HMF Jetting and Needle Set

[HondaRacing23]

I talked to C And D Racing and they told me to set the Needle clip on the third position and run about a 170 main. HMF told me and gave me a 180 main and told me to put the clip on the 2nd position. what should i do anyone have the hMF full system if u do whats your jetting at. im in Ohio

[cals400ex]

i say both are too big on the main, but is just me. a little leaner will give the bike more power. what needle are you running?? stock or aftermarket?? whats the temp outside and what elevation are you at?

[HondaRacing23]

i am running stock needle. below 3000 feet and its like 7 degrees now but its usuallu 30. it would be a heat wave if it hit 35 degrees. :ermm: :ermm: :ermm: :D :D :D

[cals400ex]

on a built 426 in the really cold months with the airbox lid off, a 170 should be ok. however, i would probally run a little smaller. if you have the lid on, i would run a 165 at largest.

[HondaRacing23]

i am running a 180 now and it seems to be running just fine...:confused: :confused:

[cals400ex]

Originally posted by HondaRacing23
i am running a 180 now and it seems to be running just fine...:confused: :confused:


it probally will run just fine. however, it will be quicker with a smaller jet in. bigger doens't mean better when jetting always. also, the mainjet only controls the fuel from approximately 3/4 to full throttle. good luck

[northeast400]

I run a 170 dynojet main

[HondaRacing23]

did u have problems installing your headpipe. u know how the headpipe connectors that go into the head then u have to connect the headpipe did u have prob with air leakage. did u put them on before u installed the head or all in one peice