Sprag Clutch Failure, Part I - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #11 of 107 (permalink) Old 05-05-2009, 08:18 AM Thread Starter
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No worries, glad to try and help.

And, if rebuilding seems like too much of a pain, I can do it for you.
Just send me:
  • your busted sprag clutch (in one piece),
  • a replacement spring (or $ to buy one),
  • a tiny tube of green loctite (or $ to buy one),
  • return shipping label (or $ to ship it back),
  • and beer $.
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post #12 of 107 (permalink) Old 05-05-2009, 08:42 PM
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Gotta have beer $$. I home brew so i'm good to go, but I believe I am fully capable of handling this however, some may not. I made a little headway today. Almost ready to drop the engine. I'll be updating this in my post. thx
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post #13 of 107 (permalink) Old 05-06-2009, 06:39 PM
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Holy Cow.

Your a genius.

Great post Alterna, guess this answers the question I posted earlier and ask how the sprag worked out!

Cheers

Say if you want a place to stay in the Fl. Keys.......I am planning on motor installation in 2 weeks, wanna help?!
I've got beer!!! :

The difference between genius and stupidity is genius has its limits
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post #14 of 107 (permalink) Old 05-07-2009, 07:16 AM
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Great post on the sprag spring.

Good to have a cheap fix.

However I didnt quite understand what you did to the spring ie the bit about cutting and reconnecting. I bet if I try that it will snap when in the engine. Is there a special way of doing it? Or is it simpler than imagined?

Cheers
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post #15 of 107 (permalink) Old 05-07-2009, 11:48 AM Thread Starter
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Quote:
Originally Posted by SpeedFreak View Post
Great post on the sprag spring.

Good to have a cheap fix.

However I didnt quite understand what you did to the spring ie the bit about cutting and reconnecting. I bet if I try that it will snap when in the engine. Is there a special way of doing it? Or is it simpler than imagined?

Cheers
It is actually that simple, and exactly what Triumph did on the original spring.

Look at the original spring very closely. You will notice that it is wound inside itself in one small area. It is very similar to, when as a child you may have joined two ends of a drinking straw. By creating a small end and feeding it inside the other end, you were able to create a loop.

You will notice that the two ends aren't identical. One end is consistently sized, while the other end is tapered to a point.

The original spring loop ends aren't adhered together by Triumph, neither are shaft seal springs you'll buy as replacement parts. All you have to do is unwind this union. If you have concerns about the strength at the rejoined ends, you can always loctite them together(I did). I also threaded mine twice the depth of that noted with the windings at the shaft seal ends.
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post #16 of 107 (permalink) Old 05-07-2009, 12:00 PM
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Brilliant, just brilliant. I love fixes that cost almost nothing. Too bad it is such a pain to get to.

I vote this should be made a sticky. :

Now,where is that immoderate moderator anyway?

Cleaning out my T3 spares - Tokico 6 pot calipers, T3 (Daytona/Trophy/ST/Sprint/Trident) headlight switch, search classifieds for my id
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post #17 of 107 (permalink) Old 05-15-2009, 11:33 PM
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Very informative...

I like the price....we just got the sprag out...the spring you speak of is really weak. It curls when taken off. We have a spring off a seal from another bike, right width but about 1 1/2" diameter. It stretches around the sprag no problem but might be too tight. Should I look for something closer or will this do.

Mike
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post #18 of 107 (permalink) Old 05-18-2009, 07:47 AM
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Too late....owner decided he wanted it thrown back together over my objections. To make a long story short its fine, bike starts no problem. The spring we used was fine.

Thanks for the cheap fix. I was the one I was looking for.

Mike
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post #19 of 107 (permalink) Old 05-29-2009, 12:55 PM Thread Starter
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Seal Part Number

http://www.woodys-auto-supply.com/au...rod=NAT-225545
National Federal-Mogul Oil Seals
225545
2.165 x 2.953 x 0.394


There is a spring just inside the black lip. You can just make it out in the picture.
It will be a tad too long, so just uncoil cut @ big end, and recoil spring into itself.
I made mine a tight fit as well.
Approx 1000 starts later and all-is-well.
Mikerunsjax likes this.
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post #20 of 107 (permalink) Old 05-29-2009, 01:13 PM
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Thumbs up

Quote:
Originally Posted by Alterna View Post
http://www.woodys-auto-supply.com/au...rod=NAT-225545
National Federal-Mogul Oil Seals
225545
2.165 x 2.953 x 0.394

~~$7 for a sprag fix. :

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