Your’s should be slightly darker than this imo. Atc atc250r 1984 250rWiseco pk1074 honda atc250r atc 250r 1981-1986 66.25mm 2 stroke piston kit No reserve: 1981 honda atc 250r for sale on bat auctions. Plug 1 in the chart below is ok for a street bike but slightly lean on the main for a dirt bike. Sell honda atc 250r atc250r atv carb/carburetor 1986-86 new in miami. HOW LONG BEFORE PLUG GETS MEANINGFUL READABLE COLORĪs mentioned it can take up to 45 minutes in my experience so doing a reading on a new plug that only has 5 minutes time on it can be misleading but obviously that’s the only option one has. Outer metal plug ring = clean with no build up and lite color, black is rich on pilot. Honda 250r rebuild kit 1985 engine atc 1986 end motor machining service Buy honda 250r oem 1986 gas tank trx250r trx fourtrax fuel in orange Sell atc250r enkei oem rear rims wheels cst tires. Porcelain = at least 75 % of it lite to medium tan.Įlectrode = will hopefully follow the porcelain color and also have no deposits. My method is the same used by the Kawi factory MX racing team and most other professionals I know which in general is the following: PLUG COLOR - In the interest of avoiding possible plug reading bedlum I suggest you simply use the chart in the link at the bottom of my post as a guide. Check plug and do further jetting according to my plug color. PLUG CHOP In your particular case ONLY, I would jet as I suggested then install a new plug, ride it moderately from all rpm’s for 15 minutes then inspect plug, if it's nearly white jet up 1 more size ride for 15 minutes then run at WOT in 5th gear up a slight grade if possible for 3-4 seconds, then kill eng and quickly pull clutch lever in. It is safer to start rich then jet leaner. Plus if your cylinder is not port dimensions are not the same as yamaho225dr, your jet sizes my need to be different than his anyway. ![]() ![]() My guess is its a 36mm which seems small as most 250 cc 2 strokes are 38 mm carbs so I don't know whats going on there. Most owners manuals will give the carb size in millimeters in the carb specs. Since your carb is not orig I would start with 3 sizes larger on the main and 1 on the pilot jet. They were popular in 32,34,36 mm sizes in that model which I know doesn't help you figure out what size it is. anyone know where to get a 147 main jet for it? or are they universal for 2 stroke carbs? Im probably going to buy a full fmf exhaust system and i was wondering what jet i should upgrade to, the stock one is 142, im probably going to remove the airbox tooits not the stock carb, it says OEM STD on the side.
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