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Post by stfocus on Nov 10, 2014 21:03:26 GMT 1
Right guys I've got a 250lc it's running like not so good it boge down when u set off u got to rev it a lot to set off and when u get it going it's ok but on full throttle it bog down really bad and u got to knock it down 1 or 2 gears and u off again so I took the cabs of and found that they r 4lo ones the main jet r 195 pilot r 22.5 and emulsion tube is 345p-2 and the jet needle is 4 from the bottom I'm thinking this is my problems as most of the sizes r for a 350lc and the jet needle is it the clip 4 from the top or 4 from the bottom and advice appricated and thanks
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Post by motorman1963 on Nov 10, 2014 21:31:41 GMT 1
Hi,
a new standard jet kit off ebay is £10.20 plus postage, fixed a similar issue with one of my bikes, YAMAHA-RD250LC-RZ250-CARB-REPAIR-KITS-CARBURETOR-2-REPAIR-KITS-CI-RZ250CR- item number 261638956409,
its one option,
Rgds
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dec1
L plate rider.
Posts: 30 
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Post by dec1 on Nov 10, 2014 21:43:44 GMT 1
Are you running standard air filter?
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Post by stfocus on Nov 10, 2014 21:48:36 GMT 1
All standard apart from a set off allspeeds the book says main 190 pilot 20.0 cheers
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Post by muttsnuts on Nov 10, 2014 22:40:17 GMT 1
be sure to jet it to the later spec 250 carbs as the 4L0 carbs are closet to those and not the early 250 carb settings, think the sizes you state above are correct for the later ones, so you should be good
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Post by stfocus on Nov 10, 2014 22:58:10 GMT 1
be sure to jet it to the later spec 250 carbs as the 4L0 carbs are closet to those and not the early 250 carb settings, think the sizes you state above are correct for the later ones, so you should be good Cheers dave what do u reckon on the emulsion tube on 345 p-2 be ok thanks pal |
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Post by muddyfox on Nov 10, 2014 23:00:19 GMT 1
i dont know about sizes for which bike, every bike is dfferent, what does the plug say? bog is nearly always lean, doest it sound raspy? or does it crackle? 4th from bottom is very rich, or some one it trying to mask a lean setting, i always jet from a base setting, get some fresh plugs do a run, do a plug chop, read plugs, thats the inner part of the plug, 4.bp.blogspot.com/-j0zzs4Ml8NE/TgNu2KPVUAI/AAAAAAAACt8/Z--jY0NwoDs/s1600/Spark%2BPlug%2BReading.jpgclip in the middle, check float height, start with pilot jet, get it to idle a little high, use the air screw to achive best idle, as in when you get to the point where turing the screw does nothing, more than 2.5 turns you need to go smaller, same when you get to mains, most bikes i have tuned have always had a rough transition going from pilot to mains, this is because they move the clip up or down the needle to conmpensate for bad jetting, get it  as for tubes and needles, this is where i started all-offroad.com/main/wp-content/uploads/2014/03/jet-chart.jpgdont listen to the book, ie: whats your elevation, humidty, octane of gas, whats your pump doing, lots of oil means lean mixture, when i do premix bikes, i jet for the ratio of oil. say 50:1 then jet hope this helps you |
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Post by stfocus on Nov 10, 2014 23:13:31 GMT 1
i dont know about sizes for which bike, every bike is dffereint, what does the plug say? bog is nearly always lean, doest it sound raspy? or does it crackle? 4th from bottom is very rich, or some one it trying to mask a lean setting, i always jet from a base setting, get some fresh plugs do a run, do a plug chop, read plugs, thats the inner part of the plug, 4.bp.blogspot.com/-j0zzs4Ml8NE/TgNu2KPVUAI/AAAAAAAACt8/Z--jY0NwoDs/s1600/Spark%2BPlug%2BReading.jpgclip in the middle, check float height, start with pilot jet, get it to idle a little high, use the air screw to achive best idle, as in when you get to the point where turing the screw does nothing, more than 2.5 turns you need to go smaller, same when you get to mains, most bikes i have tuned have always had a rough transition going from pilot to mains, this is because they move the clip up or down the needle to conmpensate for bad jetting, get it as for tubes and needles, this is where i started all-offroad.com/main/wp-content/uploads/2014/03/jet-chart.jpgdont listen to the book, ie: whats your elevation, humidty, octane of gas, whats your pump doing, lots of oil means lean mixture, when i do premix bikes, i jet for the ratio of oil. say 50:1 then jet hope this helps you Thanks for that dose make sense going go to a base setinng and go from there and thanks fof all the Info |
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