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Louie, Technician
Category: Motorcycle
Satisfied Customers: 12665
Experience:  25+ yrs. experience
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I have a 1995 sportsman 400. antique i know, but good atv.

Customer Question

I have a 1995 sportsman 400. antique i know, but good atv. starts but stalls and hard starting after being run. will start after a while
Submitted: 2 years ago.
Category: Motorcycle
Expert:  Louie replied 2 years ago.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially when "...stalls and hard starting after being run...", attempt to start again with throttle partially open. Then proposed preliminary checks (if have not been done): • carefully remove the sparkplug; • check the burn color of the ceramic at the tip end; • results would indicate: - if black/sooty, then rich and/or vacuum leak issue or even an internal engine concern; - if light brown to whitish, then lean and/or an air leak concern; • check if the tip is wet with fuel; and then • cautiously perform a spark test; • results would indicate: - if black/oily, then internal engine; - if not wet or very wet with fuel, then fuel delivery; - if no/weak spark then electrical/ignition; • consider replacing the sparkplug(s) (even if new and just for purposes of eliminating as suspect(s).Please post back results / observations of the above once tried.It would also help to have a compression/leakdown test.