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Tc88 fine tuning cv carb. (I know I need to see a dyno but I wanna play and see what I can do )

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Old 07-07-2021, 05:44 PM
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Default Tc88 fine tuning cv carb. (I know I need to see a dyno but I wanna play and see what I can do )



03 wide glide with cobra a/c, V&H 2-2 big radius, feuling reaper 525 cam and the carbs been over hauled with cv performanceparts, cut a coil off the spring, new needle, 46 and 190 jets and my air/fuel screw is 3 turns out. I know you can get a good basic idea off how your plugs look but I don't have that knowledge. The bike runs amazing right now. Any input would be nice if I need to richen or lean her out by the looks

of these plugs.
 

Last edited by Adamsfxdwg; 07-07-2021 at 05:47 PM.
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Old 07-07-2021, 06:10 PM
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Welcome to the Forum and congrats on your first post. Plugs look good to me
 
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Old 07-07-2021, 08:51 PM
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Originally Posted by Adamsfxdwg


03 wide glide with cobra a/c, V&H 2-2 big radius, feuling reaper 525 cam and the carbs been over hauled with cv performanceparts, cut a coil off the spring, new needle, 46 and 190 jets and my air/fuel screw is 3 turns out. I know you can get a good basic idea off how your plugs look but I don't have that knowledge. The bike runs amazing right now. Any input would be nice if I need to richen or lean her out by the looks

of these plugs.
You are running rich. Set the air screw to two turns instead of 3. If it doesn't buck or spit back through the carb you are good. If it spits back through the carb or doesn't have good throttle response turn it out 1/8 of a turn till it responds good and doesn't spit back. This is after the bike is up to temp not on a cold bike
 
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Old 07-09-2021, 08:18 AM
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Heat range looks good but base ring does indicate a rich condition but if mileage is reasonable, I might just run that way. It is difficult to tell where to adjust looking at plugs that show an overall condition; plug cuts are the best way to check rich/lean at idle, partial throttle and full throttle. How is the mileage? Try what Mr. Martin suggests but I am betting it is rich in the mid-range and a different needle to lean out the mid range will get jetting spot on. What needle are you running? Remember, make only one adjustment at a time.
 
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Old 07-15-2021, 03:14 AM
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Any progress in this thread? How did it turn out OP?
 
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Old 07-16-2021, 01:08 AM
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Those plugs look pretty old time for a treat get a new set. Heat range not too bad as you say she goes well. The old saying if it aint broke! Play if you like but one change at a time.
 
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