something like that anyway
it's a poll
just up top the mountain here
I keep them always a touch rich -- 25-30:1 after break in period
some wish to go super super lean -- I don't know why ???
ride that thing sideways
CPC
Member
Just got back from a delivery, WOW runs like a champ now! 
Anyways am having the plug sandblasted tommorow, then we can read the plug from the start. Also, just mixed a freash gallon og 20:1 lastnight, for the next gallon or 5 I think im going to go with 24:1 simply to be on the safe side, then down to 28:1 for another 5 gal, and will prolly not go any leaner, since I do tend to ride wide open, and just cant afford a failure at this point in time.....
Anyways am having the plug sandblasted tommorow, then we can read the plug from the start. Also, just mixed a freash gallon og 20:1 lastnight, for the next gallon or 5 I think im going to go with 24:1 simply to be on the safe side, then down to 28:1 for another 5 gal, and will prolly not go any leaner, since I do tend to ride wide open, and just cant afford a failure at this point in time.....CPC
Member
I pulled the plug on Forbisher's advice, he's giving me all sorts, and alls been real sound advice! Thanks Forbisher
G
Ghost0
Guest
I agree your fuel/air mixture looks about perfect, might try going to 30:1 on the oil which will reduce the carbon build up. I would not recommend sandblasting your plug though. Has a great potential to do more harm than good. I would just replace the plug after changing your fuel/oil mix.
B
BSA
Guest
Dont forget use the right heat range!!!!!
Otherwise reading the spark plug is a waste of time.
NGK B5hs is appropriate for areas with ambient temps below 100 farenheit. Over that use B6HS.
BSA
Otherwise reading the spark plug is a waste of time.
NGK B5hs is appropriate for areas with ambient temps below 100 farenheit. Over that use B6HS.
BSA
CPC
Member
then I need both plugs! I live in a semi desert area, even in the hottest months, it can be 70 when you leave home, and 2 hours later 110, let alone rode temps over 150!
MotorBicycleRacing
Well-Known Member
NGK B5HS Spark Plug
use in ambient temperatures of 40 to 80°F.
NGK B6HS Spark Plug
use in ambient temperatures of 80 to 110°F +.
It really isn't that sensitive.....and I live in a similar climate
I prefer to use the DENSO W20FP-U which is an equivalent of NGK BP6HS
Caution: They are extended tip plugs that protrude into the combustion chamber
so check the piston to plug distance
but they have fit all the 66 cc motors I have seen and SHOULD fit on most 50 cc too
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CPC
Member
thats what im using as we speak
