Originally Posted by
grizz1
You probably have a carb with the long LSN. These tune a little different to most carbs out there. Set the HSN at .5 of a turn in from flush and the LSN at 2.5 turns in from flush. This should be pretty close. Don't touch the HSN again, just tune in from here with the LSN. If you go any leaner on the HSN you will get lean bog at the top end or when the tank gets down. Set like this the motor will perform flawlessly, but if you prefer a more "normal" tune on your motor, then grind down the LSN as Rex suggests. It works very well, and allows you to tune with the HSN as per any other motor. You will end up with HSN at about 2.5 - 3 turns in from flush and the LSN about the same as before, maybe a little leaner - around 2.5 - 3.5 turns in from flush (depending on pipe, fuel etc). Let us know how you get on
Hi, could you tell me how much exactly would I have to cutoff of the LSN ?
Do I just cut it with a Dremel cutoff wheel and then use a sanding disk or drum to round it ?
Also does anyone know if any other manufacturer LSN will fit on my GO 5PT carb ?
I used the method described obove to tune it and so far so good I haven't really tested it on the track yet, but I still felt more comfortable when I used my old sirio carb & reguler short LSN for tuning.
My setting is this so far :
HSN= .250 (1/4) turn in from flush
LSN= 1.75 (1 3/4) turn in from flush
at 2.5 in from flush on the LSN it would bog for an instance when I hit the throttle, at 1.75 feels good.