Won't Stay Running/No Throttle Response.

[sh1bby69]

So I'm hoping you guys can help me before I just throw in the towel and take it to the dealer. Recently I have took the engine out and sent the frame for powder coating. Also I've taken the cylinder heads off to replace the grommets and seals and what not. I've finally assembled the bike but now that I have a fresh battery my bike won't stay running. It starts only with throttle twisted. But when I try to give it gas nothing happens. Once I let the throttle go it shuts off. Then occasionally it'll I can hear some popping or it'll pop and shut off. I can't figure out what's going on....

[Horsehockey]

How sure are you that you have the valves adjusted right?

[ritetwist]

Any chance you have the cables to the enricher and the throttle butterfly mixed up?
Shot in the dark, but I have seen it.

[bmweuro]

Originally Posted by Horsehockey

How sure are you that you have the valves adjusted right?

Originally Posted by ritetwist

Any chance you have the cables to the enricher and the throttle butterfly mixed up?
Shot in the dark, but I have seen it.

All of the above and do you have an intake leak?

[Uncle Pollo]

It's the last thing you touched.


Drats! ... that is everything!

Enricheners assembled backwards.

[sh1bby69]

You guys are awesome!!! I adjusted the valves accordingly and not the bike started up smoothly and has throttle response! Thanks!!!

[disston]

Just curious. How did your valves get out of adjustment? Did you adjust them incorrectly earlier? Or was the head off? Just what have you been doing that could cause this?

[sh1bby69]

I had the heads off. Its my first build or rebuild so im learning as i go.

[sh1bby69]

Can you tell me if my bike is sounding that way it should.

http://www.youtube.com/watch?v=b9q0b6_eZos&feature=plcp

[disston]

It's really hard to tell from a video on a small computer just what sounds one is listening to. I think that sounded OK.

[Rucksta]

Sounds about right on the PC as far as I can tell.

I think I'm hearing PCV valve and the gearbox rattle - both are normal
One will disappear when you pull in the clutch.
The other needs an upgrade top a later model reed valve but only if you don't like the turkey gobble noise.

Have you checked for zero axial float on the rocker arms?
I could be a bit tappetty.

Carbs can be swung in a bit at the top.
This will give you more room for your boots and prevent some of the Bing bite on your shins.

[Rob Farmer]

Originally Posted by sh1bby69

Can you tell me if my bike is sounding that way it should.

I bet you didn't shim the the end float in the rocker arms did you?

[sh1bby69]

I didn't shim the end floats. Is that's what is making the tapping noise or is the tapping noise normal?

[disston]

Originally Posted by Rucksta

Sounds about right on the PC as far as I can tell.


Carbs can be swung in a bit at the top.
This will give you more room for your boots and prevent some of the Bing bite on your shins.

I found it was the hose clamp screw on my left carb that my foot was hitting. I actually got a sore spot there. Moved the hose clamp screw to the top, instead of bottom, now I don't hit it, or it hit me.

[disston]

Originally Posted by sh1bby69

I didn't shim the end floats. Is that's what is making the tapping noise or is the tapping noise normal?

Later rockers have shims to eliminate the end float of the rockers. I think you just did a valve lash adjustment? And what needs to be checked and fixed is the up and down movement of the rockers. You don't have shims. You push the rocker end blocks together and hold them while tightening the cylinder nuts on top of the rockers. Sometimes you need to make a tool to hold this together or maybe little brother can hold them together while you torque the nuts.

This should have been checked when you adjusted the rockers but the way this stuff happens is you have to learn what is happening and we have to tell you stuff in little bits and pieces. Next time you set valve lash you'll check end play automatically.

The object is 0 end play.