[nfpgasmask]

OK, so I have the Nitroheads Dragpipe installed (straight pipe) and a K&N filter. With the stock 128 jet, I could barely get the bike to start cold, and it would die on me when I gave fast throttle. I then went up to a 130 jet, and it started easier, but still wants to die when I give fast throttle. Then I went up to a 132.5 and it is much better, but when cold with the choke open, it will die when I give sudden throttle. But at least it starts right up. Do you experts think I should go up one or two more sizes for the main jet?



Thanks - Bart

 

[lizrdbrth]

The main has nothing to do with cold starting.



Reno+January= choke. Possibly for several minutes or miles. Opening up the idle mixture screw may help.



You're at 4,000 feet, where a stock bike would usually be perfectly happy with stock jetting. Upping the main will help compensate for the open exhaust and airfilter, but won't improve starting.

.

 

[nfpgasmask]

Yeah, its starting fine now, like right away. Its just that it wants to die right when I give throttle, but I think only when cold. Is it just a matter of letting it get warmed up?



Thanks - Bart

 

[671tdub]

mine wont start without full choke and wait few mins idle gets higher and then i push choke back in. cant throttle it till few mins warm up.