If not the intake, then what???

[BadBrad]

If it ain't broke, don't fix it!! Well, I've been putting off changing out the rocker boxes and when the front tire started showing thread and the gas tank liner separated, it was time to get it all done. It seemed like everything went fine until I fired it up last night. It's only running on the rear cylinder. Before I tore it down for the rocker boxes, it was running like a top. To isolate where the problem was, I shut it off, pulled the back plug wire and it wouldn't crank. I put it back on, pulled the front plug wire and it ran as before, piss poor on one cylinder. I pulled the front plug out, placed it in the plug wire and held it against the cylinder and it's getting fire. It was late and I was tired so that's all I've done so far. I'm guessing that the intake must be sucking air. Why else would the carb only feed one cylinder? I'll do a compression check when I get home, but since it was running great when I tore it down, it should be fine now. I put all new gaskets on the intake when I re-intalled it. Any ideas?????

 

[woodbutcher]

you sure you put the push-rods back in the front cylinder???? :roll::roll::roll::roll:

 

[RubWhore]

Hey Brad

Bet ya haint got the pushrods adjusted rite even suckin air the other cylinder will still fire
just run reel lean

PS Sandy Hook is rite around the corner.....You Goin???

 

[BadBrad]

I'll start by re-adjusting the pushrods. That would be the easiest fix. Sandy Hook? Why hell yes I'm going if Rocky is out of town

 

[Daddycool]

Same thing a few years ago happened to me. It was the pushrod adjustment.

 

[BadBrad]

Maybe the intake pushrod didn't seat properly in the rocker arm. I'm sure hoping so. I'll let you all know tomorrow.

 

[05chop]

If you think its the pushrod adjustment holding a valve open remove both spark plugs then with rubber tip air nozzle and shop air check for air coming out intake or exhaust at TDC.

 

[BadBrad]

Good idea chop! It must be open because if it was not opening at all, seems like I would hear the pushrod clattering from being too loose. A dog running on one cylinder sure sounds like shit!!!

 

[Daddycool]

It's been a while since I had the pushrods out but I am thinking they all aren't the same length. correct me if I am wrong.

 

[BadBrad]

Nope. All pushrods are different lengths, shortest to longest from front to rear.....I think. But I know they are all different and I was meticulous to lay them out and put them back in the same position.

My bad Daddycool. I though you said they ARE all the same. You're right!!! They are all different.

 

[Daddycool]

The first time I adjusted mine, the instructions the dealer printed out for me were wrong (from the BDM manual) and it drove me crazy. That was how mine got off. I got the S&S engine manual and they have the procedure right in there. Good luck!

 

[Five Five]

Hey Brad

Bet ya haint got the pushrods adjusted rite even suckin air the other cylinder will still fire
just run reel lean
QUOTE]

I agrees with Rub :2thumbs:

 

[BadBrad]

Thanks guys! I was about the pull the tank and re-seat the intake, but I took my time doing it when I put it back on and made sure everything was aligned. Adjusting the pushrods won't take long and should have me riding this evening. Thanks again. I'll update you all tomorrow.

 

[Daddycool]

If you need the complete S&S directions I can send them to ya. Just lemme know.

 

[BadBrad]

After collapsing, waiting and re-adjusting the intake pushrod, the bike was hitting on both cylinders when you revved the motor, but still running poor at idle. So, I collapsed, waited and re-adjusted the front exhaust pushrod and "walla", running like a scalded Dog and idle sounds great. Thanks guys. Like my old buddy Willy says, "On the road again".

 

[BadBrad]

If you need the complete S&S directions I can send them to ya. Just lemme know.

Daddycool, just what are the differences using the S&S method? I've always used the BDM method of watching one pushrod raise to its highest point and adjusting the same pushrod on the opposite cylinder. If the exhaust is open on the back, the the exhaust on the front has to be closed. Not sure what happened the first round, but doing the same procedure a second time fixed my problem. I would still like to see the S&S method if you have it. Thanks again all.

 

[Daddycool]

I guess what I was saying is the instructions the dealer gave me were wrong and I followed them to the letter. Droveme crazy! I'll go get my book and post the instructions. Give me a little bit. I think I did it your way and I went crazy. The S&S way has you do both pushrods on the same cylinder at the same time at TDC on the compression stroke.

 

[Daddycool]

Warning!
Always make sure you put the pushrods back in this order:
Longest-front exhaust
2nd longest- rear exhaust
3rd longers-front intake
shortest-rear intake

Installation:
1. Prepare the pushrod tubes and their new O-rings on your workbench.

2. Put the pushrod tubes, new O-rings and pushrods back in the position they came from during tear down.

3. Assemble the rocker box assembly as described in the Rocker Box section.

4. With the cylinder (the order doesn't matter) at TDC on the compression stroke, adjust the pushrod until it makes contact with the tappet. Then, put an additional four complete turns on the threads so the tappet piston is bottomed against the HL2T spacer and the valve starts to open.

Tip:
Incase your engine does not have the HL2T travel limiters, the usual adjustment is four complete turns and them allow it to bleed down.

Warning:
Remember not to turn the engine over until the lifters have had time to bleed down.

5. Repeat the process for the other pushrod and then allow them both to bleed down for at least 10 minutes

6. Loosen the pushrod adjustment until it can be turned by hand (see tip for non-HL2T motors) but some drag should still be felt. Then loosen the adjustment one full turn or six flats-and tighten the lock nut.

7. Repeat steps for the other cylinder.

If you have the non HL2T motor you dont need to loosen the pushrods after the adjustment. Just take it four complete and lock it down. then let is bleed down and do the other.

 

[BadBrad]

Thanks DC. I'm going to assume I don't have the HL2T motor because I gave my lifters 4 full turns and locked them down. Sure seems easier to find TDC just by watching the same pushrod on the opposite cylinder. Up until this last time, I've never had any issues adjusting pushrods using that method.

 

[Daddycool]

Your welcome.