Backfire on decel

[QuadRacer28]

Finally got around to installing my FCI intake today but now I'm having some serious backfire or "popping" on deceleration. I've used a JD jet kit from the beginning and switched to the red needle and a 190 main. From what I understand the main jet determines 3/4 to full throttle settings so is it getting too much fuel now? Any help would be appreciated.

[Monsterron]

I have the same problem. I even welded the exaust flange and head pipes together to fix leaks and i still shoot some flame out on decel.
I had dave hopkins do the carb and port the head. I too have the fci intake. I am thinking its something in the air fuel mix. But not sure yet.

[Fast64ranchero]

Your way rich, 190 main jet is way to big

[ktmbill]

Way to rich get rid of the jd jet kit get a HRC honda 06 thats the needle you need 168 main 45 pilot 4th clip from the top on the needle 13/4 out on the fuel screw if its a stock motor can go to a 160 main

[QuadRacer28]

Thanks guys. I thought the 190 was big but I had a 185 in there from when it was dyno-tuned? If I continue to use the JD kit or go back to a stock 175 will that be ok? The red needle is for high temp/high altitude where the blue is for low temps/low altitude. Living in Phoenix it's generally on the warm side (red needle) but I ride between 1000-2000 feet elevation (blue needle). My motor is stock internally with the FCI intake and Motoworks full system. What should I do?

[sticko2]

Bill has told you exactly what needle and jets are required.

[Fast64ranchero]

Buy the HRC kit, and a 45 pilot jet, use the HRC needle on the 2-3 clip down, use the 168 main jet, set the fuel screw @1.75 turns out. save the leak jet incase you ever want to add it later

[ktmbill]

Send the carb to Fast64ranchero and it will be fixed and jetted for you

[Deadman]

HRC needle is soooo much better than the JD Red needle.........

[QuadRacer28]

HRC needle is soooo much better than the JD Red needle.........

Can anyone give me the part number off of the HRC needle? My local dealer cannot just order the jet kit by itself so I need to order the individual pieces ... thanks!

[ktmbill]

here is the part number 16020-NLZ-610 I order this kit and the honda dealer has no problem

[QuadRacer28]

here is the part number 16020-NLZ-610 I order this kit and the honda dealer has no problem

Ordered up this kit from my Honda dealer locally, should be in in a few days so I can play with the carb again

[FuriousYachtsman]

Send the carb to Fast64ranchero and it will be fixed and jetted for you

What's this cost?

[ktmbill]

They are around $31.00

[FuriousYachtsman]

They are around $31.00

I mean for fastranchero to "fix" it. Assuming I can figure out how to remove the carb without too much trouble.

[sticko2]

I mean for fastranchero to "fix" it. Assuming I can figure out how to remove the carb without too much trouble.

i think around $140 but dont quote me on that.

[Fast64ranchero]

That guy charges $125 and that includes the mods, jetting, cleaning, inspecting, return insured priority shipping.

[eagertorace]

Way to rich get rid of the jd jet kit get a HRC honda 06 thats the needle you need 168 main 45 pilot 4th clip from the top on the needle 13/4 out on the fuel screw if its a stock motor can go to a 160 main

I have this on my bike with stock main jet....I still have a slight pop on decel...I always thought it would be in the pilot jet?...too big of main jet will make one pop?