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The TTR250 FAQ web pages -> TTR250 -> Just joined the forum? -> NEW TO THE GAME
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Mickyb


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Hello all, having come from a trialling back ground, I have decided to have a go at Green Laneing and this week I have bought a TTR250 Open Enduro. The bike I am told is built on a 1993 frame, with a 2004 5GF engine having a Wossner graphite coated forged piston, CRD performance exhaust system,SHOWA 47mm inverted twin chamber USD forks. In the next week I will post some pictures for your viewing and thought on my purchase as a new starter.



-- Edited by Mickyb on Friday 18th of November 2011 01:12:58 PM



-- Edited by Mickyb on Friday 18th of November 2011 04:08:52 PM

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TTRfan


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Welcome to the forum- look forward to seeing the pics wink

Brian



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domski1


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Welcome to the forum, it doesn't have a yellow frame by any chance?

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Cubber


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Another one to swell the blue ranks 

WELCOME

Martyn



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Mickyb


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Yes it does, did you see it advertised?



-- Edited by Mickyb on Friday 18th of November 2011 04:24:14 PM

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domski1


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Yes I saw it on eBay, It stood out with having the upside down forks and obviously the yellow frame!

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Mickyb


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Having joined the forum and read about the TTR's and their problem with the Sprag Clutch Bearing, mine may be showing signs of wear. I only mention this because it does have the symptons, having a slight knocking sound when you engage the starter and when you turn the bike off, I am no expert, but do I need to look at replacing the bearing? It doesn't sound that bad, any advice would be helpful.  



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domski1


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There is a good thread somewhere on it, I am sure martyn or Brian will magic it up! I would take the starter motor cover off first and inspect the splines on the starter motor and the top idler, it's only 3 bolts so a five min job, then you will no more what you are dealing with.

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Yup, Brian put this page up especially for you:-

GUIDES

If you click the above link then look at what's on offer you will find, near the bottom of the list, the one about "sprag clutches".

Martyn



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Mickyb


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Thanks for the advice I will take a look tomorrow



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Mickyb


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If the splines were in good order what would that tell me about the Sprag bearing.



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domski1


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If the sprag clutch has been sticking for a while it can damage the splines on the starter and the idle gears, these parts are also very expensive so if you check them first just to be sure.

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Mickyb


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Will do.



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TTRfan


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It really is difficult to describe the noise made on shut down when a sprag needs replacing other than saying its a metallic bang which makes you wince cry

A clunk is OK and happens even with a new sprag fitted.



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Mickyb


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As you say it is difficult to say what it is and it does make me wince. I will check the splines on the starter as Domski1 says. If the gears and splines look oK is there anything to worry about?



-- Edited by Mickyb on Friday 18th of November 2011 09:20:39 PM

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TTRfan


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If the sprag is wearing and starting to bang then damage may not have been done yet but, damage will be inevitable if a worn sprag isn't replaced.

It's a difficult call and, if you are unsure, it would be worth asking the opinion of a proper bike mechanic who you trust and hasn't got a financial incentive to condemn the sprag....

Brian



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Mickyb


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Thank you for your advice.

Mick



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