You have got to be kidding!!!!

[weazel]

Ok, well some of you helped me out in the past trying to get my ATC 70 running. I never did get it to run. So I decided to just buy the 88cc upgrade kit from Dr. ATV. I have to say this kit was nice.

Got every thing installed again and ready to start it up. Pull and pull and pull nothing AGAIN!!!! It would fire and die right away and then nothing now I cant even get it to fire.

I bought new points and condenser for it and had the coil tested. I gapped the points correct and double checked it with the light method. All seems good... I still have intermitent spark so I'm starting to think the pick up coil is bad or something.....I have no idea...Timing is correct and I double and triple checked everything.

Should I go to CDI??? What the heck can I do to get this thing running??? Please help me....

[oscarmayer]

could be a bad plug wire or coil.

[Louis Mielke]

try a spark plug first

[Thorpe]

Got a small blockage in your fuel line? Petcock screen dirty?

[weazel]

Well even before the upgrade kit, I bought 4 new plugs. I'm on my 3rd one and put a new one in right after the upgrade.

My other thought was the head...Could it be that it is not pulling enough gas into the cylinder???

[adamd]

im bout to start wondering if somthin in my valves could be causein the problem on my 200x it ran like a new one then my airscrew fell out of the carb got a new one n all it does is spit sputer bog pop wht ever u wana cal it past about 1/4 throttle but it will ideal all day and when its in nutral i could set with it wot all day if i was dumb and did that it proly would

[CRAZY70MAN]

Check voltage and continuity out of and to the coil???? How did you set points?? Clip and recheck plug end cap and wire at coil. Sounds like carb or fuel issue though?? All is tight, no leaks?????? get a piece of paper to set points, put strip of paper in between and rotate flywheel,,,,,, when it starts to pull out, look at alignment mark........... good luck... keep us posted
:w00t:

[NewfieBish]

haul the plug out and put it against the engine case, haul it over and look at the plug, if its gettin a nice constant spark, its not fire; its the gas, even if your timings off, you can tell this, id haul the carb apart and blow it out with a compressor. alot of bikes dont start after a rebuild n such because of really simple problems as such man, i wouldnt think much of it!!

[Erics350x]

Try unhooking the kill switch. If that doesnt work replace the pick-up

[weazel]

Ok, I set the points with the paper and I seem to have a stronger spark than before. I did get it to pop off for about 5-6 fires and it dies everytime. I cant get it to run any longer than that. I set my idle air screw to 2 turns out and played with the idle adjustment screw. Nothing made a difference. So I dont believe it is a spark problem. I am leaning more to the head not pulling enough gas into the cylinder. Not sure if my valves are leaking or not.

I'm leaning towards a new head or at least a head that came off of a running machine.

Any other thoughts or am I way off with this thought of getting a new head.

Thanks for all that have provided input

[Louis Mielke]

Will it fire and run when you spray carb cleaner directly with no carb attached? Like if you keep spraying to keep it fed?

[weazel]

that is something I have not tried... I will let you know

[Dirtcrasher]

^ Uh Oh........ I picture a 45 second long run of carb cleaner :D with flames :lol:

[weazel]

^ Uh Oh........ I picture a 45 second long run of carb cleaner :D with flames :lol:


Well at this point I almost would not mind this thing going up in flames. But I have way to much money into it. I basically rebuilt it from the ground up and replace a lot of the parts. That is why it is so nerve racking that it will not start.

Really if there is anyone in the Twin City Metro Area of MN that wants to come by and help, that would be great.

[Louis Mielke]

^ Uh Oh........ I picture a 45 second long run of carb cleaner :D with flames :lol:

Desperation my friend, desperation. I really figure its the carb and not anything else on the engine. If it will run off carb cleaner then we've eliminated just about everything but the carb. Course why am I telling you that? lol

[300rman]

hmmm....your focused on the electrical too much.....sounds like a carb issue.

[weazel]

hmmm....your focused on the electrical too much.....sounds like a carb issue.

Your right LOL,

Well I managed to get it to run for about 5 seconds tonight. WOOT!!! Anyways, I have narrowed it down to the carb, I double checked the timing and was 1 notch off. After I changed that is when it ran for 5 seconds, but after that I could not get it to do anything but pop a few times.

I bought a China made carb and I'm wonder if that is some of the problem. I have been messing with my needle settings and the low and high screws trying to find the right combo. If anyone needs to know it is a 19mm carband I have a 68 main jet in it. The carb originally came with a 78. Maybe I should switch back...

Anymore thoughts??

[weazel]

Ok fellas, I've been playing with the carb and I have been able to get it to run for about 5 seconds and then it just sputters out. I pull and pull and I can get it running again for about 5 seconds. After a few rounds of this just a few sputters. I was reading the Jetting thread on this site and after reading it the main jet should not have anything to do with it starting. That should be the pilot screw. I have tried starting this about every 1/4 turn and nothing makes a difference. Any further suggestions???

[Louis Mielke]

I would like to think the pilot jet is either too small or is clogged. What size engine was that carb intended for?

[junkster]

valves out of set ///

[weazel]

I would like to think the pilot jet is either too small or is clogged. What size engine was that carb intended for?


Not sure what it was intended for. They just say it fits a ATC 70. It is one of those china (actually Japan) made carbs from Ebay. This is the carb I bought

http://cgi.ebay.com/ebaymotors/LH-CHOKE-19MM-HONDA-CT-70-90-MINI-TRAIL-CARB-DAX-SX-XR_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1171Q7c66Q3a2Q 7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a 1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem4 00045992607QQitemZ400045992607QQptZMotorcyclesQ5fP artsQ5fAccessories

[Thorpe]

Ramie... Try your keihn carb that came with the trike... You wont even need the throttle cable, just run the throttle by hand...

[weazel]

That is my plan this week Darrin, I just misplaced my stock intake tube. It is somewhere on my work bench. LOL. I did get it to run a bit longer, but would just sputter out then nothing as usuall. Darrin I will keep you posted on the stock carb and thanks again for taking the time out of your weekend to talk to me a few minutes.

[mohadib]

hmmm....your focused on the electrical too much.....sounds like a carb issue.

The little icon of obama showing my IP addy and what not is weak and miss-leading.
What exactly are you trying to say? I use Firefox and Debian Linux (Lenny) and I'll tell you my IP anytime. So what. What are you going to do? And how would you stop anyone else from doing something? Using some crapy proxy service? lol. Use TOR or onion routing. It doesnt matter anyway. Its like saying.. OMG I KNOW YOUR ADDRESS. Good for you winnar. Hope you scared a few newbs

Cheers,
dib

[factoryX]

The little icon of obama showing my IP addy and what not is weak and miss-leading.
What exactly are you trying to say? I use Firefox and Debian Linux (Lenny) and I'll tell you my IP anytime. So what. What are you going to do? And how would you stop anyone else from doing something? Using some crapy proxy service? lol. Use TOR or onion routing. It doesnt matter anyway. Its like saying.. OMG I KNOW YOUR ADDRESS. Good for you winnar. Hope you scared a few newbs

Cheers,
dib


wow really? are you upset that he is using something so simple as a small joke? Or are you simply trying ruin a good thread by pointing out that he is using something simple like a small joke for his SIG?:banned:

[mohadib]

wow really? are you upset that he is using something so simple as a small joke? Or are you simply trying ruin a good thread by pointing out that he is using something simple like a small joke for his SIG?:banned:

Im not trying to ruin a good thread. Just sig spam, and it could be scary to the uninformed. Whats the point of it? Anywho, as you where!

:D

[Cottonwood]

This was a good thread until a few posts back, getting just a bit off topic:wondering ...sorry I don't have any help for you on your 70 but I cant wait to find out how you fix it and get it going...I'm on the edge of my seat here, lets hurry it up some! :lol:

[torker]

Well, try something simple.
Fire the engine with the GAS CAP off the tank.
I know sometimes they'll go bad and wont allow enough fuel for the engine to keep running. It's cheap (read free) and easy.
TORKER.

[weazel]

Well I have tried it with my gas cap off and nothing either... So I took Darrins advice and put the old carb back on.... Nothing... not even a pop.. I checked spark and it is great.. Still something with my dam carbs...... Anyone have one off a running machine that they know is good?? Grrrrrrrrrr

[Thorpe]

There isnt a blockage in your exhaust is there?

[weazel]

Nope I redid and painted my exhaust.... I had the spark arrestor out and cleaned that also.... then after words I took compressed air and blew threw it

[1985BigRed250ES]

I would say take the carb apart and give it a good cleaning. run a piece of wire through the little holes in the jets and put it back on the trike. give that a try. If that doesnt work, I would go through the entire fuel system. tank, lines, filter(s) and fuel valve.

[weazel]

Ok, I tried my stock carb and I could not get it to pop off at all. I took the carb off and sprayed gas right into the intake. It would pop but sounded like it was coming back out of the intake. I put the carb back on and sprayed gas into it. It would start and run for a few seconds. Ok time to take that carb off again

I decided to check my timing one more time. I noticed my timing chain seemed loose. So I checked the tensioner and noticed that the screw was not even tight. I adjusted the chain tension. I'm sure this had something to do with it running funny and not wanting to start

I installed the new carb again and pulled it over.. It fired off with in a few pulls and ran for about 10 seconds. I choked it again and it started again. After a few more rounds of this it idled for about 30 seconds then just died. Got it running again and decided to touch the throttle, it died instantly...

So I was wondering what could be causing this... Could the idle jet be to small??? why would it die right away when you tough the throttle???

[weazel]

Sorry had to bump just once

[max]

Your not getting enough gas. That is why it dies when you hit the throttle.
You need a bigger carb or you need to rejet and change clip location on needle.

[weazel]

Well the carb is the recommended size for this upgrade. So my thought was the pilot jet, but I'm not sure if you can get bigger ones of those.... I have the clip on the 2nd slot from the top of the needle. I will move it down one and try that... I have got to be getting close!!

[weazel]

I just was informed and actually forgot myself that the needle is for the midrange on these carbs... So back to the pilot screw...Hmmmm.

[max]

You should still raise you needle and try it. Then try a bigger main

[Thorpe]

Ramie-- I was looking for this thread and thought it would pertain to the 70...

http://www.3wheelerworldforums.com/showthread.php?t=55086

[weazel]

Good read, Darrin, thanks for finding that thread. I'm going to read it more thoughly tonight... Who knows there might be something in that read that can help me out.

[weazel]

We have Ignition!!!!!! I finally got it to start and idle!! I was so excited... I had one more plug left and figured what the heck!!! Even though the other one was brand new since my rebuild... What do you know it fired right up on the first pull.

I'm just having a issue with adjusting the carb now. It idles fine and will idle all day if I wanted it to. My issue is the idle to mid range. I have to feather the throttle and gently apply it for the RPM's to come up. I have messed with the needle from the top notch to the middle notch and it improved a little bit. I'm wondering if it is just simply my pilot screw?? I talked to Darrin and he gave me some suggestions to try, but I just thought you all would like a update...

Finally after months of pulling out my hair I'm so close to having it up and running for my daughter!!!! She was so excited to see me on it for the whole 15 feet I could ride it, before it died. LOL Yeah!!!!!!!!!!

[oneroom42]

hey weazel, what did you do to get it to run? you didn't really say. i had a prob bringing mine up to high rpms. if i would punch it it would die. i knew it was the timing but i checked the point gap over and over and it was right on. i ended up pulling the flywheel and noticed there was no key in the crankshaft to line up the fly wheel with. so just make sure the flywheel is lined up with the key on the crankshaft or a correct point gap will not even matter. hope this helps and if not just wanted to make you aware of the possibility of that little key falling out when working on it.

[weazel]

All i did was change to a new plug, even though the one in it was new... First pull and it fired and ran until I killed it by touching the throttle... I was getting spark on the first plug but it must of been either intermitent or weak.. Not really sure..

Like I said just have to fine tune the carb and I should be good to go.