calling all magnacharger gurus

[rdunbar123]

Rather than extnd an existing post, i'll start over. I have finally got my blower after 2 repairs for leaking and it is ok. Bill was very cooperative. I installed a larger air filter like Dan, have not changed  any thing on the carbs and sill if i am at 1/4 throttle or more and quickly bury the throttle, the bike stutters like it is stalling. I am going to play with the needle this weekend, but I really wonder if the belt slips when  I stand on the throttle.  How have you guys adjusted the tension on the belt? how much play should there be at the mid point. Thanks for the help.

[dreamaker]

It has been a while, you are going to have to recall.  OK what jets, needles and setting do you have.

Dan

[fstsix]

I use a 1 1/8 open end wrench and insert it on the spacer behind the belt tensioner  and push it as hard as you can, i actually have a turn buckle i jigged up so i don't have to push so hard with my hand, it should be real tight!!.....Now that Hesitation should come out with a 27.5 slow jet. But you will have to exhaust all your efforts before you change that Slow jet   

[dreamaker]

If I am repeating myself sorry. What I got is 27.5 slow jet, the 97 needle that came with the kit and the 175 main that also came with the kit. The 97 needle that came with the kit is modified and is not even close to a stock 97 needle. Also I was told that the 175 main jet that came with the  kit is drilled, I think they said equal to 210 main. I am using the larger air filter with the S-tube and the carb. it is turned out two turns.  Now with all this I have no lag at all and I have to feather the clutch so it doesn't leap out.  And the only time it stumbles for me is first gear if I hit the rev limiter. Hope this helps, don't know what would be different.

Dan

[rdunbar123]

Dan,
It sounds like our only real difference is the slow jetwhich I have ordered a 27.5 and just got in. Also  did you change the position of your needle? up or down?

[rdunbar123]

If I am repeating myself sorry. What I got is 27.5 slow jet, the 97 needle that came with the kit and the 175 main that also came with the kit. The 97 needle that came with the kit is modified and is not even close to a stock 97 needle. Also I was told that the 175 main jet that came with the  kit is drilled, I think they said equal to 210 main. I am using the larger air filter with the S-tube and the carb. it is turned out two turns.  Now with all this I have no lag at all and I have to feather the clutch so it doesn't leap out.  And the only time it stumbles for me is first gear if I hit the rev limiter. Hope this helps, don't know what would be different.

Dan

Dan,
Re-reading your post, what i called hesitation is almost exactly like hitting a rev limiter. Everyone is sayying  that a 27.5 slow jet will  help so i wil go ahead and change it. Has anyone messed with the accel pump? I thought the    slow jet only affected up to 1/8 throtle?

[fstsix]

The Slow jet will be in play almost all the way to 3/4 throttle, 90% of your riding you will be in the slow jet circuit, I stepped up 1 size on the pump nozzle, but it did not help that Cough that you describe, Here is a chart to show that the slow Jet is Active all the way through the Throttle position. look @ figure # 7 http://www.iwt.com.au/mikunicarb.htm "Pilot Jet is the slow jet"

[dreamaker]

Dan,
It sounds like our only real difference is the slow jetwhich I have ordered a 27.5 and just got in. Also  did you change the position of your needle? up or down?

First off just for your info, I don't recall who it was but they said they bought there Mukuni parts  (jets) at the local Harley dealer. I don't know what the deal is but it seems that getting Mikuni parts online is like pulling teeth and a pain in the butt Or maybe I am a jerk magnet.  
The setting on my needle is on the third slot from the bottom. Look close at the needle pic. the top needle is a #97 needle for a 42mm.  The center is a stock #97 needle for the 45mm and the bottom is the modified #97 needle  that comes with the kit for the 45mm. Ignore the slight arc top and bottom, that is due to the curve of the lens.  But look at point where the taper starts on all the needles specially the modified needle. Big difference with the modified needle. Save the pic then you can zoom in on it.
Also when I put the 27.5 in the carb it is very noticeable.

Dan

[Murdoc]

I'm getting the same stutter, but I figured it was because I am running the bowl dry at WOT.  I did something a little different with fuel delivery and I may have kicked myself in the head with it.     It runs fine if you don't push it too hard.  I went ahead and ordered the NOS low pressure fuel pump and a Mr. Gasket 1-6# regulator from Summit just to rule out fuel delivery problems.  I'm not pushing the bike hard right now as I don't want to burn pistons or valves. 

Another observation is with the Hobbs switch activated, it really bogs down.  I'm not sure if that is what is supposed to happen or if I have a problem with the dyna?  Maybe I have it set at too low of a pressure, but I have not figured out yet how to determine at what pressure the switch kicks in.  I think I would need some kind of pressure gauge that accurately reads at low pressure so if anyone has any ideas on how to get an accurate reading. I would appreciate it. 

I am at Shanty Creek at Inzane and would love to talk to the folks that have installed their rev 3 superchargers successfully and what all they had to do to get them to run right..

[fstsix]

If I am repeating myself sorry. What I got is 27.5 slow jet, the 97 needle that came with the kit and the 175 main that also came with the kit. The 97 needle that came with the kit is modified and is not even close to a stock 97 needle. Also I was told that the 175 main jet that came with the  kit is drilled, I think they said equal to 210 main. I am using the larger air filter with the S-tube and the carb. it is turned out two turns.  Now with all this I have no lag at all and I have to feather the clutch so it doesn't leap out.  And the only time it stumbles for me is first gear if I hit the rev limiter. Hope this helps, don't know what would be different.

Dan

Sounds like you just about worked out the bugs, It only stumbles when you hit the Limiter LOL! I was talking to Lamont about this years ago and he said the same thing, Reset the limiter to 8000 rpm, the motor comes on so fast and strong you just can seem to shift fast enough, that extra 1000 rpm helps get through the gears without the limiter kicking in 

[fstsix]

I'm getting the same stutter, but I figured it was because I am running the bowl dry at WOT.  I did something a little different with fuel delivery and I may have kicked myself in the head with it.     It runs fine if you don't push it too hard.  I went ahead and ordered the NOS low pressure fuel pump and a Mr. Gasket 1-6# regulator from Summit just to rule out fuel delivery problems.  I'm not pushing the bike hard right now as I don't want to burn pistons or valves. 

Another observation is with the Hobbs switch activated, it really bogs down.  I'm not sure if that is what is supposed to happen or if I have a problem with the dyna?  Maybe I have it set at too low of a pressure, but I have not figured out yet how to determine at what pressure the switch kicks in.  I think I would need some kind of pressure gauge that accurately reads at low pressure so if anyone has any ideas on how to get an accurate reading. I would appreciate it. 

I am at Shanty Creek at Inzane and would love to talk to the folks that have installed their rev 3 superchargers successfully and what all they had to do to get them to run right..

If you have the fuel regulator with the Dial on it, that could be part of the problem, My daughter just had her Jeep rebuilt last year and had put one of those regulators on, she has a Clifford aluminum manifold with a 2 barrel Weber and it was surging on the freeway, we removed it a and it was fine, I wish i could join everyone at Inzane but had to go to Florida last week for family matters, Maybe next year if they do it...have a good time and a ride safe,,show them boys how to do a Burnout 

[rdunbar123]

I'm getting the same stutter, but I figured it was because I am running the bowl dry at WOT.  I did something a little different with fuel delivery and I may have kicked myself in the head with it.     It runs fine if you don't push it too hard.  I went ahead and ordered the NOS low pressure fuel pump and a Mr. Gasket 1-6# regulator from Summit just to rule out fuel delivery problems.  I'm not pushing the bike hard right now as I don't want to burn pistons or valves. 

Another observation is with the Hobbs switch activated, it really bogs down.  I'm not sure if that is what is supposed to happen or if I have a problem with the dyna?  Maybe I have it set at too low of a pressure, but I have not figured out yet how to determine at what pressure the switch kicks in.  I think I would need some kind of pressure gauge that accurately reads at low pressure so if anyone has any ideas on how to get an accurate reading. I would appreciate it. 

I am at Shanty Creek at Inzane and would love to talk to the folks that have installed their rev 3 superchargers successfully and what all they had to do to get them to run right..

I wonder if a barbed connector I put in the line between my pingle and the carb could be restrictin flow? I also may try shortening the line

[Jeff K]

Another observation is with the Hobbs switch activated, it really bogs down.  I'm not sure if that is what is supposed to happen or if I have a problem with the dyna?  Maybe I have it set at too low of a pressure, but I have not figured out yet how to determine at what pressure the switch kicks in.  I think I would need some kind of pressure gauge that accurately reads at low pressure so if anyone has any ideas on how to get an accurate reading. I would appreciate it. 

There should be no bog when the switch kicks in. What is your retard set at? I had mine set for 5 degrees. I used my Mighty Vac to set the switch, it has the ability to pump and suck so I used it to set the switch at 2# of boost

[rdunbar123]

If I am repeating myself sorry. What I got is 27.5 slow jet, the 97 needle that came with the kit and the 175 main that also came with the kit. The 97 needle that came with the kit is modified and is not even close to a stock 97 needle. Also I was told that the 175 main jet that came with the  kit is drilled, I think they said equal to 210 main. I am using the larger air filter with the S-tube and the carb. it is turned out two turns.  Now with all this I have no lag at all and I have to feather the clutch so it doesn't leap out.  And the only time it stumbles for me is first gear if I hit the rev limiter. Hope this helps, don't know what would be different.

Dan

Sounds like you just about worked out the bugs, It only stumbles when you hit the Limiter LOL! I was talking to Lamont about this years ago and he said the same thing, Reset the limiter to 8000 rpm, the motor comes on so fast and strong you just can seem to shift fast enough, that extra 1000 rpm helps get through the gears without the limiter kicking in 

Dan
Itlooks like thisweekend i will do thesame as you did. 27.5 slow jet and put my stock needle the same. Like you I have a larger air  filter with a home made piece to  the carb. I had put a fuel line on that may have been too long. I just shortended it and a lot of the stumble is gone, It seems the neck on the air filter forces the fuel line to be longer. I have a pingle  vlave so I did not expect a delivery problem.

[Murdoc]

Well, like the n00b I am with this, I didn't realize you actually have to set the amount of retard, but with Ernie Schuster's help, I set it to 5 degrees.  The Dyna I bought had no instructions so I looked them up on the net and figured out how to program it.  By default it retards 10 degrees, so no wonder it was bogging down!  It is much better now with it set to 5 degrees.  Thanks Jeff!  I'll see if I can find a mighty vac with both a pressure and vacuum gauge on it.

I still have to figure out why it is stuttering at WOT though and it feels like it is running out of gas.  I ordered one of the NOS fuel pumps and a regulator that I'm going to try when I get home from IZ next week.  I'm not sure that with the plumbing I have rigged, gravity is enough to supply the bowl.

Every little bit I learn and do makes it run better, but I still have a way to go before it is truly running like I think it should.

Another observation is with the Hobbs switch activated, it really bogs down.  I'm not sure if that is what is supposed to happen or if I have a problem with the dyna?  Maybe I have it set at too low of a pressure, but I have not figured out yet how to determine at what pressure the switch kicks in.  I think I would need some kind of pressure gauge that accurately reads at low pressure so if anyone has any ideas on how to get an accurate reading. I would appreciate it. 

There should be no bog when the switch kicks in. What is your retard set at? I had mine set for 5 degrees. I used my Mighty Vac to set the switch, it has the ability to pump and suck so I used it to set the switch at 2# of boost

[rdunbar123]

 
I finally did exhuast alll efforts and then put in the 27.5 jet.runs much better. one question I also  wanted to raise the needle but even though I could see the needle, The next instruction was to remove the 2.5mm allen screw but i had no ideal of what the were talking about? any ehlp? how do you access the needle. BTW who the hell tightened the screws on the bowl? a sumo wrestler?

I use a 1 1/8 open end wrench and insert it on the spacer behind the belt tensioner  and push it as hard as you can, i actually have a turn buckle i jigged up so i don't have to push so hard with my hand, it should be real tight!!.....Now that Hesitation should come out with a 27.5 slow jet. But you will have to exhaust all your efforts before you change that Slow jet   

[Murdoc]

When you take the 4 screws off the top and open the chamber for the slider, you will see a small black allen head screw down there that has a hooked piece of metal that holds down the needle jet.  I found that if you remove the phillips screw that holds the slider to the accelerator linkage that it's easier to work with, but it's not necessary to do that.  Anyhow, if you raise the slider up to the top, you will have full access to that small allen head screw.  You don't really need to take it out, just loosen it enough to move the metal keeper out of the way and then you can pull the needle out.  On mine, there is an e-clip on the needle and a small white plastic washer below that sits in a recess.  Be careful, as the needle bends pretty easily.  My e-clip was set on the middle notch (3rd up or down) by default.

I finally did exhuast alll efforts and then put in the 27.5 jet.runs much better. one question I also  wanted to raise the needle but even though I could see the needle, The next instruction was to remove the 2.5mm allen screw but i had no ideal of what the were talking about? any ehlp? how do you access the needle. BTW who the hell tightened the screws on the bowl? a sumo wrestler?

I use a 1 1/8 open end wrench and insert it on the spacer behind the belt tensioner  and push it as hard as you can, i actually have a turn buckle i jigged up so i don't have to push so hard with my hand, it should be real tight!!.....Now that Hesitation should come out with a 27.5 slow jet. But you will have to exhaust all your efforts before you change that Slow jet   

[fstsix]

Before you move the needle, turn your Air screw all the way down to bottom, then 3 turns out, It will be a little rich with that 27.5 but the Air screw this far just smooths it out. if you have a vacuum gauge hook it up to the manifold and tune with AIR Screw to highest Vacuum reading at Idle. make sure you have a fan on your motor if you do not have a Fan over ride switch, i use booth to not overheat.

[dreamaker]

Well I guess I have to bail on you guys. I had to take off my supercharger.  A while back I got laid off after 23 years , hoping I would get back into the work force soon.   Well it seems people don't want to hire a 62 year old buzzard like me and cutting off unemployment funds, thanks to filibusters, I had to make a decisions.  So its looking like I'll be selling my system.  Someone will be getting a bunch of extra stuff, pretty much complete and more.  I guess thanks to the pencil necks with MBA's, never know maybe the bike also.

Dan

[fstsix]

Well I guess I have to bail on you guys. I had to take off my supercharger.  A while back I got laid off after 23 years , hoping I would get back into the work force soon.   Well it seems people don't want to hire a 62 year old buzzard like me and cutting off unemployment funds, thanks to filibusters, I had to make a decisions.  So its looking like I'll be selling my system.  Someone will be getting a bunch of extra stuff, pretty much complete and more.  I guess thanks to the pencil necks with MBA's, never know maybe the bike also.

Dan

Dan sorry to here this, not to hijack this thread but, i thought unemployment beenys where extended this last week ?, not that makes everything better, But i hear you on this getting old stuff and being pushed out of a job from these new kids that are willing to work for bottom wages with out experience, after 35 years as a commercial flooring contractor, i have found that i am in more demand now as a seasoned Expert than i was 25 years ago,The problem is i am getting too old for this Hard labor LOL!! well if you have a price in mind for your blower let us know, or PM me with what your selling with maybe a picture and list, i will pass it around. Hope something comes your way soon. Greg

[dreamaker]

Well here is the deal ! Far as funds they won't last long and I'll be in the same boat. Just got to keep looking, so I can use my talents, don't want to be a greeter at Walmart. LOL.  I am a High-speed Photographer and a Prototype Model Maker. In the Photograph area I got to trane the the Chinese person so they could take my job to China. But my company could have put me back in the Model Shop I am very diversified.
Thing is I am a worker not a sitter, I bought the MagnaCharger before I got laid off, so when it came in I thought, should I sell it or put it on the bike. To keep busy I put it on the bike figuring I would be back to work soon, ya right.
Well it was fun working with you guys and trying to figure out the tweaks, almost got there just a little more.  I will figure my list of parts that will come with the charger as a bundle. I'm not going to separate anything, I have allot of extras for it.

Dan

[rdunbar123]

Dan,
 MY prayers are with you. I am in the chemical industry and it to has been slowly moving overseas. The problem is that there are almost no big companies that are truly american anymore. Therefore the MBAs who are interested in only short term profit don't realize they are laying off the people who buy ther products. I am 60, a chemical engineer, and a cancer survivor, if I lost my job I know I couldn't get a job. The reason companies don't value experience is because they can tell young idiots to do anything even if it is stupid and they won't object. enough ranting. you have been a big help to me and i hope you keep the valk. Good luck and keep us informed. Maybe someone on this board Knows of a need for your skills.

Well here is the deal ! Far as funds they won't last long and I'll be in the same boat. Just got to keep looking, so I can use my talents, don't want to be a greeter at Walmart. LOL.  I am a High-speed Photographer and a Prototype Model Maker. In the Photograph area I got to trane the the Chinese person so they could take my job to China. But my company could have put me back in the Model Shop I am very diversified.
Thing is I am a worker not a sitter, I bought the MagnaCharger before I got laid off, so when it came in I thought, should I sell it or put it on the bike. To keep busy I put it on the bike figuring I would be back to work soon, ya right.
Well it was fun working with you guys and trying to figure out the tweaks, almost got there just a little more.  I will figure my list of parts that will come with the charger as a bundle. I'm not going to separate anything, I have allot of extras for it.

Dan

[dreamaker]

Have to tell you I think putting the bike back the way it was, I thought was harder then putting on the supercharger.  Forgot you have to go through a sequence or you have to take things off tho put things on.  It seems when Honda engineered everything on the bike everything has its place. LOL !!! Took it out for a short run and nothing fell off, so maybe go for a cruise today.

Dan

[rdunbar123]

 i finally got smart and put masking tape on tmythrottle to see where the stuttering happens. I is always at half throttle. I have the  alarger air  filter, a 27.5 slow jet and the neelde is wherever it was set at by  the magna charger people it doesn't matter haw fast i twist the throttle, it is always about half wher it stutters. I can think of two things. a fuel supply problem. how long and what diameter are your fuel lines? and I nee to move my needle to a lower notch. any ideas would be appreciated. One thing I do havesupertrapps with 9 discs now installed. I tryed twelve and it didnt seem to matter.

The Slow jet will be in play almost all the way to 3/4 throttle, 90% of your riding you will be in the slow jet circuit, I stepped up 1 size on the pump nozzle, but it did not help that Cough that you describe, Here is a chart to show that the slow Jet is Active all the way through the Throttle position. look @ figure # 7 http://www.iwt.com.au/mikunicarb.htm "Pilot Jet is the slow jet"

[fstsix]

Have you looked at your plugs to see if they are black or fowled ?, also i didn't go back through this thread did you say you had a Pingle fuel valve ? if these things have been done try the needle 1 notch check the vent tube also or try running with the air cleaner Off. Edit.. i would run as large a fuel line as possible i have # 6 braided = 3/8 No interference no connectors but i have a fuel pump pushing, you need free flowing, that barb could be restricting the flow.

[rdunbar123]

Ihave looked at my plugs and all six look dark tan with no deposits I do have a pingle . do you have the old style magnacharger ?  s thatwhy you have a pump? I just used a connector for convieniece but will get rid of it. Thanks

Have you looked at your plugs to see if they are black or fowled ?, also i didn't go back through this thread did you say you had a Pingle fuel valve ? if these things have been done try the needle 1 notch check the vent tube also or try running with the air cleaner Off. Edit.. i would run as large a fuel line as possible i have # 6 braided = 3/8 No interference no connectors but i have a fuel pump pushing, you need free flowing, that barb could be restricting the flow.

[fstsix]

Yep old style, 45 flatslide , sits on top the Blower. need pump to push the gas up hill, sounds like you have a lean spot AKA flatspot, could be fuel line. try some new plugs and see if that helps.

[rdunbar123]

I finally figured out what was wrong. I had been stopping at 50% throttle when i was testing it because it stuttered. Today I just kept opening the throttle and it took off. I guess from the link fstsix sent me this means the needle needs to be raised or go to the next smaller needle. btw I did increase the diameter of the fuel line and shortended the line with no barbed fitting. I actuall just removed the left engine hanger and routing the tube was  easy. this also  allow easy access to the mixture screw to improve the idle. Thanks for the help. Ill be raising the needle next weekend.

[dreamaker]

Well I guess I'm going to sell my system. If you guys know any one interested let me know. I still have to take more pics and make a complete list of the extra components.  I'm shortly going to put it on EBay.

Dan

[Murdoc]

I might be interested Dan.  PM me to discuss.