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Post by TRHOD on Mar 16, 2005 4:49:57 GMT -5
I've notice over the years the foreman, upon startup, particularly when colder will hesitate. What I mean is if you slam the throttle open it will cutout, but if you ease the throttle it will go pretty good, maybe a little sputter. Once you get it moving it will run good, and once it is warmed up it runs well, but still has a little hesitation if you slam the throttle open.
I've always run 87 octane gas and started recently always putting fuel stabilizer in the tank. I've even started running a carb/injector cleaner about every 4th tank. Change the plug every year, cleaned and reoil airfilter every year (this year bought a new filter).
I was thinking, maybe, I was having problem with the small jet in the carb.
Any thoughts would be great? Thanks
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Post by HondaForemanNo1 on Mar 16, 2005 8:12:07 GMT -5
Same happens to mine. Its just something about it being cold. After she's warm, I never have any problems.
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Post by Jake on Mar 16, 2005 15:58:22 GMT -5
First of all, stop choking it with all that garbage in the gas. 87 is all it wants. Maybe the stabilizer, but only if you're sure that you'll be storing it a couple of months or more. Stabilizer burns like ass on a good day, and if carb cleaner really could dissolve fuel sludge out of your carb, it would also be very effective at dissolving the fuel line between the tank and the carb, as well as the tank it's self for that matter. Odds are that that carb cleaner is a very little of some solvent (enough to say so, not enough to dissolve anything) added to mostly methyl alcohol (or if it's "fuel injector cleaner", then isopropyl alcohol), which soaks up water. Water being the absolute number one reason that people think their carburetor (or fuel injectors) need cleaning. If it worked like they say it'd ruin your bike for sure.
*For a cheap experiment, go to a parts store, buy a can of aerasol carb cleaner (A mediocre fuel deposit solvent at best) and two small rubber O-rings. Fill the cap from the carb cleaner with carb cleaner, and drop in an O-ring, saving the other for a control. The results will be self explanitory, and you'll see why you can't add that sort of thing to a fuel system that may contain rubber hoses and seals.
Note also that either type of alcohol will "lean" your fuel mix to some degree above and beyond any other mechanical conditions, varying of course with the concentration that you add it to the tank.
Do you have a fresh plug in it? For two bucks it's a cheap guess, and if it's been there a while, fuel addatives will leave a buildup on it.
Are you comparing winter to summer? You bet you'll get a bit of extra hesitation when it's cool out, because the cooler the ambient air, the leaner the mix is. The colder the engine, the less it cares for a lean mix.
Are you talking about over time, not worried about the seasonal differences? Often that'll be accompanied by an occasional backfire on decel. It's because pipes rot out from the inside out over time (especially with lots of 'joy juice' spooged into the gas tank), and leave you a little lean on the pilot circuit. Turning the pilot jet (idle mix screw) out just an eighth of a turn, give or take, usually can straighten that out.
Chokes can get crummy from mud and water finding it's way down the cable. Make sure it feels good when you open and close it. They're a little sloppy right from new, so be honest with yourself before you condem that.
I'm not sure how "fussy" you're being, but seeing as it's winter, does the bike tend to sit for a month, then get ridden? If that's the case, you can expect that the compression will be down just a bit until the oil gets "worked" back into the cylinder wall. That's a pretty normal condition, although not really too severe, most people don't even notice. If it acts up today, go smack it around a little, till it's good and hot, then put it away. If you start it again tomorrow and the problem doesn't present its self, then that's the most likely candidate.
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Post by MuddnMason on Mar 16, 2005 16:08:16 GMT -5
You know Jake, that is an excellent explanation, and welcome back, havent talked at cha in a while.
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Post by TRHOD on Mar 24, 2005 2:59:52 GMT -5
Jake,
Thanks for the thorough response.
Basically, It sounds like it's just the nature of the beast to have the hesitation till it warms up. Just wanted to throw this out and see what kinds of responses I got.
TRHOD
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Ezrider
Sergeant
TBF Member
Posts: 89
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Post by Ezrider on Mar 24, 2005 19:43:10 GMT -5
When I sold my 99 450, I had a 2002 450 settin next to it, I was not using the stock muffler on the 2002 so I put it on the 99 450......before I had changed the mufflers the 99 had acted very close to what you are talkin about, it ran much better with the new muffler on it, so the old 99 450 muffler must have been about 1/2 stopped up.
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Post by Jake on Mar 25, 2005 12:45:48 GMT -5
That sounds like about what mine has done as I "think" the pipe is all stopped up and change it, but a litttle "after the fact surgery" on the pipe found that the old pipes had minimal mud blockage because there was no internal structrue remaining to hold the mud in. Also, where I discovered the cause of the tinny sounding exhaust rattle at certain RPMs. Anyway, that's kind of why I lean towards lean, but who knows.
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