Replace spraque, which part?

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Skibum

Skibum

Joined
Mar 14, 2005
Messages
20
Location
Charlottesville,VA
I would like to replace a possible slipping spraque clutch. Do I replace only the free wheel inside the freewheel gear or do I have to replace the freewheel gear as well?
 
the freewheel is fine. just the bearing in the middle. look at your PMs

regards

Taffy
 
Taffy,
would you mind PM ing me also with the sprague info, i think I have same problem on my Brother in law's '05 FE550, time to open it up.

also starting circuit failed alltogether, so possibly electrical fault, or dud battery / charging circuit as it started on the button during the day, but late in the arvo, just gave up.

Thanks.

Azza.
 
faust

lets have the part number for that?

PM'd you azza

regards

Taffy
 
Taffy, thanks for the PM, i reckon the PN is Thanks Taff, 800.40. 021.100 (2005 parts).

Azza.
 
Thank you for your help. will try this week to get it going. Taffy thanks for the pm.
 
Just finished redoing the torque limiter and the free wheel. On the torque limiter I found 2 cupped washers and the friction disk came of the wheel. I epoxied the friction disk back on and made a .5 mm washer which I put between the 2 washers. On the free wheel I cut 13 mm of the spring and reconnected. Now the starter is working great. Thanks guys.
 
Cheeshead, it is easy and straight forward, just like in the doc. Only thing is I really had to heat up the sprague since they used thread lock. I could not get the bolt out with the air wrench, but a little heat did wonders.
 
Cheesehead & Skibum,

You are describing two different Items,

The one with the bolt is the torque limiter, The sprague is the one that looks like a ballbearing, and sits behind the clutch. Needs no heating to disassemble !!!!

And they can both slip !

Anders DK
 
Thats what I thought...

so what are the symptoms in each case?

skibum, did your bike have a whining noise or did it just sound like the starter spinning without any resistance?

chesehead, what does your bike do?

My bro in laws 05 FE just turns on the e start one revolution at the max then sounds like the starter is spinning with no resistance, I believe this is sprague, but if it makes a whining or squeeling that is meant to indicate the tourque limiter (as I understand it so far anyway).

Azza.
 
I don't have the experience to tell the difference in sound. Mine was spinning as well (Somewhere), and I am therefore in the middle of an upgrade. See MY STORY about this. So to be safe I did shim up the torque limiter and also went over the spraque. Ifound my rollers and the other parts witout any wearmarks, so I just polished up and tightened the circular spring up about 5 mm. I can't say yet if that solved the problem as I am still awaiting other parts to put the bike back together....

Have noticed that there are a lot of terms used for the same parts, so it CAN be quite confusing reading up on this.

A couple of threads though:

http://husaberg.org/index.php?name=PNphpBB2&file=viewtopic&t=10421&highlight=sprague+theory&sid=816555030f774410527de439473cf7c0

http://husaberg.org/index.php?name=PNphpBB2&file=viewtopic&t=9765&highlight=sprague&sid=816555030f774410527de439473cf7c0

http://www.husaberg.org/index.php?name=PNphpBB2&file=viewtopic&t=8043&highlight=ducati

And very interstingly:
http://www.mad-ducati.com/Technical/StarterSpragClutch/SpragClutch.html

All the info IS out there, fortunately Iv'e had the time (at work !!!) to read trhough alot and bookmarked interesting stuff !

Anders DK
 
I have replaced the torque limiter some time ago, if this part fail's the starter will spin without any resistance. If the sprague thing fails the starter will engage at first but will not stay engaged which will result in a free spinning starter. That's my problem now. (together with a swing arm axle that broke spontaneously...????)
 
My bad, the torque limiter has the bolt which needs to be heated.

My starter would sometimes catch and sometimes just spin through. While I had the engine side open, I checked the torque limiter and it slipped at 6 ftlbs. Since the spring mod on the sprague clutch only takes a couple of minutes I went ahead with this as well.
 
I'll add this to the discussion for people's consideration - I have offered this info before... :)
My very low hour 650 sprague started to give up - would catch but not roll the motor over. Through a convoluted thought process and a lot of input from folks here I settled on cooler temperatures and oil drag as the possibler culprit. I changed to a 0W-40 Shell Rotella and poof! I had my estart back. I then moved back to a 5W-50 and have had no starter problems since. I was running 20w50 at the time the trouble started at 10-15C.

Mark
 

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