turbowrenchhead Posted August 7, 2013 Report Share Posted August 7, 2013 After I got my bike dynoed I took it up upper Wisconsin for some trail riding. There was much water on the trails and I got a lot of water and dirt in the intake and then it acted like a lean run away and didn't want to return to idle. I cleaned everything up, went through the carbs, even pulled the head to make sure the pistons looked ok and they did. Bike ran great after I went through it. I had also put the 340 mains in it from the 350's that were decided at the dyno. Dyno guy said to try the 340's with the air screw at 1/2 out trying to get it to pull sixth gear with a 15/40 sprocket combo. I replaced both sprockets a month ago because I bent my rear sprocket hub. So I went with a 14/39 and a newer style rear hub with 6 spokes. I left the 340's in because my next trip was to west virginia with a higher elevation. The first two days the bike ran great, however there was much water on the trails and I went real slow through them because I knew that I would get water into the intake. After two days it started doing the same run away idle. So I pulled the box and carbs off. I had no compressed air to work with so I sprayed out all the circuits with brake clean. There was traces of dirt lining the intake runners too so I cleaned them all out. I washed out the foam filters with gas and dried them off. I only had 2 cycle oil to re-oil the filters with so I applied about a 1/2 oz of oil to each filter and rang them with paper towel. I went to there local hardware store and tried to fabricate something to go over my air box opening to keep water and dirt from getting into it. I used a piece of plexiglass to form a tee pee roof over the air box. I tried to keep as much of an opening to the box as I could but the bike didn't like the air restriction at all. The bike still had somewhat of an runaway idle but not as bad. Probably because I couldn't clean the carbs out properly with compressed air. So when I got to an area where there were no puddles I pulled it off and ran the bike better without it. I ran the bike real hard on long open dirt roads. After 10 minutes of that it locked up the tires. I got a tow back and I tore it down. Both pistons suffered a lean burn down to the point that it melted the top of the pistons down to the rings on the exhaust side. I contacted CFM and they said that properly oiled foam filters with outwear covers should do the trick. The dyno guy said get rid of the air box completely and go with a K&N and outwear directly on the carbs. What do you guys think? I have another trip coming up Sept 6-9th and there will probably be water on the trail again. Quote Link to comment Share on other sites More sharing options...
turbowrenchhead Posted August 7, 2013 Author Report Share Posted August 7, 2013 The box came with a drain hole. When I rode water would land right on the pods in the air box. As soon as enough got into the carbs the idle runaway would start in. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 7, 2013 Report Share Posted August 7, 2013 Those CFM airboxes are turrible. Water fills them up like a swiming pool and the filters sit in the water while it slowly drains out. Doesn't help that the intake tubes pitch towards the motor, so once the filters are in the water they suck all the dirty water thru them as well as rinsing the filters of all their dirt. Then that cocktail of crap gets pulled thru the carbs and motor. Also 2-stroke mix is not the same as filter oil. So once you started riding, it doesn't take long for the oil to run out and off of the filter. Then you "dust your motor" from pulling unfiltered air thru it. Ditch that airbox (it hinders power as well) Just run twin pod filters and outterwears. Quote Link to comment Share on other sites More sharing options...
BeeCanBanshee Posted August 7, 2013 Report Share Posted August 7, 2013 Nothing is going to solve the water issue unless you run a sealed airbox. Pods would be worse than the cfm and a stock box with no lid would be better but still get water in. Quote Link to comment Share on other sites More sharing options...
Nightmare Posted August 8, 2013 Report Share Posted August 8, 2013 It sounds like you just need to stay the fuck away from water:lol: Sent from my SGH-T679 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 8, 2013 Report Share Posted August 8, 2013 Nothing is going to solve the water issue unless you run a sealed airbox. Pods would be worse than the cfm and a stock box with no lid would be better but still get water in. Closed box is safest, but even mild mods are hindered by a closed box. As for a Pods being worse than the CFM box.....No. Pods shed water like off a ducks back. If you splash them hard the motor can die.....but a few minutes later you can kick it over fine. With K&N filters and Outerwear's, even if they get wet, they aren't going to protect the motor. The CFM box is just a bathtub with filters in it. It kills power on higher modded bikes and really does more harm than good as a n air box. I rode the entire length of the river at The Badlands in Indiana with Pods and Outerwear's. Try that with a CFM box and you will be cleaning carbs and rebuilding top ends like the OP. Quote Link to comment Share on other sites More sharing options...
Deadbeat Posted August 8, 2013 Report Share Posted August 8, 2013 anybody run a K&N powerlid? all that filtered surface area looks good..does it restrict compared to no lid at all? Quote Link to comment Share on other sites More sharing options...
BeeCanBanshee Posted August 8, 2013 Report Share Posted August 8, 2013 I have no experience with k&n pods but my uni pods get soaked and stay like that til you let them dry out. So I just avoid water all together. Quote Link to comment Share on other sites More sharing options...
turbowrenchhead Posted August 8, 2013 Author Report Share Posted August 8, 2013 I don't blast through deep puddles. I like to fly over the shallow ones though. I actually have a set of foam pods, just need to get the outwears for them. What oil is recommend for the pods? Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 8, 2013 Report Share Posted August 8, 2013 I don't blast through deep puddles. I like to fly over the shallow ones though. I actually have a set of foam pods, just need to get the outwears for them. What oil is recommend for the pods? Your foam pods are sponges. Great filters for fine dust....not so hot for water. If your going to run a pod configuration switch the the K&N filters. I don't know of anyone running foam with Outerwear's I think the foam oil will just goober up the Outerwear's. Quote Link to comment Share on other sites More sharing options...
special06shee Posted August 8, 2013 Report Share Posted August 8, 2013 I use stage2 uni filters with outwears. I would never use anything else. Paper filters in general are JUNK! Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 9, 2013 Report Share Posted August 9, 2013 I use stage2 uni filters with outwears. I would never use anything else. Paper filters in general are JUNK! If I was blasting in the fine coal dust you would find me running foam filters too. Quote Link to comment Share on other sites More sharing options...
turbowrenchhead Posted August 9, 2013 Author Report Share Posted August 9, 2013 I use stage2 uni filters with outwears. I would never use anything else. Paper filters in general are JUNK! Do you have a part number or ebay listing for the stage 2 uni's and outwears? Quote Link to comment Share on other sites More sharing options...
turbowrenchhead Posted August 9, 2013 Author Report Share Posted August 9, 2013 I found some uni brand foam cleaner and oil on ebay so I ordered it up. I may try both setups. Have a k&n for drier conditions and a foam setup for wetter conditions. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 9, 2013 Report Share Posted August 9, 2013 You got that backwards. .....but maybe 4:20 is kicking in a little early today. LOL Quote Link to comment Share on other sites More sharing options...
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