Question about 2008 KTM 250 SX-F

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Haven reall problems starting bike when warm espeacially valvw clearance on inlet is 0.10 and exhaust 1.2 are they to tight

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I used to have lots of trouble startin the bike when warm too, but really it is all about technique. Find T.D.C by gently pushing down on the kick start. Then pull the hot start lever in, and kick slowly and gently all the way down, rather than kicking as hard as you can. This should start the bike a lot easier.

Posted on Dec 10, 2009

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If they where to tight it would not start when cold, and get easier when warm. I would look at overheating check oil/coolant levels.

Posted on Dec 01, 2009

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I have a lexmoto arrow 125 HT 125-4F WHEN IT IS COLD IT TICKS OVER AND RUNS WELL BUT WHEN IT GETS WARM OR HOT IT STOPS AND WILL NOT START FOR ABOUT 10 MINS AND THEN RUNS AND KEEPS DOING THIS IS THIS THE...


Not too sure could be a couple of things or 1 simple thing, wouldnt know without looking at it but here's the clearance numbers.

Valve clearances are, Exhaust valve (imperial) 6 Thou, (metric) 0.15mm, Inlet (imperial) 4 Thou, (metric) 0.10mm.

Source: http://www.chinesemotorcycledealers.co.uk/HT125-4F.php

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Dear Support Manager, I have a 1972 triumph


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1 Answer

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it probably isnt a firing order problem, or it probably wouldnt run

one coil fires 1 & 4 cylnder, the other coil fires 2 & 3 cylnders, as the pick up gets its signal from the crank, it sends a spark to each cylnder on the exhaust stroke as well as the compression stroke, ignition timing also doesent change as it is electronic and cant drift out like when points wear.
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1 Answer

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