Injectors

[njloco]

Take it out and check it.

 

[Cooter]

So it idles and runs OK, wants to lift the front wheel in 3rd and... wait, whats the problem?

I would bet the house it's not a 1350. Possibly a 1250, slightly possible a 1275. I imagine NHRS keeps engine numbers on file and worth a call.
AFV at 75!?! Thats lower than most AFV limit settings(!!)

 

[cocoabutterlover]

So it idles and runs OK, wants to lift the front wheel in 3rd and... wait, whats the problem?

I would bet the house it's not a 1350. Possibly a 1250, slightly possible a 1275. I imagine NHRS keeps engine numbers on file and worth a call.
AFV at 75!?! Thats lower than most AFV limit settings(!!)

It wouldn't be a nhrs kit but good call I will check that regardless. Yeah so when I did the leaky injector test I couldn't see that well into the throttle body to tell if it was leaky or not. I think I will order a new set of injectors since the engine is coming out for a gasket and cooling fan swap soon.

 

[mike lowary]

These are 60lb injectors. If your injectors are not stock, It will be obvious when you look at them.

 

[34nineteen]

These are 60lb injectors. If your injectors are not stock, It will be obvious when you look at them.

The NRHS cylinders have their logo cast into them. At least mine did.

 

[mike lowary]

The NRHS cylinders have their logo cast into them. At least mine did.

All 3 sets of my nrhs cylinders had Dans logo. Only the 1170 jugs didn’t. They have zippers logo

 

[Cooter]

Dang Mike, those injectors are:
!!


Not sure what gaskets you mean Cocoa, but putting in a new fan is super fast if you hang the rear of the bike and pull off the rear shock. 1/2 a beer job. Don't forget to put in a new O2 sensor while you're in there, The Lords of Irony demand it fails right after you put in a fan, LOL.

 

[Sdrxb12s]

Damb cooter is that miss april 1987

 

[34nineteen]

Mikey’s little monster motor. That motor is going to be hella fun!

 

[rb70383]

I have a follow up question to injectors. I'm in Canada, and I have no Credit Card so online ordering is limited (and very expensive with cross border orders with taxes).

Is there a source that people know of that's accessible in Canada? H-D dealer said they were no longer procurable.
But I read online a Ford injector may work but it never clarified which model year and type. OR where I can actually order the Siemens injectors from.

*Engine Background* Allegedly bored out to about 1350cc, not sure if previous owner changed to large injectors or not but last fall my AFV was at 75% on last check. The ECM allegedly has a custom tune done to it as well, with K&N intake and Jardine can. Intake seals have been replaced. It's just that it doesn't feel like it has as much oomph as it should and the AFV of 75%.

I'm in Wa, We could meet on either side of the border fence and toss parts up and over....:eagerness:

 

[njloco]

What fence ? Just hand it to him. With the exception of boarder crossings, there is no fence.

 

[cocoabutterlover]

So quick update on my AFV 75% saga. I removed the injectors 4 weeks back without removing the throttle body. Everything in there was covered with road grime. I had the injectors cleaned (flow test and pattern test not completed, not available locally) and then they were reinstalled. I started the bike and hooked up buelltooth and the bike sounded better, no backfiring off throttle, AFV was now 100%. My brother had to test ride the bike because I was in a vehicle accident breaking bones on my left side. When he did the road test he said the bike bogs down past 30% throttle position. Can rev freely in neutral and reach red line below 30% throttle positioning. Now I did walk him through the tps reset from my hospital bed and he is mechanically capable. Still bogged down. At the moment I still can't do anything on the bike yet but am looking for input.

-recheck install of velocity stack and injectors
-check fuel pressure when I can
-reset tps again

Thats the three routes I came up with.

There was a previous post about a guy having this issue at 1/8th throttle but the outcome was never posted on the forum.

If all those don't yield any results, I will just wait until the bike gets tore down to replace gaskets, and then verify if it was bored out or not and dyno test if it was bored out. But that's further down the line, and assuming I don't get laid off during this sh it.

 

[outthere]

Air horn installed correctly?

 

[cocoabutterlover]

Airhorn being the velocity stack? That's on the list to check. But I'm 1 to 2 weeks away from being able to do that. I'd be happy if it ends up being something that simple after all this

 

[34nineteen]

Yes. Some people have reported that the velocity stack/air horn not being fitted correctly caused driveability problems. I would have not guessed that to be an issue, but apparently it is.


Some people will use a large zip tie to help compress and hold the spring clamp. It can be a bear for a single pair of hands.

 

[outthere]

The part that's juked is the rubber that butt's against the air cleaner hold down. It has an upper and lower portion. One flap underneath and the other on top.

 

[cocoabutterlover]

Yeah I usually keep an eye out for that too to make sure it's properly sealed. But I will have a look at the stack first and hope I find something became loose as it was put together.

 

[Cooter]

On the airhorn... inside the TB there should be NO gap between the rubber and the throttle bore and yes it has two seals, one above and one below the airbox base.

Some people will use a large zip tie

Some people will use a large tool:

:applause:

If the AFV is at 100 with an even close-to-correct fuel map, and the bike is bogging under hard acceleration, it can be a sign of a weak or compromised fuel pump assembly. Tee in a gauge and see what it does under hard acceleration. Should be a rock solid 49-50psi.

 

[KickerDRB]

An easy way to deal with the airhorn clamp. Slip a pair of small nutdrivers or very small sockets with an extension over the ears and squeeze them together. I could never get the ziptie trick to work, or any set of pliers, visegrips or channel locks to hold without slipping.

 

[cocoabutterlover]

Update: the velocity stack got loose and moved up to cut the air flow off at a certain pressure. Fixed that. Buddy rode the bike h jome, I still haven't rode it to verify first hand if the ijnjector cleaning did anything.
https://youtu.be/ARQGlH3ucMQ
https://youtu.be/PmOrYO_jJpE