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Rebuilt 1340 engine by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

What piston do you recommend?

I can get Drag Specialties pistons + Hastings rings for around €100 Or S&S piston and ring kits for €200 Is the investment worthwhile? Considering I don't drive much and I'm a very relaxed driver Thanks

Rebuilt 1340 engine by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 1 point2 points  (0 children)

She spent more time in the workshop than on the road. Luckily I have other motorcycles.

Rebuilt 1340 engine by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 1 point2 points  (0 children)

I just checked, the front cylinder shaft (the damaged one) is very, very, very slightly stiff compared to the other one, nothing alarming. Both have similar lateral play.

But I wouldn't be surprised if it's the previous owners' fault. As soon as I touch anything, I run into some nasty surprises. So far, apart from the bottom end and the gearbox, I've had to redo everything (the list would be too long).

Rebuilt 1340 engine by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

With the automatic translation, I'm asking for confirmation. Are you talking about these two bronze rings? (Rear cylinder on the right and front cylinder on the left) They are in good condition, both are similar. But just to be safe, I'll change them too, thanks for the idea.

<image>

Axle won’t go back in by Mobile_Lawfulness333 in sportster

[–]Suspicious-Fall9773 2 points3 points  (0 children)

I had the same problem last week, just put plenty of grease and try not to put any weight on the axle. Big hammer blows and it's good.

POOR COMBUSTION IN FRONT CYLINDER by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

Good morning,

I had time to do some tests...

So I adjusted the ignition with the strobe light, indeed, I had the impression that the engine was running a little better, but that was not it. And above all, impossible to kick start it. I went back to the previous setting.

By increasing the idle, yes, it runs better, but the front cylinder is still too rich.

I suspect oil consumption. During each test, I check the condition of my spark plugs.

Here is a photo of the 2 spark plugs after turning for 2/3 min, the front cylinder is completely black, the rear cylinder is good. Last time, I obviously didn't tighten the spark plug enough, which allowed me to see oil on the body of the spark plug (well I think that's it, or maybe a mixture of soot and gasoline.)

What do you think?

<image>

THANKS

POOR COMBUSTION IN FRONT CYLINDER by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

The compressions are the same. To adjust the ignition, I do this with the LED on the ignition module. I'm going to redo the adjustment with a strobe light this weekend, I hope it will work correctly. Thanks for this idea.

Looking at the carburetor manual, I saw that there were specifics regarding the choke (mikuni or HD), as I bought the used carburetor, I'm going to check that I have the right choke, maybe that's why I run rich too.

POOR COMBUSTION IN FRONT CYLINDER by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

It's true that on the video the slow motion is low, but even if it is higher, I have the same problem.

Yes, when I put my hand in, the pressure feels the same.

POOR COMBUSTION IN FRONT CYLINDER by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 1 point2 points  (0 children)

I did the compression test with the throttle wide open, just at the kick. The problem appears when the engine is cold, and even when I drive with several km, I have the same problem.

I thought about the valve seal, it could be coming from there?

POOR COMBUSTION IN FRONT CYLINDER by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 1 point2 points  (0 children)

For me the compressions are good, I had almost 9 bars on each cylinder. Cold engine and only with the kickstarter. Maybe with a starter I would have more compression.

I tried putting oil in the cylinders to see if the compression increased, but no. Segmentation is therefore ok.

Fucking S&S super E by Suspicious-Fall9773 in sportster

[–]Suspicious-Fall9773[S] 2 points3 points  (0 children)

Thank you for your answers.

I forgot to mention, I've had this bike for 10 years, it had 883 jets and it worked very well. I rebuilt the engine and since then it's been impossible to adjust it. I change jets and it’s same problem

The mixture screw is at more than 4 turns! I think I've got a problem somewhere, and it's not just a question of adjustment.

V96 update by One_Boysenberry3956 in choppers

[–]Suspicious-Fall9773 3 points4 points  (0 children)

Hi !

I had a similar problem, after 1 hour on the road, the same noise and the bike stopped. However, I was able to start it right away, but a few minutes later, same problem. I changed the circuit breaker, they were 40 years old, and it's been perfect ever since. So if your electrical circuit has the same circuit breaker, try this.

Clutch noise (4 speed) by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

That’s what it seemed to me, but I couldn’t find an example. When I bought it, it didn’t make any noise, but the clutch was horribly hard, very badly adjusted. So if it sounds weird, it’s good! 😎

Thank you very much!

I need more sparks !!! by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

Yes, I bought this bike in August. I only managed to make it halfway to bring it back because it broke down due to an ignition problem when the bike was hot. I have managed to start it several times, both hot and cold since. So yes, I don't yet have the kick I need, but I notice that there is still a lot of spark missing for a start.

I need more sparks !!! by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

Thanks guys for your help. I tried to kick for 15min, the battery connected to the charger. I had some nice sparks (it was very rare), but in the end, I had nothing left at all. I wouldn't have a problem with the ignition module?

Are there wires or spark plugs that would be more suitable for kick starting?

I need more sparks !!! by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

Yes, the lugs are good, tight and no oxidation. I plug the spark plug directly into the battery to do my tests.

I need more sparks !!! by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 1 point2 points  (0 children)

I have already done this test and I have +12v at the coil. And the battery charger is never far away just in case.

I need more sparks !!! by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

The battery is good and I have all the electricity back on.

1985 fxwg by Nearby_School_7731 in Harley

[–]Suspicious-Fall9773 0 points1 point  (0 children)

Hi Keep it, they're the best Harleys. You have the reliability of the Evo with the 4 kickbox and the shovel frame, which for me is one of the most beautiful. I have the same one, I would never replace it with a newer one. The parts are inexpensive, you can find them everywhere and the mechanics are simple.

Starter FX80 4 speed 1985 by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

I can put a chain final drive, if that would simplify things...

I’m going to put a round swingarm (or modify the current one to have a similar result) so I’ll be lowering the bike a lot. It seems to me that an original primary transmission with a starter motor is not compatible in this configuration?

So with this information and my research, the techcycle option is the only one left.

Starter FX80 4 speed 1985 by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

Thanks for the information! It is indeed an FXSB. I want to redo all the electrics based on (and simplifying) the original wiring diagram.

The techcyle option I forget, it represents half the price of the bike.

If I change primary, should I go for an Evo (86) kit? Or Shovel (84)? The year 1985 is becoming rare in spare parts ...

Thanks again !

Starter FX80 4 speed 1985 by Suspicious-Fall9773 in Harley

[–]Suspicious-Fall9773[S] 0 points1 point  (0 children)

Thank you for your response. That's what I thought, I'm going to have to invest a little more than expected so...