Tri-z hard idle help.

[Rigaman]

My tri-z just started idling very weird today. It idled great the past couple days. It hasnt been ridden much since a full rebuild. The piston is 70mm. Dg pipe. Everything else in the motor is pretty much stock I believe. This just started idling like this. I am running between 20:1 and 28:1 right now. It was 20:1 and there was about a half tank left, and I put in a gallon of 28:1. The book says brake in period should run 13:1, but I thought that was a little much.

Can anyone pinpoint what this idle sounds like? I have no clue why it idles like this. I think my jets are stock. So maybe I need to go up a few sizes because of the big piston and the pipe? But that shouldnt idle like that with stock jetting.

Here is a youtube video of the bike idling. I noticed not much smoke was coming out of the pipe. This was after a half hour ride. It smoked a bunch while warming up though. Not excessive, but a nice cloud. =) It seems like it is pretty hard to start now too. Even when warm. It started like cake before this ride.

http://youtu.be/bTBHpbmsVhs

[Rigaman]

Oh. One more thing. My kick start lever snapped right at the pivot. Like, clean snapped in 2 pieces.

Does anyone know if any other kick levers will fit on the tri-z? I dont think 200x will fit... But maybe Banshee? The 250r fits with a little modification. But it doesnt seat right when riding.

[IKE-Z]

Dirtface pointed me in the right direction when the same thing happened to me a couple months back. 250sx kicker fit right on for me.

[Rigaman]

Nice. Thanks!!

Cause the z kicker is expensive as it gets. And there is only one on ebay right now. For $100

What about the idle? That is a crazy sounding idle. It is not normal right?

[El Camexican]

Did you open the carb? If yes, what did you touch or do? If not was it running ok before this?
Did you do anything to the air filter recently? i.e. oil it up and maybe leave too much oil in it?
Did you change the spark plug? If so, did you set the gap correctly?
What oil ratio were you or the last owner using before the rebuild?
Where is your air screw currently set? i.e. how many turns out from gently closed?
How old is that gas you have in the tank?
Don't act on this next comment yet, but I'm thinking that if all the above checks out and you’ve been riding around slowly you may have so much oil in your crankcase right now that the air can't properly flow due to the volume of space the excess oil is taking up, so I need to know if you've revved it up yet (say half throttle and a good wide open blip) and if so did it idle a little better after that for a few moments?

[Rigaman]

Only thing I changed on the carb is I put a thumb throttle on. I had to pull out the slide, and it was idling fine after that.

Im not sure what the previous owner ran before the rebuild.. The gas is fresh, like that day fresh.

I have opened it up half throttle. Not much more though, but I was riding it pretty fast. It has full power. Just the idle isnt right. Maybe it is just too high, and when I lower it, it wont stay idling because the 20:1 mixture?

But I dont see much smoke blowing out of the pipe after it warmed up. But there is splooge on the silencer tip. The exhaust is a little leaky out of the head. When riding I dont see much smoke, but when I start it up it puffs out between the head and expansion chamber.

I have to check the air screw. I just got the trike. It was running perfect, so I didnt adjust anything.


I will check how it idles after a nice half throttle rip. I cant start it now anyways because the kicker snapped.

It was real hard to start warm.. So the plug is probably soaked with oil I bet. Or it was flooding.

Its like as I ride, it progressively gets harder to start. First 20 mins, I can kill it and start it right up. Then it gets harder and harder..

[El Camexican]

Put your hand (be carefull) by the exahust spigot and see if there is a lot of air coming out of there. That a bad spot on that engine. Forget a proper fix for now, just see if its blowing out air.

You say you changed the throttle. Did you make sure that you have free play in the cable throughout the movment of the handle bars? You need to be sure about that by feeling for at least 1/8" of free play in the cable play and hearing a nice crisp metalic click when you release the throttle. Was there a gasket in the carb cap and was it in decent condition? Take a look at your maniford as well, make sure its not cracked up and that the boost bottle hose is connected at both ends.

I'd empty the tank, measure the fuel that came out and add some straight gas to bring the mixture to between 32 and 40 to one and then put it back in the tank.

Set the air screw to 1-1/2 turns out and see if that makes it run any better after a few blips of the throttle and let me know what if anything changed.

[MTS]

Sounds like your air screw fell out, just adding, or a choke problem.

[Rigaman]

I'll check the air screw.

When you say feel for air coming out the exhaust spigot,you mean the silencer? Or at the head?

Ya. I made sure there is enough play in the cable. . The first cable I used, the cable housing was stretched, and there wasn't enough cable, and it revved up fast when I started it. So i had to use a different cable. The slide chunks down to the bottom now. If I bring the idle any lower it dies out..

[El Camexican]

I'll check the air screw.

When you say feel for air coming out the exhaust spigot,you mean the silencer? Or at the head?

Ya. I made sure there is enough play in the cable. . The first cable I used, the cable housing was stretched, and there wasn't enough cable, and it revved up fast when I started it. So i had to use a different cable. The slide chunks down to the bottom now. If I bring the idle any lower it dies out..

At the head

[TimSr]

The book says brake in period should run 13:1, but I thought that was a little much.

First step is to throw away whatever book you are using.

I know every internet genius has their own top secret break in procedure "used by all the pros", but Wiseco used to enclose a break-in instruction with each piston, and they directed you to run the same mix as normal, keep the RPMs low with periodic, occasional, brief full revs. It takes about 20 minutes run time to adequately seat rings on a two stroke. Retorque head nuts after heating. Then change the plug, and run it normal. Run it at high revs to clean it out, and then you can start to monkey with the idle, and start with the air screw about 1 1/2 truns out.

[Rigaman]

Awesome.

SO I gotta retorque the head screws, and run it like I stole it now. =)

I was under the impression I needed to be easy on it for like 3 hours. I do have a Wiseco piston and rings. So I can FINALLY rip it now.

I mean. The idle is annoying. But it still runs great. So I will get the old gas out. Put 32:1 I dont want to run 40:1 just yet. What do you guys think about ratio?

Also.. What oil do you use? I have spectro golden. Its a black bottle with gold letters on it. But I just ran out anyways.

Thanks guys!! I will go check the exhaust. I know air is leaking out of the exhaust head. Cause I see smoke when I start it puffing out. But it stopps after it warms up.

Does that make it run lean? I think with my bigger bore, my pipe, and stock jets, it might be running lean already.

[Rigaman]

The air screw was set at 1 1/2 turns

[just ben]

oh boy an idle thread turned into an oil thread. You have golden spectro, did you read the bottle at all? One bottle per 5 gallons which ends up being 52-53 or so to 1. 13:1 with that oil and I am surprised it runs as well as you say.I really am just about as sick of seeing stupid pointless oil threads as fabio is. I don't understand the arguement. If you use a cheap universal oil it will tell you to follow the mfgs. recomended... blah blah. If you use a good quality oil it says on the bottle what ratio to use.These companies spend millions on R&D on their product and is the reason they cost 2-3 times as much as the walmart brand. Sorry to rant in your thread but if you had taken 10 seconds to use the search key you would see why it would be better to just not bring it up

[Rigaman]

Golden spectro isn't that bad. It's all I had. It's what the previous owner used, and there was a little left so I used it. I didn't mix the whole bottle into a gallon. I mixed it 28:1. Ya. I read the bottle. My thread is an idle thread. If I use junk oil, or too much, it will effect the idle. Thats why I brought it up. Gimme a break

Edit:

Oh. You are saying golden spectro is good oil, and should be run at 56:1 like the mfg specs? I think I get what your saying. My bad. I just wanted to play it safe on the brake in. Your right. I should have searched it before dumped it in my tank. I just hear a thousand things from a thousand people, and its hard to tell what to use sometimes. I wasn't even asking about ratios. I just was curious to what the people who were helping me were running for oil. And if mine might be lean