is this normal? bogging from low

[Penken]

hey i was ridin my superjet alot yesterday.
it´s a 650 superjet. coffman sizzler. k/n filter. bored abit. hooker impeller, worx intake grate.

when i´m ridin realy slow and pull the throttle all the way. it just sounds like it dies. then i pick up some speed and do the same thing and it works fine.

is this normal?
jetting problem?
maybe i have a to high pitch impeller? i have no idea on what pitch i have since the previous owner bought it. anyway to find out?

my sparkplugs are abit on the darker side. but it runs fine at wot.

 

[SuperJETT]

As long as there aren't other issues, it's probably your low speed carb tuning is too lean. Open the low screw 1/4 turn and see if that makes it better any.

 

[Penken]

As long as there aren't other issues, it's probably your low speed carb tuning is too lean. Open the low screw 1/4 turn and see if that makes it better any.

okay thanks.
will try that tomorrow

 

[SUPERTUNE]

Sounds like a carb issue. Could need rejetting or a possible rebuild. Like Sjett said...
Try turning out the low adjuster up to 1/2 turn and bump up the idle screw about an 1/8 turn.

 

[Penken]

Sounds like a carb issue. Could need rejetting or a possible rebuild. Like Sjett said...
Try turning out the low adjuster up to 1/2 turn and bump up the idle screw about an 1/8 turn.

thanks for the tips.
which screw is lowspeed and which is highspeed? stock SN 650 carb.
sorry for the newbie questions

 

[smoofers]

I can't remember which is on what side. If you take a flashlight and a mirror, they are labeled "H" and "L".

 

[SuperJETT]

Bottom is low, top is high.

 

[tipafew]

Sounds like a carb issue. Could need rejetting or a possible rebuild. Like Sjett said...
Try turning out the low adjuster up to 1/2 turn and bump up the idle screw about an 1/8 turn.

Listen to this guy!

 

[tipafew]

Dang Darin, everytime I see one of my own posts I remember that I need to get you to switch my screen name!