EVO All Evo Model Discussion

Rear cylinder richer

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Old 07-09-2018, 09:19 AM
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Default Rear cylinder richer


Dialing in the new top ends and it seems to be tuned pretty good except that when pulling plugs to check, the rear cylinder is slightly darker, I understand that it is normal.
 
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Old 07-09-2018, 09:30 AM
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Yup, that's why you put the wideband in the front cylinders exhaust tube.
 
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Old 07-09-2018, 09:27 PM
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Both plugs are a lil rich, just turn the lean screw a tad
 
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Old 07-09-2018, 09:44 PM
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Originally Posted by aces&8s
Both plugs are a lil rich, just turn the lean screw a tad
That would only fix his idle circuit-
We don't know at what load or RPM he took the plug check at, and I am betting this just confused you and most everyone else.
Everyone that wants to know what their AFR is must put in a wideband unit.
Or, you are just guessing.........and more guessing.
 
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Old 07-09-2018, 09:59 PM
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Originally Posted by Kingglide549
That would only fix his idle circuit-
We don't know at what load or RPM he took the plug check at, and I am betting this just confused you and most everyone else.
Everyone that wants to know what their AFR is must put in a wideband unit.
Or, you are just guessing.........and more guessing.
No confusion here. Most folks arnt going to install an AFR unit.
 
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Old 07-09-2018, 10:01 PM
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[QUOTE=aces&8s;17500127]No confusion here. Most folks arnt going to install an AFR unit.[/QUOTE
Why not?
It is the best tool in the box!
Plus they affordable.
 
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Old 07-09-2018, 10:04 PM
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[QUOTE=Kingglide549;17500131]
Originally Posted by aces&8s
No confusion here. Most folks arnt going to install an AFR unit.[/QUOTE
Why not?
It is the best tool in the box!
Plus they affordable.
Agreed they are the best tool for the job. Don't know about affordable. Cut and weld a bung in front exhaust ect, ect,
 
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Old 07-09-2018, 10:10 PM
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[quote=aces&8s;17500144]
Originally Posted by Kingglide549

Agreed they are the best tool for the job. Don't know about affordable. Cut and weld a bung in front exhaust ect, ect,
Amazon Amazon
People pay more for the bolted on chrome BS.
The AFR will save you hours and days of screwing around.
To weld a bung in is a 5 min job. If you dont weld, just take the pipe to any muffler shop that has a wire feed.
Use a 1/2 inch hole saw to cut the hole front pipe backside.
A piece of cake job all in all.
 
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Old 07-09-2018, 10:22 PM
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[QUOTE=Kingglide549;17500163]
Originally Posted by aces&8s
https://www.amazon.com/AEM-30-4110-U.../dp/B00N3VGPYS
People pay more for the bolted on chrome BS.
The AFR will save you hours and days of screwing around.
To weld a bung in is a 5 min job. If you dont weld, just take the pipe to any muffler shop that has a wire feed.
Use a 1/2 inch hole saw to cut the hole front pipe backside.
A piece of cake job all in all.
All the pieces to put it together looks like about $300 and then chasing the perfect numbers tweaking it for a week. I wonder about that sensor blocking exhaust flow. Just thinking out loud.
 
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Old 07-09-2018, 10:27 PM
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My bike runs very well.
i am not going to give you a list of all I have done to it, but it is a long one.
This year I am trying 50 deg valve seats.
Raised ports.
With a carb and high CR numbers, its is a piece of mind.
You don't need purrfect numbers, just ballpark for your situation.
Purrrfect is for F.I,
Most everyone knows HD engines do not like lean numbers. They run hotter an hell.
 


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