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By Dra O
posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
-fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
-along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
-I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
-can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
-it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
-I THINK it has a mikuni model x carb - diaphragm is ID 26mm OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
-last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
-any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
By M C
A friend of mine has this particular 4 wheeler. It sat in the garage for about a year, so I redid the carb, cleaned the tank and installed a new petcock. So far, it cranks right away whether its button started or pull started. So I have a couple of questions concerning the carb and air filter.
1. Is this a cvk32 250 or 350 carb? As the air fuel ratio adjustment is different according to a cvk document I read. What's your adjustment setting? 2 whole turns and a 1/8 or 2 whole turns and a 1/2? Comparing the old setting on the carb to the new setting (and where the needle sits now), makes me think it was way off before.
2. The Air filter cover, gasket, air filter and plate element are all missing. So I was thinking of removing the hose that goes to the air box and put one of those K&N style looking filters and be done with it. So my question is.. will I have to readjust Air Fuel screw or just adjust Idle?
It's just going to be driven around the neighborhood.
Thanks in advance for any info or help. Y'all stay safe out there!
By Ted Craig
I know a lot of people say not to use anything but Oem. For the sake of the those who chose not to, or the OEM part cost more than the project, lets hold back negative comments.
I just purchased a carburetor that is supposed to be up to OEM specs. The company has a good reputation on eBay and Amazon. The Carb is supposed to be for this bike and jetted exactly.
This question should basically go under carb adjustment. I installed the new carb, the bike idles fine. On throttle it sputters half the time and the other half it will rev up fine. Does this sound like the needle is set at the wrong point? Does it sound like the main jet is the wrong size? Or is there another adjustment besides the air/fuel screw thats is 2 turns out?
Yes i could truck through old threads and possibly find the answer, but i thought it would be nice to have one tailored to new carb installs.
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Im working on a old 1987 honda 125 4 wheeler in the school shop. It will start by getting pulled by another 4 wheeler but wont start with the pull start or Electric Start. When you pull start it it tries to start but when you try the electric start it just turns over but doesnt even act like it wants to start. The spark plug is dry and it shoots fuel out of the back(air filter side) of the carb. Weve had the carb off twice and it is complety clean. What are some things we can try?
I bought a Honda 250sx 1986 but the exhaust is broken. Apparently it's not possible to order a new one. I checked to order one on others compagny but there's noting.
Do you know which exhaust it's possible to install. Is there a company who sold an exaust to fit on my 250sx.
Sorry for my english
Hope someone can help with this one.
We took our 1984 Honda TRX 200 to the shop and they had it for about 2 weeks before they finally called and said that they had cleaned the carb and changed the battery and that it had started up.
We went and got it and when we got home it would not start so we called them, they said bring it back in, so we did. They called us the next day and said they changed the spark plug, and that it was running. We went and got it again and it ran when we drove it off the truck.
We parked it for about an hour because we were going to get ready to go on a ride. Well, it wouldnt start again.
So we called them and they said the last thing they could do was order a new CDI box and put that on. I decided to just buy it myself, so I didnt have to pay them labor again. We put the new one on today and its still not starting.
Does anyone have any ideas on what we could check to see what in the world is going on with this thing?
Please and Thank you
ok it will start up an run but quits a lot till it gets warm, but has a bad miss an wont idle, I have a brand new Honda carb on it, good gas flow, new plug, but when I let the throttle go below a quarter, it backfires through carb an tail pipe:confused: so it has never had any electrical work or mechanical work done...it just started all the sudden, I'm think it may have ignition coil breaking down, or cdi box going bad...anyone had this trouble before? let me know what you did to fix it. thanks:skeptic:
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