Problem with after market driven pulley on trail master

[bob58o]

When the throttle closes from open you still are turning high rpm with with a closed throttle. Fuel is coming from the pilot jet. When it is too lean, it doesn’t burn in the chamber… it exhausts out and burns in the exhaust pipe… needs fatter pilot jet. Unburned fuel is sent out the exhaust because the mixture is too lean when closing the throttle at a “high” rpm. Because the pilot jet is too small, the mixture is lean, the mixture doesn’t burn right in the combustion chamber, then it goes out the exhaust - mixes with fresh air - hits the hot steel - and ignites.

 

[bob58o]

I just don’t like repeating myself 4 times.

Aftermarket air filters and exhausts require larger jetting. I told you a 0.019” or so was required. I asked AI to tell you and it said 0.020” was required. I explained how the fuel screw setting shows the jet is too small. I explained how a lean condition caused by a pilot jet that is too small causes after fires in the exhaust.

You are insulting. Last time you begged for my help again in a message. Look a gift horse in the mouth and the donkey is likely to kick you in the nuts.

 

[Ryanhodge2715]

Gonna order them soon as I can an take your word. I can see the pilot jet helping it not cut off but still don't see how it will help my spudder that I only experience in my high end. Gonna order a new start coil when I get the jets to eliminate that as well

 

[Ryanhodge2715]

I'm hitting 34 when it's going good. Max I've got an tuned it to where it does not cut off when letting off the throttle i road a good 15 20 min up an down the road but I'm definitely thinking lack of fuel in the bowl. When I start shuddering I'm able to choke it an stop the spudder. Like it gets less fuel so me choking helps i stop for 30 seconds an go again an I'm good.

 

[Whitetrashrocker]

You might be getting valve float.
My 250cc shifter, geared 2.3:1 with 18" tires is only getting to 37mph.
Could the shudder your feeling be from something else? Tire shimmy?

 

[Ryanhodge2715]

Well my phone constantly spell checkes (spudder) to be shuddering. It's definitely the engine dying out in high rpms. I've never been around or seen a upgraded motor I probably should've watched a video on that to see if it's similar. The intake did come with springs but there are like 22 or 26 lb springs i think. Bob said probably to much need like 18 I think.

 

[Ryanhodge2715]

Side note I am get a ton of blow back off my head filter it's almost clogged after little test running of done past week or so