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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Don't forget to check your engine bolts after a few runs on a rebuilt TTR!
Post Info TOPIC: Don't forget to check your engine bolts after a few runs on a rebuilt TTR!
TTRfan


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Don't forget to check your engine bolts after a few runs on a rebuilt TTR!
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I have recently rebuilt a standard 250 TTR engine and need to test it out.

The only TTR left in my garage now is the 325 so my aim today was to whip out the 325 engine and replace it with the shiny "new" 250 rebuild.

It was interesting that, despite torquing up the engine bolts when I fitted the 325 engine several months ago, the 12mm bolts on the top front engine mount were much too easy to undo - not loose but not as tight as they should have been no

This is not a new occurrence and I am wondering whether the nuts have suffered from being re-used several times? Any thoughts guys? 

I swapped the engines over without any traumas but, too late, I spotted a flaw in my planning - see photo below:

Starter missing.jpg

Yup - I have forgotten to fit a starter motor disbelief

Getting a bit chilly now so will attend to that tomorrow!!!!

Brian

 



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pug


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Brian as you are thinking bolt threads stretch as do the threads in nuts they still do up but the thread is distorted so less contact with each other. I'm happy to use all but head bolts an nuts over an over. put a spot of lock tight on the rest them an always use a torque wrench.

Pug

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TTRfan


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Thanks Martyn! Loctite will be the way to go biggrin



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TTRfan


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Decided to try something new (for me at least) when fitting the starter motor.

If the cover and starter gear are removed along with the clutch cable retainer post it is possible to angle the starter motor so that it will fit in without disturbing the external oil line and cam chain tensioner thumbsup.gifthumbsup.gifthumbsup.gifthumbsup.gif

Made it a very quick job and saves annealing copper washers and risking an oil leak on the oil pipe banjos (which quite often give me a problem) wink

Fitting starter motor 1.jpg

Fitting starter motor 2.jpg

 

A slight downside to this way of doing it is that the starter motor retaining bolt nearest the barel is a tad inaccessible cry  I had to use a quarter inch drive socket with a "wobble" extension to get it tight.

If you are wondering about the red socket, I have painted my 10mm sockets and spanners red so that I can find them easier - it's an age thang disbelief

Starter motor bolt inaccessible.jpg

So you need to balance out the pros and cons.

I hope that helps someone smile

Brian



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