first mistake..taking it to a so-called none honda mechanic..lol..as for the elavation issue..i never pay any attention to this..as most atv's will run no matter what..and yes..your correct on a sticky float..this is what is sounds like to me..your not getting enough gas into your carb..my advice..remove the carb..remove any o-rings..buy some carb spray cleaner ( gum out works best for me )..remove all your jets..if you remove the air/fuel mixture screw needle from the front bottom of the carb..by all means..DO NOT LOOSE THE TINY WASHER !..also..thier is a very tiny o-ring down inside that hole..if you use a air compresser to blow your carb out after you give it a good spraying of the carb cleaner..make sure to dig this tiny o-ring out of the air/fuel mixter hole..or the carb cleaner will destroy it !..if i were you..i would inspect your jets..see if they are bright and shinny ?..if they are not..then this so called no-honda mechanic never over hauled your carb with new jets. before you put everything back together..check for fuel flow to your carb...make sure your getting a good flow to it..it never hurts to install a in-line fuel filter ( you can get one from any wal-mart in the lawn mower section )..these can save you alot of trouble down the road. keep us posted on how it does.To the ATV Gods I go with a question:
History- Bought a new to me TRX250 Recon Manual shift.
Estimated hrs is less than 30 and less than 200 miles ( the same as the foreman that I bought from the same guy which has an hr meter and odometer) I believe these numbers to be true.
Previous owners garage stored, drained gas after every season.
This one sat for about a year with no use before selling.
Idle was rough and not adjustable when bought.
Took to a non Honda dealer for carb clean and pilot jet adjustment
Dealer installed a #40 pilot jet stating it was jetted for about 6,000 feet now.
( Most of the riding I do will be at least 6k and up to 11,000 or so. )
Received bike back, idled perfectly, ran through rpm range perfectly started perfectly.
Took Recon and foreman to trail ride starting at about 9500 feet. About 2.5 hours drive to trailhead. Upon arrival, At trailer would not start. Would start then die, repeat and sometime did not fire at all. I adjusted the idle ¼ to the right. And started, eventually started idling nice though maybe just a wee bit high.
Foreman purred just like at home .
Went riding for a while, all was good. Went up a particularly steep section, Wife stopped and it would not start again for several mins. I adjusted carb back and forth a bit, finally started and ran great the remainder of the day with several steep sections, stopping and starting multiple times etc.
Got back home, would not start again. Every now and then it would fire and run for a second or two, but not for long.
Put it away to look at it today when daylight.
Things I’m considering-
Pull and look at plug to check running condition
Bad Fuel- The previous owner filled it with fresh fuel when I came to look at it, Mechanic said it smelled and looked fresh, I do have seafoam in there to try and fix the issue before I took it for service.
Operator error- Flooding perhaps? Should it start on inclines? Am I expecting too much to have start on inclines?
I’m by no means a mechanic and have a basic understanding about these things so your thought’s ideas on the possible problem and education about how I should perform a start sequence ( if just pushing the starter and applying a little gas does not work)
Thanks , Sorry for the long winded post