bike wont run, help!

[Chevy1500z71]

im building a blaster right now and its got an lrd pipe, reads, porting, and an old 34mm round slide mikuni that came from a snowmobile. my problem has to be something to do with jetting since i don't have a clue were to start. what it does is it will run as i kick it and die once i stop kicking it, in the idle position. it smokes really bad as i do this so it must be really rich. it wont do anything at all in any other position but idle. i changed the 310 main jet for a 240 main and it still does nothing when i give it throttle. the pilot jet is a 55, could the pilot jet be the problem? when i hold it full throttle and kick it it doesn't fire, but it doesn't smoke either, but i doubt its lean becasue it did the same with a 310 main. something must be wrong other than jetting? or maybe im just way to rich all around? im normally good at jetting 2 strokes and i know what im doing but iv never started with absolutely no starting point before so i need to know what its going to take to get m in the ballpark so i can start fine tunning.

i got a video of what its doing to help understand my problem



in the video, when you see me reach over to the left fender its becasue i have a primer over there that just dumps fuel in down the intake since the carb has no choke.

 

[blasterman312]

have you checked your reeds?

 

[Chevy1500z71]

have you checked your reeds?

they are brand new vitos dual stage reads. maybe i installed them wrong? they don't require you to re use those stock reed stops do they? im pretty sure the reeds are fine. the whole bike was just built with new piston rings, reeds, spark plug, gaskets, and it was ported.

it gets spark fine.

 

[cirame1]

i would definatly start at the basics make sure your ignition is on and bike son run. check spark and make sure you got good air going in and nothing blocking it or cutting it off. then check compression could be a broken piston.

 

[cirame1]

if the bikes an 03' or above check your tors wires b/c it wont start if u have the ebrake tors wires plugged in and no ebrake on it and the throttle wires usually need to be spliced i just delt with that on mine for a while it wouldnt start.

 

[blasterman312]

try taking the plug out and just kick it over several times, then try it.

 

[Chevy1500z71]

you guys crack me up. the bike gets spark, that should be enough said to realize that i don't have any kill switch or tors problems. it makes fine compression, it has brand new rings, and nothing is broken, i just put the motor together. its looking liek im just going to have to buy a new carb since i cant seem to get any help on any of the 4 forums iv posted this on, all the replys i get are "is your tors removed" lol. is there any function on the bike that would retard the timing of the bike? i have the tors twisted together at the carb and and it removed at the throttle end. the park break thing is just hanging there, but like i said, i get spark so its all fine electrically... unless there is a function that would retard the timing?

thanks for trying to help out guys.

 

[Chevy1500z71]

try taking the plug out and just kick it over several times, then try it.

been through all that stuff. its just dripping gas out of the exhaust its so flooded, but when i cut fuel to the carb and just start it on carb cleaner it still doesn't want to run, normally a 2 stroke will fire on just air and carb cleaner from my experience... something aint right and it may go further than just the carb.

maybe ill pull the 36mm off of my golf cart and see if it will run on that, even tho its jetted for a 500cc non reed motor, it should still run on it.

 

[Chevy1500z71]

ok, my buddy keeps his stock blaster at my house, and hes outa town so i borrowed his carb and it still doesn't run on a stock carb, it does better, but still wont actually start up and idle and run properly. so it could be 2 things, either i put the reeds on upside down(dual stages, wrong stage first maybe?) or my bargen 80$ port job wasn't such a good deal after all?

 

[ron89]

its prolly flooded pretty good .. did u try turning off the gas and cranking it over with a new plug see if any thing happens?...

 

[Chevy1500z71]

its prolly flooded pretty good .. did u try turning off the gas and cranking it over with a new plug see if any thing happens?...

yea, of course, iv been through all that

so i put the stock reads on from my buddys bike and still no fire. i put the 34mm carb, dual stage reads and spacer on my buddys stock(stock other than an lrd pipe) blaster and it ran great. yet nothing will run on my bike? im thinking it has to be the cheap ass porting?

 

[Chevy1500z71]

ok so from what i understand 03 has somewhat of an ecm, can someone explain to me how exactly it functions and what sensors does it use and how they should be properly bypassed. thanks.

 

[ron89]

how does your plug look ?.. idk i think if the porting was bad i am sure it would still fire it would just run bad .. if your plugs are coming out wet turn the quad over and crank it over and let all that raw fuel come out ..

 

[89custom]

ok jesus christ people WATCH THE VIDEO AND READ WHAT HE RIGHTS. am i the only one that does that?

its trying to start, i can hear it in the video, it kicks over and runs for about maybe 10 rotations of the crank and doesnt keep going. that could mean something with the reeds.

ignition and spark is FINE because it trys to start. compression seems to be ok like you said and because the fact it wants to run. did you get a reading of how much compression exactly? i trust you saying it has plenty but it could also be compression. rent a tester and get a reading. will help. unless you know for SURE that you can feel it has alot.

about the cheap port job, that could cause some issues. who did it? and what did they tell you they did to it? like what kind of porting and cleaning?

try a new plug because this was happening to me, similar not exactly, it would want to start but it wasnt firing right. you said you have spark, but it could be weak, messed up spark so get a fresh plug. thats all i can think of.

so new plug, make sure reeds are in right, get compression mesurement, and find out or explain about the porting job.

 

[blasterman312]

its trying to start, i can hear it in the video, it kicks over and runs for about maybe 10 rotations of the crank and doesnt keep going. that could mean something with the reeds.

If its the reeds, I'll be ROFL!

but they're probably broken already cus their vitos....lol

 

[ruthless_one3k]

check and see if the flywheel has moved on the crank. if the woodruff key is sheared it may have slipped a bit and that would make it out of time

 

[89custom]

check and see if the flywheel has moved on the crank. if the woodruff key is sheared it may have slipped a bit and that would make it out of time

cant be. when it fires, first of all its firing, secondly it sounds normal its not all missfiring and timed wrong

 

[Chevy1500z71]

iv had the keys on flywheels shred on me on other motors, its a totaly diferent problem that goes along with that, my timing is fine. as for the reads, they are fine, the bike does the same on a set of stock reads and my buddy's bike ran great with the vitos reads and the 34mm carb and read spacer, but once i put the stuff back on my bike, no fire, same goes for the stock carb setup. i have a compression tester, ill test it tomorrow but it has brand new piston rings so i doubt its got bad compression. its nice having my buddys perfect runnign bone stock bike siting there for testing parts, iv ruled out the carb and reads for sure.

 

[Chevy1500z71]

and i guess ill swap the plug tomorrow, im stumped, dont know what else to try! i mean, its a 2 stroke, all i need is compression, spark, fuel and air, iv got fuel air, and spark... and i should have compression too, so wtf is wrong!

 

[bundyho1]

did you check the tors?I didnt read through all the posts but if its not the reeds then remove the tors.Unplug the throttle sensor and the sensor on the carb and then the EB sensor (remove the front plastic piece and just disconnect the connectors for the throttle and the E brake sensor).If its a newer model i also jumped the wires together at the carb.