Justintoxicated Posted May 8, 2007 Report Share Posted May 8, 2007 My 4 mil cub had an air leak the size of the hole in the Titanic...however, it still started real easy...idled fine, etc. You need to leak down test that bike before you go any further, or else you're just wasting time in my opinion. All the jetting changes in the world won't help you with an air leak or crank seal leak. One cylinder not firing until it warms up does not make sense...especially if the jetting is the same in each carb. You have bigger problems...and need to figure those out... Good advice there. Also check your ignition coil with a multi meter, Also if possible you might try swapping CDI's with a known good one. It could be electrical if your not getting proper spark. I had an old Ricky Stator 200 watt that showed spark etc all fine, but when I tested with the ohm meter one of the coilds seemed off. Called Their shop and they said the resistance was correct for their coil but it was causing some ported bikes to not run well (mine ran like crap and I went through plugs like mad untill they replaced it) It's either got be be Fuel, Electrical, or a leaky seal Thats about all that it can really be. Also you cleaned your pilot jets out with a strand of wire or something right? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted May 8, 2007 Report Share Posted May 8, 2007 SLD...if you want to buy a kit, this is a good one. This is Bob of R&B racing. I've seen/rode a few of his ported motors ...and he's a helluva nice guy. This is his ebay auction, he sells these kits. (The picture is for a single cylinder, but the actual kit includes what you need to do a twin...no worries.) I know a few people on this site have bought the kit and been happy with it. You could also PM him here, his name is machwon. http://cgi.ebay.com/ebaymotors/Banshee-Pre...sspagenameZWD1V Quote Link to comment Share on other sites More sharing options...
sldbanshee Posted May 9, 2007 Author Report Share Posted May 9, 2007 SLD...if you want to buy a kit, this is a good one. This is Bob of R&B racing. I've seen/rode a few of his ported motors ...and he's a helluva nice guy. This is his ebay auction, he sells these kits. (The picture is for a single cylinder, but the actual kit includes what you need to do a twin...no worries.) I know a few people on this site have bought the kit and been happy with it. You could also PM him here, his name is machwon. http://cgi.ebay.com/ebaymotors/Banshee-Pre...sspagenameZWD1V thanks so much man tomorow i have off all day so im going to clean the jets i have another shee frame with a cdi on there so im gonna swap em..also i got hotter plugs to put it in and im gonna test the power...and get the leak down tester hopefully all goes well ill let you guys know Quote Link to comment Share on other sites More sharing options...
JET 99 Posted May 9, 2007 Report Share Posted May 9, 2007 thanks so much man tomorow i have off all day so im going to clean the jets i have another shee frame with a cdi on there so im gonna swap em..also i got hotter plugs to put it in and im gonna test the power...and get the leak down tester hopefully all goes well ill let you guys know use b8es or br8es there should be no call or reason for a higher heat range plug.. your are changing the syptom by doing that... we need you to diagnose the problem by figuring out the actual cause not modify to get around the prob. your motor wont last and you will be pissed>>>>>>>>> :shoothead: good luck on it,jim Quote Link to comment Share on other sites More sharing options...
sldbanshee Posted May 9, 2007 Author Report Share Posted May 9, 2007 use b8es or br8es there should be no call or reason for a higher heat range plug..your are changing the syptom by doing that... we need you to diagnose the problem by figuring out the actual cause not modify to get around the prob. your motor wont last and you will be pissed>>>>>>>>> :shoothead: good luck on it,jim i cleaned the jets the reeeds look good.......i put in 2 new plugs started it up and both fired fine and i rode it around for like a half an hour and all seems good ill keep you posted a guy is coming over at 5 to do a leak down test Quote Link to comment Share on other sites More sharing options...
dawarriorman Posted May 10, 2007 Report Share Posted May 10, 2007 (edited) Despite what you may think, theres pretty much no way you need 30 pilots in there. Thats probably where your oil is coming from. Drop down your pilots back to stock, turn the air screws .5 turn out from all the way in. (and unless you have the airbox lid still on, 270 is probably too small) A hotter plug is a band-aid fix. It will keep you from fouling plugs simply because it lets the plug stay hot enough to burn off the excess. You are too close to stock tune to call for any plug other than an 8. Edited May 10, 2007 by dawarriorman Quote Link to comment Share on other sites More sharing options...
sldbanshee Posted May 10, 2007 Author Report Share Posted May 10, 2007 Despite what you may think, theres pretty much no way you need 30 pilots in there. Thats probably where your oil is coming from. Drop down your pilots back to stock, turn the air screws .5 turn out from all the way in. (and unless you have the airbox lid still on, 270 is probably too small) A hotter plug is a band-aid fix. It will keep you from fouling plugs simply because it lets the plug stay hot enough to burn off the excess. You are too close to stock tune to call for any plug other than an 8. the leak down test went well and i have pod filters on there.....the 270s actually run pretty well in there 300 made it way to rich.....but you are probaly right about the pilots....the 8s run well for a little bit but they evetually foul out...im buying the a leak down tester on ebay well i did it should be here soon....ill keep it posted Quote Link to comment Share on other sites More sharing options...
OnlyA2Stroke Posted May 14, 2007 Report Share Posted May 14, 2007 Drop that pilot down from 30 to the stock 25 pilot or go up to 27.5 depending on your air filter setup. check the crossover choke tube between the carbs and make sure your carb caps are screwed down tight. Quote Link to comment Share on other sites More sharing options...
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