woodro77 Posted January 5, 2007 Report Share Posted January 5, 2007 (edited) i just totally rebuilt my motor , 50 over , weiscos , v force , fmfs , k+n no lid, +4 timing, slight porting , stock carbs with vitos jet kit ,300 main, needle middle clip,air screws 1 1/2 out. took it out , ran good for a little while 30 min. then would bog and stall , then would start up and run good ,and then after a little while happen again , thinking maybe its jetting , the vitos needles are longer i think , are these jet kits any good ? does this jetting sound close , i live in new york (sea level) if it was jetting wouldnt it run crappy all the time ? jet kit says for pipes , k+n no lid came with 300 and 290 mains , maybe better with 290 , what do you think? Edited January 5, 2007 by woodro77 Quote Link to comment Share on other sites More sharing options...
dajogejr Posted January 5, 2007 Report Share Posted January 5, 2007 I think the Vitos needle are much like the Dynoport, longer, 6 grooves instead of stock 5. Put the needle in the 4 clip down from the blunt end. Jet kits are a joke.... With the lid off, as long as the porting isn't too drastic, 300 main is about right, especially not that it's getting colder. Try a 27.5 pilot jet. Time to check the odd ball things, new plugs, fresh gas. Cleaned out carbs. Then check electrics....OHM the stator and coil, if you can, swap CDIs with a friend. Most of the time, if a bike runs fine until it gets really hot...it's electrical. make sure the vent in your gas cap is working too (Check ball). No dirt in the screens for the fuel valve... If ALL of that checks out, time to do a compression and leak down test to check the internals.... Quote Link to comment Share on other sites More sharing options...
woodro77 Posted January 6, 2007 Author Report Share Posted January 6, 2007 blunt end , you mean top? will that richen it ? cdi checked ,(i have spare) stator is good, ( shop bench tested it) carbs clean. 138 each cylinder , new plugs Quote Link to comment Share on other sites More sharing options...
dajogejr Posted January 6, 2007 Report Share Posted January 6, 2007 Going towards the blunt end leans it out, toward the pointy end richens it up. When the bike starts running bad, do you start out with new plugs? When it runs bad, how do the plugs look immediately after? Compression seems just about right, albeit a little high if it's a stock head. Time for a leak down test to make sure you don't have an air leak somewhere...although, doubt it...gotta check. Leak down test it cold and warm if you can (yeah, I know...don't burn your hands on the pipes taking 'em off). If the motor is sealed properly, it's either bad electrical somewhere, or...poorly jetted in one spot or another...and it's loading up the plugs from being run in that spot. But you said it runs good for 1/2 hour....that sounds like electrical to me.... If two CDIs both did the same thing, I'd eliminate that. However, I've heard of Stator's ohming properly...but being bad... For a cheap thrill, replace the spark plug end caps with some NGK ones, I think they're only 5 to 7 bucks a piece. Stock coils are known for having bad caps.... Quote Link to comment Share on other sites More sharing options...
woodro77 Posted January 6, 2007 Author Report Share Posted January 6, 2007 leakdown test is good , 6 pounds for 6 minutes i think , plugs looked reddish brown , is that ok ? switched coils too i think its the jetting , maybe loading up,, i will try the clip , and maybe try the 290 mains forgot , air screw was 2 out , went 1 1/2 and was a little better , vitos kit came with bigger pilots than stock i think 27.5 Quote Link to comment Share on other sites More sharing options...
dajogejr Posted January 6, 2007 Report Share Posted January 6, 2007 Easy way to tell. Put brand new plugs in, ride it till it starts to run like crap. Remove those plugs and put brand new ones in, if it instantly starts running perfect again, then it is loading up the plugs. If not...you have a problem elsewhere... Reddish brown? No...should be a tan or light cardboard color. I think you should leave the 300 main in...In my opinion... Put the air screw .5 turns out once it's warmed up fully. Then go 1.0 turns out, wait 20 seconds for the new adjustment to take place...ride it again. You want the highest idle possible by adjusting the air screws.... Less than 1 turn out, you need bigger pilots. More than 2.5 turns out, smaller pilots. I'd probably say with the airbox and no lid, you could use either the stock or 27.5 pilots... Quote Link to comment Share on other sites More sharing options...
woodro77 Posted January 6, 2007 Author Report Share Posted January 6, 2007 im going to try that ill let you know , thanks for your help Quote Link to comment Share on other sites More sharing options...
woodro77 Posted January 11, 2007 Author Report Share Posted January 11, 2007 i have tried everything cant get this fucking banshee running right , today i am buying a set of after market carbs , suposaly set up for my machine , and if that doesnt work im burning this hunk of shit to the fucking ground , (will post pics of the fire) rebuilt this complete quad, everything brand new and this is how that bitch treats me ? i hope it works or im getting a 4 stroke !!!!!!!!! Quote Link to comment Share on other sites More sharing options...
moneybags Posted January 11, 2007 Report Share Posted January 11, 2007 (edited) Dose your Banshee still have the T.O.R.S on it? If so unplug the black box under the gas tank and see how she runs. Edited January 11, 2007 by moneybags Quote Link to comment Share on other sites More sharing options...
woodro77 Posted January 11, 2007 Author Report Share Posted January 11, 2007 Dose your Banshee still have the T.O.R.S on it? If so unplug the black box under the gas tank and see how she runs. tors is gone , , i have tried everything , at the end of my rope Quote Link to comment Share on other sites More sharing options...
adventurebound Posted January 11, 2007 Report Share Posted January 11, 2007 The bogging then stalling part does not sound good if it is a fresh build. Perhaps it was seizing. removing the pipe and looking into the exhaust port may give some clues. Hopfully it is somthing else. Kai Quote Link to comment Share on other sites More sharing options...
dajogejr Posted January 11, 2007 Report Share Posted January 11, 2007 tors is gone , , i have tried everything , at the end of my rope I'm sure there are some NY HQ brothers and sisters that can help. I know Ellison445 is in the Bronx area, boonman is in that area too... There has to be something overlooked that another pair of eyes won't hurt... Quote Link to comment Share on other sites More sharing options...
woodro77 Posted January 11, 2007 Author Report Share Posted January 11, 2007 The bogging then stalling part does not sound good if it is a fresh build. Perhaps it was seizing. removing the pipe and looking into the exhaust port may give some clues. Hopfully it is somthing else. Kai i dont think its seizing , compression is the same every time i check it , if it was seizing the comp would change ? i will try the new carbs and see what happens , i think it is the carbs Quote Link to comment Share on other sites More sharing options...
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