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December 28th, 2007, 08:06 AM   #1
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torque limiter

Hi All,

Removed the starter toque limiter today and fitted the one I recieved from Dan at Motoexotica and this has solved the slipping starter problem.
I tested the toque of the original one I took only 5Nm hence the slipage, I did the same test with the new one and I could get 25 Nm before it would slip.
This might be a test figure for the doc Taffy.

Regards

Sparks.
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December 28th, 2007, 08:10 AM   #2
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What year and model do you have?
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December 28th, 2007, 08:29 AM   #3
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Hi Husa,

It's a 04 550, I already changed the spague clutch earlier this year but made no difference. When I took the old one apart it has like a brake lining sustance on one side of the gear this is what wears and gives the slip.

Regards

Sparks.
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December 28th, 2007, 10:31 AM   #4
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That was a great price you paid for that limiter Sparks,Dan is the man!

If I had known I would have tryed to get it first

Ya breakaway value should be between 7 to 15 ftlb.
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December 28th, 2007, 11:36 AM   #5
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Since we're on this topic - anyone have any thoughts as to whether this torque limiter is susceptible to performance loss due to colder weather?

My 06 FS will not turn over on the e-start at temps below 15C - the torque limiter gives up completely - get it to 15C and it will start every time as soon as you hit the button.

I have yet to take it a part - waiting on replace limiter...but I'll test the torque when I pull it at room temps and then at cool it in the fridge and see if it changes.

Either it is the increased engine drag due to low temp oil viscosity or somehow the torque limiter is directly effected...

Any thoughts would be appreciated

Cheers

Mark

NB: Froggy - if you want my old one when its out, its yours - it'll probably work fine in your part of the world
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December 28th, 2007, 12:55 PM   #6
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My 05 also had the gear wheel torque limiter (aka starter clutch) issue and had it replaced under warranty. It seems a batch of 04 and 05 bikes had this part outsourced and the supplier built them with too low of a slip factor.

With temperatures reaching chilly 38f here in SF I have also noticed the e-start laboring a bit more that usual.

My starting technique is to use the manual decompression lever for the first 2-3 seconds of the cold starting procedure to allow the motor to turn easily and get some oil circulated. After that a quick twist of the throttle for the accelerator pump to squirt some gas in the carb and then hit the e-start again.
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December 28th, 2007, 02:15 PM   #7
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STGuy > your approach is sound but in my case the torque limiter won't even turn the motor with the decomp pulled in (I am sure the decomp is working because I can roll the motor through with kickstarter using my hand)

I suspect when I get the torque limiter out I will find out it is shot, but I do want to know if using it at 15C is destroying the limiter - I was always under the impression it was the battery's ability to crank the starter (or the starter itself) was the limiting factor for cold starting....

Cheers

Mark
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December 28th, 2007, 07:12 PM   #8
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I have the same problem with my '06 650e. I googled Motoexotica for info, but didn't see anything resembling torque limiters.
I haven't tested the breakaway on my starter, but I'm sure it has a problem. It slips on a regular basis and I regularly have to use my comp. release. Like I said, I haven't tested mine, but I would probably rather just order a new limiter and install it rather than pulling the bike down twice.

LOU
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December 29th, 2007, 12:38 AM   #9
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Originally Posted by BOSS
That was a great price you paid for that limiter Sparks,Dan is the man!

If I had known I would have tryed to get it first

Ya breakaway value should be between 7 to 15 ftlb.
Hi Boss,

I was told it was always the sprague clutch that gave in the go, but there was a thread by one guy on here his one and only not seen him since and it was about the torque limiter and how there was a problem with them on the 04, but after replacing the sparague it could only be the limiter.
There was no particular reason why I rang Dan I just wanted to see the price difference between the US and the UK but they were still expensive to buy new in the states thats when he said he had a used one but only covered 10hrs. So I had to have it, even with the express carriage it still worked out at roughly half price.
And like you say Boss, Dan is the man.

Regards

Sparks.
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December 29th, 2007, 08:49 AM   #10
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ok steve

i'm thick. so you tell me what i need to know here!

we have a sprague bearing behind a circlip inside a gear. the gear has a toothed wheel sit within it as well. so where is this material that wears away?

i'll be glad to put it in the doc! all i could see on my sprague bearing was 'NW'.

while i'm here is there anyway you can tell early from late stuff just by looking?

regards

Taffy
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