Question about 2006 Honda Xr 250

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The engine needs to be serviced. i need the specs on tappet clearances, timing chain adjustment and carburetter adjustment as well. it's a chinese bike with a honda 250cc based engine.

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  • Anonymous Mar 23, 2014

    honda motor bike 1985 xr250r

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  • Honda Master
  • 767 Answers

I would recommend you , if there's no problems at all to the engine of your bike..like missing ,hestation or idling or tick over and speed and or any kind of noise, thn you need not worry about anything.
Just remove the spark plug examine it to its condition and gap , reset the gap if needed or best replace it.
Check too the air filter, pressure blow it and if its in worse condition replace it.
Check to the battery if it has one , if its a non-maintenance free check the acid level and if low fill her up to the level with distilled water.
Check the brakes and adjust as necessary.
Check the drive chain and adjust as necessary.

Once done.... your service is done!
Have a nice and safe riding!
Good luck.

Posted on May 12, 2009

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Posted on Jan 02, 2017

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1 Answer

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You have asked a very big question. Adjusting the tappets is another way of saying adjusting the valve clearances.

Lots of engines these days are fitted with hydraulic tappets that are self-adjusting. Some engines are overhead camshaft types with bucket tappets and the clearances are adjusted by measuring and selecting different thickness shims. The shims are sometimes under the bucket and sometimes over. The former is a fairly big and complex job to adjust and the latter is fiddly and requires much patience.

Traditional designs using adjusting screws and locknuts exist on all manner of engine types and once the principle of which one to adjust when is learned, these are relatively straightforward.

I strongly suggest you discover first what sort of tappets you need to learn to adjust, learn something about the way the engine works and why the tappets need periodic adjustment and then pay somebody to show you how to do the job so next time you will be able to do it yourself.
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