Jetting help

[riderssb250x]

need a base line for jeting on a 400 im working on..
im in ri, temp is around 50-75 average,

bike has..
fmf powercore 4 exhaust
removed air lid,
stage 2 hotcam

just installed the cam and removed the lid need some jeting help its at stock now with the needle 4th clip down,

just lookin for opinions

[zrpilot]

Originally posted by riderssb250x
need a base line for jeting on a 400 im working on..
im in ri, temp is around 50-75 average,

bike has..
fmf powercore 4 exhaust
removed air lid,
stage 2 hotcam

just installed the cam and removed the lid need some jeting help its at stock now with the needle 4th clip down,

just lookin for opinions

What carb? 450R or stock?

[muad]

N/M, honda400ex2003 already helped me in another thread I started that I had forgot about, DOH!!

[RIDEREDson]

Does adjusting the needle holder and the locknut affect anything?

[flyboy1294]

Hey guys I think I might have a problem.

Disassembled my stock carb last night, checked my jet sizes (Note: I DID remove the jets...) and reinstalled everything today. But it won't start. It cranks and cranks and occasionally seems to almost fire, but then keeps turning. I am sure it has been primed.

I have no idea what I could've done wrong. I'm away from home at the moment, but I will tear it down on the weekend. But in the mean time, does anyone have any ideas of what I did wrong?

If not does anyone have a link to a good Carb schematic?

[zrpilot]

Originally posted by flyboy1294
Hey guys I think I might have a problem.

Disassembled my stock carb last night, checked my jet sizes (Note: I DID remove the jets...) and reinstalled everything today. But it won't start. It cranks and cranks and occasionally seems to almost fire, but then keeps turning. I am sure it has been primed.

I have no idea what I could've done wrong. I'm away from home at the moment, but I will tear it down on the weekend. But in the mean time, does anyone have any ideas of what I did wrong?

If not does anyone have a link to a good Carb schematic?

First loosen the float bowl drain screw to see if gas is in the the float bowl. IF so, it will run out the drain tube all over the ground. That is the first place to start.

Report back.

[flyboy1294]

Originally posted by zrpilot
First loosen the float bowl drain screw to see if gas is in the the float bowl. IF so, it will run out the drain tube all over the ground. That is the first place to start.

Report back.

Alright Will do.

[alberto]

I think my sons 01 might be running rich? Let me know what you think:

full YOSH, K&N, no lid, 170 main (dyno jet kit), dyno jet needle 3rd clip, 3 1/2 turns F/A, stock pilot.

it idles good, nice mid pulls hard, top end is somewhat sluggish. Pops on deceleration. Plug has some brownish dots and black dusting.

I think the bike runs fine but the kid thinks other wise. At this point its all about dialing it in right?

Let me know what you guys think. Your input is always valued.

[RIDEREDson]

Mine runs good and fires right up, but I feel like its bogging a little. Would that mean its rich or lean?

[zrpilot]

Originally posted by alberto
I think my sons 01 might be running rich? Let me know what you think:

full YOSH, K&N, no lid, 170 main (dyno jet kit), dyno jet needle 3rd clip, 3 1/2 turns F/A, stock pilot.

it idles good, nice mid pulls hard, top end is somewhat sluggish. Pops on deceleration. Plug has some brownish dots and black dusting.

I think the bike runs fine but the kid thinks other wise. At this point its all about dialing it in right?

Let me know what you guys think. Your input is always valued.

Sorry, I don't have practical expereince with Dynojet kits. Try this, drop the main down one jet at a time and see if the sluggishness goes away. Bump up to a big pilot and re-adjust the fuel screw.