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Posted by: sugarhead
THis sound slike a typical case of coil or cdi crap out,bike gets hot,coil quits,bike cools down coil works.Gms ha this problem w starters.I would also check for air leaks on abike this old.when bike quits take plugs out ground it to cylinder dont touch the wire sears makes spark plug spark testers so does snap on.If spark is yellow,orange any other color then blue get a new plug if it still is ya have a weak spark which is most likely do to coil or cdi failure.if its blue timing good be off or engine might not be getting fuel or getting it in erratic manner.THis sounds like a coil failure tho let me know how ya made out an good luck.Nothing sucks more when ya itching to ride an bike is acting like a retarded ape gone bats.1 more thing when I went to automotive school I had proffessor tell class a little joke he learned when he was younger he use to say what do Ya get when U mess w the CIA/ya get F*CKed.His lil Formula was just that compression,ignition air leaks an fuel is last thing u check.he said guys always go for fuel 1st not even bother to check the basics then there whining bout it until some 1 points em in right direction hence the cia/F theory.
Posted by: sugarhead
if it dies when u go to put it in gear it sounds like the idle mixture screw or idle speed screw needs to be raised to compensate when load is put on engine by putting it in gear
Posted by: Bing
no fuel/slow fuel
Posted by: jaycekarl10
Well you certianly want to get the exhaust leak taken care of, sounds like the exhaust rings are in need of replacement. As for your fuel issue, I am not well versed in Tri-Z design, but may I ask, does any of your fuel system delivery (fuel lines) run near any part of the engine or exhaust before it reaches the carb? If not then it most definately sounds like a carb prob, but if a fuel line runs too close to the exhaust, you may be experiancing what's called vapor lock. It is more common in older cars, I found out the hard way when my motorhome did it in the hot desert. Essentially the fuel is evaproated before it reaches the carb because it gets too hot. It's a long shot, but one to check anyway.
Good Luck.
Posted by: nipper
hi i have an 86 tri z and after a few minites of bombing it around it will suddenly lose power and die on me!! n after a few minets of being left it will start up again and run for a few more mins!! i have cleaned all the cooling system and i don't think this is the problem as the temp light dosen't come on (temp light does work)!! HAS ANYONE HAD THIS PROBLEM? DO I NEED TO AJUST THE TIMING OR ANYTHING?
thx
nipps
Posted by: nipper
if it is the fuel pump then why would it run fine when its cool and start dieing when its been going for a few minets!!
i have taken the fuel pipe off that goes into the carb and when i kick it over it will gush out fuel!!
thx
Posted by: nipper
hiya
i set to work on my tri z this weekend and i clened the carb, spark plug, air intake and fule pump ect
anyways its all fine and the trikes working for a longer amount of time now but after a wile it still dies on me but when it starts to die if i pull the chock up for a few seconds and then put it down again it will be fine for another 10 seconds of the power band (its fine all the time when i don't rev it into the powerband!!) the fule pump works fine! although i carn't help but feel that the carbs float valve is too small!!
any ideas as to what the problem is?
nipps
Posted by: nipper
it won't die if i run it around without going into the power band and so its fine ideling!! there is a big gap between the exaust pipe and the engine (alot of smoke comes out around the front of the engine)!! could this cause the problem?
thx
nipps
Posted by: nipper
none of the fuel lines go anywhere near the exast or hot parts of the engine! fules definatly getting to the carb! would the gap in the exast pipe cause this problem? i heard that 2 strocks need back pressure or something!!?!
Posted by: nipper
when my tri z now does is it dies for 1/2 a second then jult back into life then die for another half a sec ect for about 10 times and then finally dies!! also if i pull the clutch in when it's dieing and just put the throttel on a little bit it will rev right up (it becomes very sensitive) the moment i try and put it into drive it will die!! if it starts to die i can keep it going if i keep it on quarter throttle and out of gear!!!!
thx for all your help
jc
Posted by: nipper
its fine normally with its clutch untill i've been riding it for a few mins then its throttle becomes very sensitive! and it dies
Posted by: Bulldog250R
plugged tank vent tube? I know this can cause problems with slow fuel etc on other wheelers---
Posted by: hondabuster
Sounds like carb problems to me...next time it quits running, take out the plug and check for spark. You could have a weak coil, and checking for spark will rule it out if you have spark.
Pulling the "choke" which is really an enrichener, richens the idle circuit, which means youre probably too lean. Does it only die if you try to let it idle? do you have any other symtoms?could the muffler be restricted?
Could be the mixture/air screw is out of adjustment, or float level is too low. Could be a plugged vent tube or gas cap.
Posted by: hondabuster
Yes the expansion chamber, helps the flow of gases in and out the motor. get that gap sealed up, and let us know how it works then.
Posted by: 660r70
check ur fuel pump un like other atc's an atv's ur tri-Z has a pump witch pumps fuel up to the carb i'm bettting this is ur prob. runnning outa fuel
Posted by: 660r70
if it is the fuel pump then why would it run fine when its cool and start dieing when its been going for a few minets!!
i have taken the fuel pipe off that goes into the carb and when i kick it over it will gush out fuel!!
thx
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Sorry for replying just trying to help
hope U figure it out
Posted by: atcpowermadman
hey it sounds likt your runnign lean an on the pipe it sounds liek a problem with jettign and did u take a compression reading yet? and does it loose power and then fall flat on it's face? well find out how much co mpression it has any where over 80 lbs should make it run and what about a crank leak woufdl cause it to run lean but it could also be a mainproblem since the fuel pump is run of fof crankcase pressure? check your crankcase for leaks by runnign a leakdown test and see what happens with that? i knwo thats what the problem wa son my 85 tri-z i had but mine was also highly modified.
