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2005 250EX problem
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Posted by: Blue600

Went to start it and it would only start with the choke on full, it was 87*F degrees outside. I could rev it from half throttle and higher then it would die. It is getting spark but I'm leaning toward something wrong with the carb. What do you think?

Thanks

Posted by: BlasterEaten250

First of all, does it still have a warranty? If it does just take it back to the dealer you bought it from and show them what is wrong.

It could probably be bad gas, clogged airfilter, or clogged carb I would guess. Do you have any modifications such as a new exhaust pipe? If you do, did you rejet?

Posted by: Blue600

It's a year old and completely stock.

Posted by: Honda TRX250ex

Are you reving it up with the choke on? If you are the the problem. You shoulden't need a choke in 90 dreg weather.

Posted by: ryanh250ex

clean/re-oil air filter, install new spark plug, clean everything in your carb w/ carb cleaner, that should take care of your problem.

also make sure the 2 nuts holding the carb to the intake manifold are still tight. they can and do come loose from time to time.

Posted by: Blue600

quote:
Originally posted by Honda TRX250ex
Are you reving it up with the choke on? If you are the the problem. You shoulden't need a choke in 90 dreg weather.

I know I shouldn't need the choke but that is the only way it would start. I was revving it without the choke and then it would die. I won't get a chance to mess with it until next week. Thanks.

Posted by: Honda TRX250ex

Alright then let it warm up for about 10 mins. If it still does it clean the carb and air filter then put a new spark plug in it.

Posted by: MRJACK9

If you are talking about the first startup of the day, my 2002 250EX reacts the same way. Before warmup which takes a while, as the 250EX is very cold blooded. I have reduced the problem by opening the air bleed on the carb. 2 1/2 turns ccw from full closed and by replacing the stock battery with an after market. My stock battery, full charged would not maintain a terminal voltage above 9VDC, when cranking cold. Which is apparently marginal for spark and other electronics on the 250EX. If you are talking about a warmed up, previousily run that day in 87 F weather, you have other problems.

Posted by: Blue600

This was the first start of the day. It never did this before.