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2003 Suzuki 400 LT-Z Starting

WetVertical

By WetVertical
in Suzuki ATV Forum

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  • Admin changed the title to 2003 Suzuki 400 LT-Z Starting
Mech Mentor

Mech

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I presume it was running fine before this work ?

So you'd changed the plug and oil both together and at the same time ? And you tried starting it and it wouldn't start at all, didn't fire even ?

So did you check the sparkplug, which would of course be the obvious problem ?

And if it did never start after the service, how long did you crank it before testing the compression ?

If the oil was bad it wouldn't cause enough wear, that fast, to lower the compression. I'd suggest the rings are stuck in their grooves.

I'd also suggest you use a screwdriver or something and dip a bit of the oil out of there and see if it will wash off/dissolve in water.

 

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WetVertical Newbie

WetVertical

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When I parked it in the garage it was running great, slight ticking from the timing chain, which i checked the cams with a feeler gauge at top dead center intake was within spec 0.10 slight drag on exit, and the exh was 0.20 in spec according to what I read for the specs. I did a spark plug change and oil, checked for Spark has a strong spark. 

But the compression test yielded roughly 30 PSI factory spec is 142 PSI.

Edited by WetVertical
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