[cgrady88]

I had a hmf slip on with a uni-filter on a my bike and just recently put a sparks full exhaust on. It had 165 main and 42 pilot for the hmf. Got the sparks jet kit which comes with a 155,152 main 45 pilot. Put the 155 and the 45 in and the bike will not stay running will not idle runs like crap. So I put the 165 and the 42 back in. Still dont idle right and and when i rev up it pops and stuff. Do i need to go up a jet. Why is sparks recommending a small jet than a hmf slipon?

 

[TRX2fiveO]

165/42 should be about right, you might want to check to make sure your air filter is clean and also the choke levers on the 400 carbs have a tendancy to wear the clipping mechanism and vibration actually will cause the lever to engauge to the first notch. check that too.

 

[cgrady88]

it wont even start with choke down..Have to choke to start and when i take chole off have to give it gas to stay running also when i took main jet out i think i turn the nut on the jet/needle holder and really dont know where it was if that even matters

 

[Redracer]

What elevation are you at? You definitely need to add more fuel, that Sparks system is letting A LOT more air through than your HMF slip on

 

[cgrady88]

im in eastern NC.......38 ft above sea level or something like that.........go up to 170 leave 42 pilot in?needle valve adjustment, fuel/air mix screw adjust?

 

[TRX2fiveO]

Where in NC are you? I live on the east coast if your close you can bring it to me and I will fix it for you

 

[cgrady88]

goldsboro nc....where u at

 

[TRX2fiveO]

Elizabeth City.... We go to Busco I love that place.