KX Riders

Maintenance & Technical => KX500 Aluminum Frame Conversion (AFC) => Topic started by: shooky on March 12, 2015, 02:09:27 PM

Title: 450 carb on 500af
Post by: shooky on March 12, 2015, 02:09:27 PM

Anyone running 450f carb on 500af? Just got it. Not sure how to adjust carb. Runs way rich. 32:1 mix. Fouled two spark plugs. Any ideas?

Title: Re: 450 carb on 500af
Post by: Mike Grant on March 12, 2015, 02:31:06 PM

The accelerator pump is dumping fuel into the motor every time you crack the throttle......Sell the FCR and buy a PWK carb

Title: Re: 450 carb on 500af
Post by: shooky on March 12, 2015, 02:41:48 PM

Thanks for the reply. Is it possible to make the current carb work?

Title: Re: 450 carb on 500af
Post by: Motorrad on March 12, 2015, 04:10:53 PM

Quote from: shooky on March 12, 2015, 02:41:48 PM

Thanks for the reply. Is it possible to make the current carb work?

No

Title: Re: 450 carb on 500af
Post by: don46 on March 12, 2015, 11:57:11 PM

Work is one thing, work right another, you could maybe remove the rod on the acc pump and work with jetting and make it work, the question is why. You can get a carb for a few hundred, or even a 250 carb and bore it to a 40mm

Title: Re: 450 carb on 500af
Post by: shooky on March 13, 2015, 01:25:15 PM

Switching carbs. Thx for info.

Title: Re: 450 carb on 500af
Post by: sandblaster on March 13, 2015, 05:10:56 PM

Riding elevation 1000 ft or less
PWK 39 stock carb
55 pilot
168 main
clip on the third (Middle) position
approx 1.5 on the screw.