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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Another Sprag Replacement
Post Info TOPIC: Another Sprag Replacement
BM Steve


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Another Sprag Replacement
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Hi All
Well I've had the starter bang going on for a while now and decided it's time to fix it before anything else gets damaged (Hopefully)

 

So here is the patient in the theater, all prepped and  ready for surgery001.jpg?lgfp=3000

 

The patient stripped down and cleaned up ready for the new bits, the gasket came off cleanly and unbroken as you can see, good, 1 less part needed

003.jpg?lgfp=3000

When I pulled this out things were looking hopeful

002.jpg?lgfp=3000

The rest of the bits and a few tools I used, lucky I had that 1 1/8th spanner, a perfect fit.
All the parts came out cleanly with no force needed, all clean with no metal filings or metal chips anywhere in evidence

004.jpg?lgfp=3000

The offending part, notice the 2 cracks at the top

005.jpg?lgfp=3000

Now all I have to do is order the new sprag from Brian

 

To Be Continued .....

 

 

 

 



-- Edited by BM Steve on Friday 28th of February 2014 10:39:29 AM

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2004 TTR250 - Highway Dirtbike Hand Guards, 38mm Bar Risers, D606 Front & Rear, Opened up Airbox with Twin Air Filter, Re-jetted Carby, B+B Bash Plate & Frame Guards, DIY 3mm Alloy Tail Tidy, 14/47 Gearing.

 
TTRfan


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Looking very clean and the gears are in good condition biggrin

You will find the new sprag also has those "cracks" Steve wink

Brian



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BM Steve


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I thought the cracks looked a little uniform !

So do I still need a new sprag ?

It seems to turn OK in 1 direction and locks in the other, but all the little teeth seem to be worn down on one side

Here's a couple of close Ups, is that worn and need replacing ?

It definitely has a bang when you turn it off.

 

Thanks

Steve

006.jpg?lgfp=3000

 

 

 007.jpg?lgfp=3000

 



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2004 TTR250 - Highway Dirtbike Hand Guards, 38mm Bar Risers, D606 Front & Rear, Opened up Airbox with Twin Air Filter, Re-jetted Carby, B+B Bash Plate & Frame Guards, DIY 3mm Alloy Tail Tidy, 14/47 Gearing.

 
TTRfan


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I find it difficult to tell how worn a sprag clutch is unless it is very obvious. From what I can see, yours looks OK but what are the faces of the "teeth" like?

If I have an engine that bangs on shut down then I just replace the sprag clutch as a matter of course as the consequences of the damage the kickback can cause are expensive!

Brian



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