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Posted by: 2manytoys
You can go direct to www.kandnfilters.com. You can look at any filter they make. They have universal bolt on filters that you can match to your carb flange. Most 70-150cc atv's will have a carb flange of 1.5". So you would look for a uni filter with a 1.5" inner diameter then you pick the length and width.
Posted by: 2manytoys
Did you adjust the air screw? It may be sluggish now because the carb works on vacuum. Some of these smaller engines dont work well with aftermarket filters because it will lose vacuum. If you can find a way to modify the intake portion of the filter by making it longer this will help. A longer tube hooked to the carb then the filter attached will help or put some duct tape over part of the filter so it will cause more vacuum. Yes the stock filters are a joke and will ruin the motor in time.
Posted by: Raptorlegs
You may have to rejet the carb too, reconner.
Posted by: Fastestdad
Go up a couple of sizes on the mainjet and see what it'll do. Check your plug it may be a little lean.
Posted by: submakr
Good mod just keep the filter clean!!!
Posted by: submakr
Rconner,
You need to eliminate the airbox as well as anything that attaches to the carb inlet, the K&N will clamp directly carb inlet flange. I use K&N filter RU-0110 and pre filter RU-0210PK on my Kazuma 110. I got them both from Autozone for about $45. Good luck and don't forget to oil the filter!!
Posted by: submakr
Are you using a pre filter on your K&N? We run 3 K&N bikes in the sand and don't have a clogging problem all weekend!!!
Posted by: RAMTechRC
I took my K&N off the Yamoto,a nd went with a UNI. With all the dust in Arizona, I was getting too much into the carb. About 2 hours into the ride, the K&N was clogged and letting dirt in. The UNI seems to have more tolerance for dust.
Posted by: RAMTechRC
Yes, I have the pre-filter. Sand is larger than the dust we have out here. Hasn't rained for 96 days now, so that makes it worse. At the place we go, you can see the cloud of dust for 3 miles down the road.
Posted by: Kazooooma
I oiled and installed a new K&N on my son's Sunl 50 and it's running a bit sluggish since. The engine bogs a bit when you first hit the gas and overall it's not as powerful.
We had the older style filter and it was a total joke. Oily dust was visible in the carb inlet. The filter was a lose peice of foam, maybe 3/8" thick held losely in a circle. Inbelievable.
Posted by: Kazooooma
I tried turning the airscrew to the right and left but it didn't seem to help any. I may need to move the needle up or down.
Posted by: 1111
yeah i did the same thing for my sons 50 we went out in the rain yesteday and in some pretty big puddles and he had no problems just keep well oiled and dont dip in the water and you should be fine and you should e fine
Posted by: hadaveha
man i put a K&N filter directly on the front of my carb omg what a dif. man the thing runs great, a little worried about water, anyone ever got one of the k&N filters alittle wet
Posted by: hadaveha
i bought mine from the k&n site find the specks u need u have to have the dia. of the carb flange, and click on it and hit buy now. do u guys ever oil or put any grease on your chains man this thing is noisy
Posted by: reconner
so, for the kids' falcon 110, i'd measure the flange (which i assume is the tube from the carb to the black box containing the cheap foam filter) and order the filter and sleeve/cover?
once the parts arrive, i assume i simply remove the black stock airfilter box, install the k&n filter on the flange, and cover with the sleeve?
man, that sounds just way toooooo easy!!!!
Posted by: 2500HD
Where is the best place to find a K&N filter for the little quads (Arctic Cat 90).....a Polaris 800efi too while we are looking???? Thanks!
