Jetting with Morley's Muscle Kit

[wilks]

Appreciate the explanation…..makes sense…thanks.

 

[Traumahawk]

My bike has the Morley kit, I was never able to get it to run right with the shorter DJ stage 7 spring.
I changed to the stock spring and was able to get it to run better. I have a Kerker 4 into 1. I also went to slides that I drilled to .125 in, on the lift hole. I use a Motion Pro needle and stock idle jets.. The PAJ 1 and 2 air jets are one size bigger. The bike will take throttle in 5 th gear at 1500 rpm with out issue. I usually get high 30's to low 40's mpg on the road,; I would like to hear of anyones experiences on how they determined how big to drill the slide lift holes and what there experiences were with changing from the short slide springs (DH stage 7) vs the longer stock springs. Regards

I went with a #19 drill bit size. Its what has been around for a long time in the DJ kits. Works well with the DJ stage 7 springs. Why did you drill your our bigger? Before I drilled my slides I read everything that I could on other forums. The general consensus was you could go shorter springs with a stock size air hole. If you drilled the slides, then you must go with the softer spring or other wise they would fight each other.

Have you ever been to a dyno? I'm curious what you AFR is? a larger PAJ1 would give you more air at idle, and a larger PAJ2 would give you more air just off idle thru the RPM range.

 

[wayne billings]

Hello trauma Hawk On my '86 the needles have only one clip setting, is this likely stock? I do not know the history of this bike. I am certain that many of us are breathing a sigh of relief knowing that you have picked up the torch from danny max, impossible shoes for many of us fill. Thanks and happy trails.

 

[Traumahawk]

Hello trauma Hawk On my '86 the needles have only one clip setting, is this likely stock? I do not know the history of this bike. I am certain that many of us are breathing a sigh of relief knowing that you have picked up the torch from danny max, impossible shoes for many of us fill. Thanks and happy trails.

They are probably stock. There are some stock needles that are adjustable, but those are VERY hard to find.

Thank you very much for the kind words.

Eric

 

[thunder]

There are a lot of variables when determining jetting. It doesn't seem to matter as much on a stock bike, because you are only changing 1 or 2 variables. With Sean's kit, your changing more. Altitude and float height, and aftermarket exhaust are the 3 main ones to look at. The higher the altitude the leaner the jetting you will need. The richer the float level, the leaner the jetting you will need, and aftermarket exhaust, the leaner your jetting will need to be.

I run 155s with Sean's kit. My float level is 17 mm, very lean, so I have to go richer on the jetting. 1 mm in float height equates to 1 jetting size difference. I am also at 1100 ft above sea level, so kind of a wash. I also have a kerker 4 to 1, so have to go leaner on the jetting. I know that at full throttle, my A/F is 13.6 to 1. Not bad. I run factory pro needles, and get over 40 mpg at 75 mph. My A/F screws are set 4 turns out in the front, and 4.5 turns out in the rear. Once the bike is warmed up, at idle My A/F is 13.2. I also use an innovate LM2 to get these numbers.

Think of it like this.....balance. If your leaner here, you have to go richer there, to balance things out. Make sense?

Hi Eric, I read in a carb tuning post that if the A/F setting is out more than 3 turns, it’s recommended to go up one size on the pilot jet to get a crisper throttle response. But with the fuel mileage you’re getting that’s impressive.

 

[Fire-medic]

There are some stock needles that are adjustable, but those are VERY hard to find.

Any Canadian members wish to say what their needles are? I thought their needles were adjustable.