4 wheeler atv action did a test on the dial-a-jet in the march issue. they used a 400ex.

 

Clark389 wrote: There must be a dealer somewhere with a 145.... the 148 might be a little rich, but won't hurt anything.

Cueball89, the "DJ" Alltoys was referring to is Dyno Jet, not Dial-a-Jet.

Alltoys - would you recommend the Dial-a-Jet for a machine doesn't get operated at different elevations? I'm always below 1000 feet, except when I'm in VT, then it's 2000-3000 feet.

 

Novakaw650,
I like my dial a jets for the reason I can get any number of combinations when modding or just playing around. By turning a notch on the jet, opening or closing a vent can produce a half number size on the jets. Better for fine tuning your machine. I am always messing around with different modds people post on the forum to see if what they are saying actually works. The dial a jets allows for me at least to change my jetting without having to tear into the carbs every day or once a week. They also allow me to adjust for cold temperatures or warm temperatures at a flick of flitch so to speek. Now that I have them I wouldn't go back not at all. Another advantage to dial a jets and Shotgun does this also for pulling. I have a valve that switchs from the carb fuel to a race fuel mixture that is compatable for super charging, turgo charging or now for ice racing. A one gallon fuel additive will last long enough for a race and gives an extra boost.

Basically I can set my jets for normal runing, for ice racing, for extra jam when I use the super charger with a just a flick of switch. For me this is a definate advantage because I don't have to tear my carbs apart every time I want to do something different.

Now for you or any person who wants to modd their quad. The dial a jets are progressive jet and work on the harmonics of the carb. They only give what the carb can handle and that is what you want. Most dial a jets give a full shot of fuel when you punch it they come on at 3/4 throttle with a punch. This is okay when you are 1/4 mile racing but so good when you don't need it especially on a tight trail or trying to get out of the mud hole. One more thing and probably the most important is TPI's dial a jets are the only one that will work on a down draft carb such as ours on the 650. Are they worth the price, well at least for me I think so only for the reasons I have listed you have to justify the exspense for yourself.

 

I have now drilled the pipe pute the 142,148 combo back in and the stock needles with two washers each. I also closesd the fuel screw to about 21/2 on each carb. This combo didn't work as well as the DJ 134,138 and needle in the 5th position. I read Nyroc is using stock jets with DJ needles. I did clime Patton hill at the yuma dunes the past weekend but a stock Honda rincon 650 was able to clime a taller part of the hill, about 30' higher and I could not do it. This jetting problem sucks! Does anyone have a guess on what I should do.

Thanks Clark

 

Get the 145 to replace the 148. Do a plug color check. Is it having mid-range problems? If so, do you know how thick the 2 washers were? Kawi mechanics were using .04 of an inch total to richen stock 650's with cold weather problems. I've got .07 in thickness with my mods. I've got 145-148 mains in mine. What elevation are you at? Sorry for all the ?

 

I am at 1000ft and the dunes that I road in this past weekend are about sea level. I used the DJ washers that came in the kit. The quad is weak of the start and not real strong in the mid either. You think I should drop the 148 for the 145 or go up to a 145 for the 142. You are using the 145-148 combo correct?

Thanks Clark

 

You really need to do a plug check.

 

Does anyone have an 03 P 650 that they have done the DG snorkel and NYROCK pipe mod. If so what are you using for the Jets. I spoke with a manager at DJ his name is Mike Corry. He was the only one at DJ to listen to me. He went out and got an 03 for testing and found out the stock air box on the 03 had been changed by Kawi to breath more air. So he came up with a new kit for the 03. this kit was much better except for the Quarter throttle position where it was way too rich. dropping the needle at 1000 ft 1 clip position higer helped a lot but at 7200ft the needle had to be dropped again two more positions as well as going down a couple of sizes on the main jets and the P didn't run well at all. I spoke with mike at DJ again and he is sending me a leaner needle but not as lean as the 02 kit. Has any one jetted an 03 with the Keihin Jets.

 

I have now switched to Nyrock's jetting DJ needles with the clip in the 5th position and stock jets 138-142. I have a DG snorkel and twin air filter. I have gone back to a stock muffler for noise reasons. This combination works very well in phoenix at 1000 ft. and 110 degrees F. I still have a slight problem at 7400ft in the 1/4 throttle crusing at 26-35 mph. It is running to rich at a 1/4 throttle but I don't want to change the needles every other weekend. can I just go down on the main jet size without changing the needle to the 4th position?

Thanks Clark

NovaKaw650: I used two of the DJ washers on each of the stock Kawie needles when when I had the stockers in.

After speeking with DJ again they clain their jet sizes would be almost identical in performance to the Keihin. So if you use a 138-142 in Kehin you would use a 138-142 in DJ. This is per Mike Cory at DJ. He said even though the hole sizes in the jets are different like sizes perform almost the same. You might have to go down 1 size in DJ.