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Starters & Stators??

Joined Jul 2003
330 Posts | 0+
Nth Tasmania ( Australia )
Ok, I got sick of waiting for my 04/550 starter motor, so I managed to find out that the Mitsuba SM-14( fitted as std) has a spline that is fairly common. So I bought one on Ebay(US) for $20us.I got it the other day, and had to make a bracket to fit it, as the mounting end and holes are different. I used my old s/motor mounting end and the remainder was from the CBR600 f4 purchased on ebay. The newish s/motor has a bigger armature and is aprox 9mm longer.
Having fitted it and getting very excited about how much money I saved and how clever I had been, the Berg wont start off the button? Bugger!
I cant work it out. It still kicks ok. So today I spent the day following the "hard starting guide". I am unsure of a few things, firstly the resistance between the yellow and blue wires, does " <1.0 ohms" this mean the reading should be LESS than 1 ohm or GREATER than 1 ohm??
I measured 0.4 ohms? All the other values seem to be ok , but with the following exception, "Coil charge wires ( red/ black) Volts AC, when the bike is "kicked" (loaded and unloaded) I get 55 VAC, compared to 31 VAC when electrically operated??????????????????? So does this mean (A) the engine doesnt turn over fast enough on the button to create aprox 35VAC, or (B) is the s/motor drawing to much away from the stator, or (C) is 0.4 of an ohm not enough resistance and my stator is stuffed?????
I have tried to contact Mitsuba to ask how the s/motors are rated, but it is a Japanese site and they have not answered 5 requests? By the look of the s.motor I would have thought it would more than do the job? And would this have happened if I had bought the 04 s/motor which is also a larger unit???????????????????????????? Like I said I am stuffed!
Could it be the "auto decomp", I have actually pulled the manual decomp, lever in a little as I turn the motor over(as this worked with the old s/motor, before it burnt out) but it still wont go.
ps, I also have two batteries fitted!
Please help, if you can.
Thanks,
 
Scully
Onya for sorting out a way to get (hopefully better, definitely cheaper) non OEM parts to fit.

The yellow & blue wires from the stator are the 12v system charging output. They are connected inside the stator to a series of coils of fat wire with a few turns each. They should have less than 1 ohm resistance and yours sounds OK. When people talk of stuffed stators it is virtually never these windings that are the problem - its alwys the CDI charge windings on the red/green/black wires.

The difference in coil (actually CDI charge coil) AC voltage you are seeing indicates it definitely isn't spinning as fast on the e-starter as it is with the k-starter. I would have thought you would see much higher voltages from these coils, even at crank speeds, but perhaps they are OK if the measurements were done with the CDI connected.

The 12v electrics, including the starting system is independent to the magneto/CDI spark system. No amount of load on the battery (in fact it doesent even need to be present) will affect the spark. On some of the later model jobs I believe there is a 12v wire connected to the CDI/coil unit to modify the spark timing curve but you should still get good spark without a 12v system.

Engine crank speed seems to be what affects spark, assuming the CDI charge coils and CDI/coil unit is OK.
 
Brad

I did it as per the "Husaberg hard start guide" I downloaded from here. It says i should get 30/ 35 VAC on the black/red wires (coil charge wires) and I get that and more. So it sounds like my stator is ok?
The newish s/motor is from a CBR600 2002/2003 ( I think) maybe it just turn fast enough? And when its on the CBR it may have some kind of "gearing up " system??
Thanks for the compliment, the R6 s/motor is the same to, I found a lot with the same spline but all have a different mounting system.
Come on, I need some more thoughts here, Im not having a push button bike that has to be kicked!
 
All I can offer is the usual: Start dickin' with the decomp arrangement to get it to spin faster.

I'll probably have to do the same. I thought I might get away with the better battery on mine but it's still marginal. I usually use both the e-start & kicker together.
 
Duplicate Post as taken from stator rewind thread:

Hi Scully,
Peak Kicking RPM is higher than that of the average starter RPM. When the Peak kicking RPM coincides with that of the ignition request a spark is faithfully generated. I am currently (when financial and time restraints allow) working on an ignition upgrade that will enhance low rpm spark production.

Best Regards,
Dale
 
hi scully
i was having similar problems to yours with my 2002 650 i also got the hard start guide mine was not starting on the button but after taking the stator off and cleaning it REALLY WELL ( i used a dremel type tool with a tiny wire wheel attachment ) it will now fire most times on the button :D its still not perfect when i get a bit more time the carb will get stripped and cleaned , when you turn it on the button are you getting a spark? mine was hardly visible but after the clean big and fat and blue i got a few replies when i put a post up might be worth a look
good luck
jonnieboy
 
G'day Scully,

If you've got 2 batteries, try setting up a relay connection so that when the starter is engaged you get 24v. Reminds me of my VW buggy that has 12v electrics with a 6v starter. It always starts now, didn't always with the 12v starter. Just don't spin it for a long time and overheat it and I reckon it might be OK.
 
You could try a cartridge start system like they used to use on planes. :wink: Screw in a shotshell cartridge without the shot, wind the engine to the right position, cover your nuts & bang the firing pin. The charge blows in above the piston & cranks it real fast real quick :shock:
 
Yes the 24 volt start system is something I have thought about for a while, but how exactly do I do it?? I reckon this would work.
Since I bought the Berg I have cleaned and looked after the stator like it was my own child, and the "readings" I got seem to indicate it is good? The coil is new.
Today I thought it might be the solenoid so I checked the resistance while open and closed, and this appears good to? Next I checked the voltage across it while closed, and I get 0.5 of a volt lost, so this seems good to.
Then I checked the voltage across the batteries while cranking and idle. I get 13 volts idle, and the batteries get down to 10 volts while cranking?? This is a bit of a loss?? I also noticed while cranking that the s/motor turns the motor over for a while ,then something lets go and it free wheels?? What is this? Is this the "sprauge clutch" or what ever I've heard people talk about? It also seems to me that the longer it turns over the easier it gets to turn?( with in reason). There must be an electrical "guru" out there whom can help us ALL out??
What about this "no-lodgy" wire ?? Has anyone used it or heard about it?
Maybe the new 04 s/motors spin at a higher RPM??
 
Scully
Measure the voltage between the starter terminal & ground while it is cranking. You are doing well to get better than 9 volts. Mine would drop to 5V or so with the engine locked against a compression. Very little of the supply volts was being lost as drop across the starter lead, the solenoid or the earth return path through the frame - perhaps 1.5V total. The battery voltage was dropping due to internal resistance of the battery. If you are seeing 10V across the battery while cranking it is doing OK.

Sounds like your sprag clutch is a bit dicky too.
 
So 85 viewings so far and a handful of replys? Doesnt anyone out there understand auto electrics???????? Come on! There must be a fix for this pathetic starting probs we have with these Bergs, 24 volts while cranking? what about a capacitor that discharges only when the button is pushed? There must be something we can do!
I dont really want to go back to the dealer with my tail between my legs and ask for the 04 starter!
COME ON !
 
On a recent KTM ride here in Tassie a bloke had his clutch lever assy all covered up with plastic bags. Well as the ride went on he eventually told us what IT was all about but noone was allowed a look. He had come up with a hydraulic clutch and rear brake all in one?? You pull the lever in half way for clutch and then the next part of the pull is rear brake. It is currently awaiting a patent?
But we cant work how to make our bikes turn over faster or get a bigger spark!!
 
Scully

Every single measurement you have made seems OK so I am guessing there is nothing wrong with your electrical system at all.

It would appear that the replacement starter motor is not up to the job. Thinking logically, a CBR600 inline 4 is going to be a LOT easier to turn over than a big single, so the starter may be of a lower rating, despite its larger size. Or it may simple be designed to produce peak power at a different rpm to the stock unit. Without a detailed spec sheet for both starters you are guessing I'm afraid.

24V is way too much, don't go there. Starters are designed to work at around 8-9V. Try connecting a car battery across the Berg battery and see if it turns any faster. Then try it with the car engine running. Then let us know the results.

My theory is that you have an auto decomp problem, that may have caused the demise of your original starter motor. Having said that, my 02 had exactly the same symptoms and nothing the dealer tried could fix it (including new 03 decomp mech). It would be good to at least try another (correct) starter motor in your bike - do you have a friend with the same or similar bike perhaps?

HTH

Cheers

Jerry
 
scully
when i was in the process of buying mine it wouldnt start on the button we tried a 04 battery which i still have on and we also tried an 04 starter you just have to change the bracket but as i said before it now starts most times on the button but when its gonna go it turns over real slow almost stops at tdc then fires so it got us wondering if speed of cranking is that important ( i could be very wrong only had bike a couple of weeks so still playing ) when you kick it with the plug out have you a good spark compared to starter turning ? you could always get a mate to hold ht lead and compare how much he jumps kicker vs starter
does < this mean more or less than im sure i got 1.6 ohms when it said <1 on test

jonnieboy
 
Scully
Agree totally with what jerry said. What is the volts across the starter while cranking?

Capacitor is of no use at starting type currents. They store millions of times less energy than the battery. For it to make any difference at it would have to be physically larger than the bike!
 
Not sure any of this will help.

While starting I measure around 10.2V on the starter motor. I have a YTZ7S battery fitted. In the past I have checked the RPM at which the starter turns the motor both while starting normally and with the manual decomp pulled in. Unfortunately the thread is gone but from memory it turned over at about 400 RPM with manual decomp and around 370 RPM while starting normally.

I checked the RPM by removing a valve inspection cover and counted how many times the valves opened during a 10 second period. Knowing that the engine does 2 revs for every opening you can work out the starting RPM.

As I said, I am not sure regarding the figures but if you want to do this check to gauge your starter performance against mine I will gladly head upto the garage tonight and recheck the numbers.

Obviously the test should be done after the bike has been warmed up.
 
Today

12/5/04
Today (before afternoon shift) I put the batteries back in the bike, checked earths, wires, all the silly obvious things. Then while cranking the bike over I measured the voltage across the s/motor, it gets as low as 2 volts when it compression locks, but mostly is about the 7/8 volt mark.
I have talked to an instrument electician(my brother) whom says after viewing the circuit diagram it is definatley the starter motor NOT turning the motor over fast enough to get a big enough spark from the stator. He has also told me how to hook up the batts so I get 24 volts only at the starter when the button is pressed, I will try this JUST to see if the spark increases?
I also hooked the bike up to the car which took the voltage up to almost 14 volts, and it did ALMOST start twice?? So it sounds like we are on the right track. If the batts in series gets the bigger spark, I could hook up a 6 volt battery instead as the spare only for starting which would not get charged. Either this or try to find out whether the 04/550 s/motor will ACTUALLY turn the motor over faster? By the way these are still NOT in stock at my dealer or Husaberg?
See how I go next?
 
scully

your brother will have told you to connect one battery on to the other and that is -thankjfully - 12 volts. you don't wanna see 24 volts!

it gets ugly. but i get your drift and good luck. i hate electrics.

Taffy
 
Scully, 7-8 volts at the starter is obviously too low.
You didn't mention what voltage there was at the starter when connected to the car battery.
The possibilities are still

1) Not enough current - possibly dodgy battery or solenoid
2) The new starter motor is dodgy
3) The auto decomp isn't working correctly putting too great a load on the starter.

Its difficult to overlook the coincidence between your last starter motor burning out and this one struggling to turn your motor over. Perhaps the auto decomp needs a look.

Again to try and help I would suggest the following.
If you can get your hands on a dial indicator with magnetic base (your brother may be able to help) remove the exhaust valve inspection cover and the stator cover.
Place the stylus of the dial indicator on the top of the adjustment lock nut for the valve, rotate the motor until the autodecomp actuates (timing marks around 10-11 o'clock) Measure the lift of the exhaust valve and let us know what it is.

I'll do the same check on my bike tonight. This will give you a good indication if the autodecomp is giving sufficient lift.
 
Brian

When I had the old s/motor and batteries connected you some times had to pull the manual decomp in a tad to get it to fire?
I think the s/motor is good, the batteries have both been load tested and the solenoid appears ok? If you disconnect the lead to the s/motor the solenoid gets a 0.5 voltage drop across it. When you watch the spark on the plug, it is a big difference between kick & button?
It was a bit hard to see the voltage across the s/motor while I had it hooked up to the car, but I noticed APROX 7/8 volts? This was after 20 or more secs of cranking, I didnt think it was to bad?
I cant get my hands on a dial indicator, can I do it another more crude way??
I have often thought it could be this decomp thing but noone wanted to help me the last time asked about it? I understand what it does, and by me manually doing it, it should still start. I dont try and crank it while it is in a comp lock. Even with the manaul decomp in, the spark doesnt get any better??? This would tend to suggest that the motor is not turning over fast enough? Dont you think? When you talk to others(non Husaberg types) they all say that it sounds like the motor isnt cranking fast enough.
They also say why wasnt this all addressed when the bikes were new?? It seems WE put up with these euro quirks?
I have tried AGAIN to contact Mitsuba (the makers of these s/motors) to get info but to no avail, as I dont want to order 1000 s/motors??? But I would think the s/motors would all be the same from the factory and the different manufacturers would use internal gearing to suit?? Maybe I'm wrong?
I dont want to wait and fork out for the 04 motor only to find that its the same?
Thanks for the help B.
 

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