ok enough of you are saying that it is jetting to make me believe so does anybody know where i can get a 39pwk keihin carb and can i use my stock throttle cable if not where do i get the correct one and how do i make up for the gap between the carb and the airbox hose.

I just don't understand how my pilot can give me that much air to compress and why it will only happen when the engine is hot but if i knew then i wouldn't need your guys help

The feedback is great thanks alot everyone so far and please keep it comin

 

www.MOTO-MAN.COM has the best prices and the carb comes jetted pretty close to what you will need.

 

You are lean,
the oem carbs jetting was way off in 88

allcool

 

alright i am going to buy a 39pwk keihin carb and see how that works hopefully it does i will keep you guys posted but, still if anyone has anymore ideas from now till then please let me know thanks alot to everyone who has help i will not forget the kindness you have showed me

 

alright i have now bough a keihin 39mm pwk carb from moto man which i do not reccomend buying from they have forgotten my throttle cable and they do not know the standard jetting for an 88lt500. Now you know all about my quad i have 2 questions what is a good starting point for my jetting and how am i going to extend the airbox hose to meet up with the new keihin please if anyone has an idea i am running on sea level and might as well tune it for the winter seeing as how it is coming soon thanks alot hope to hear from you all soon

 

they dont come with throttle cables becasue your stock one will work with it fine. there carb should be very close on the jetting, if your running 32:1 mixture ?

 

it does take a different cable from stock . a good starting point is 175 main and a 52 piolet . i am at 1001 ft and i am running a 185 main and a 53 piolet . the first should be a decent start for you .

 

there are only 2 cables that will fit that carb, one for a twist throttle and one for the thumb, the stock cable or any repacemet cable will work, i have that carb on my lt and i didnt get a cable with mine and i used the one on it that was hooked up to my stock mikuni carb, if you bought the carb set up for the zilla like i said it should be dialed in prety close, there designed to work with a aftermarket pipe, scilencer and intake set up.

 

no a stock lt500 cable will not work with a pwk khien . it wont let the slide close all the way . the cable needs to be 1 " longer . humm i have tried a stock cable on mine when i got my pwk and it wont fit period . thats why they make a cable for it .

 

i will try to hook up the stock cable and see if it works but nevertheless the ad said it came with a new throttle cable that will hook directly up to my factory thumb throttle but we will see

thanks for the jetting tips i will start with that and work my way richer or leaner

Just does anybody know what i need to hook the keihin up to my factory air box do i need a reed spacer or some type of hose extension.

Also one other question i rebuilt my 87 lt 250 the piston was about two sizes too small and now i am running very rich and have horrible top end i am going to go down to a 220 main from a 240 should i also mess with the jet needle

Thanks alot guys you have been great