having some wierd bike issues

The English translation of this is "you need to clean the small filters above the float needles". That's what I've also been suggesting to Matt. Have you checked this out yet Matt. Or are you sure that it's the missing linkage spring that is your problem?

 

"so now it will surge while trying to maintain cruising speed"

That's telling me your lean at cruising speed. The links below have some good carburetor information that would help you. I believe at your cruising throttle position your using the pilot circuitry and possibly a little of the slide/needle for the AF ratio. The last link you will have to scroll down the page to the carb section. The 3rd one shows how to find your throttle position and what circuit your using.

Motorcycle Carburetor Theory 101
http://users.rcn.com/kochc/moto/carb/carb.html
Find Motorcycle Engine Carburetor and Jetting Problems - Tech Review - Motorcycle Cruiser
Sabre/Magna FAQ v2

"i even pulled the plugs out there normal redish brown color "

You can not read plugs that way. First off the unleaded fuel used today does not color the porcelain insulator of the plug. The only way that happens is if an additive is added to the fuel by the owner. Or your using race gas with lead in it. Some racing unleaded racing fuels will put an additive in just to color plugs also. You have to read the color change in the shell base, bottom ring of the plug and the ground electrode. New they are shiny. When burning correct the base ring should be dis-colored 3/4's of the way around and the electrode should do the same about 1/3rd from the tip. You can only really read plugs if they are new, then take your vehicle out and do a WOT thru the gears holding it WOT, then quickly shut down with out idling of powering to a stop. Pull pugs then read them.

Hard to tell by the plug photo's because they are fuzzy. But they do look like the total ring and electrode is dis-colored. Shows your very lean. They dis-color with heat. Hope this info helps.

 

no i think thats might be part of the problem but not the whole problem

 

how new is your fuel filter? check it for bubbles when the engine is running. may have a tiny hole in your fuel line or somehting like that. My bike did the same thing for a while.. it would sputter and start to loose a lot of power like it was running out of fuel and then mysteriously come back to life. it was real embarassing in traffic. i replaced all the fuel lines and the filter and the problem stopped. i would check all the simple stuff like that before tearing your carbs apart

which spring are you missing? i have a few extras laying around

 

its the the two sycn springs for the butterflys FILTERs we dont need no stinking filters , i'm not running one

 

One of the times I had put mine together I was missing one or two of those, and let me tell ya, it WILL run like poopoocaca. Without those springs in there, the associated throttle plates will be free to move A LOT, and not stay where they should be, relative to the "master" carb.

All of the times I had mine back together, I had them so far out of sync that it was basically idling on 1 cylinder. I had done a "bench sync" before putting them one, but that wasn't close enough. I ended up using those springs to my advantage, and adjusting the three "slave" carbs so that they move about the same distance when pushed shut, through the carb inlet (past the slider and needle.) THAT was a HUGE improvement, and actually using the carb sticks to sync them made it just a little better (I was surprised that only one of them was very far off! The other two one took a little adjustment, maybe 1/8 turn!)

I would not mess around with it until you have all 4 throttle plates working together, then get them as close to the same as possible.

 

aight i'll check in my shed for those springs and let ya know somehting. your talking about the little ones on the sync screws right?

 

I'm happy there is a thread now on the intertubes with the word: "Poo-Poo-caca" in it. :smile:

 

Just to clarify - the 86's are not supposed to have a filter, they came that way from the factory. They run a gravity feed system and all (that I know of) Honda carburated bikes afterwards ran a similar setup without a filter.

 

here matt is from manual

 

Good to know.

 

Matt: any news?

Jamie: Can I ask what bad can happen from adding a Fuel Filter to our setup?

 

You could restrict the flow of fuel enough to starve the engine. This all depends on the type of filter, how clean it is, etc. Can I assume that you are considering adding a filter to your bike? If so, why?

 

I'm not really....someone I know with a rusty tank is cause they keep getting jets clogged.

People are telling him to add a filter and I'm saying he shouldn't.


I also have a slightly rusty tank but I don't think a filter would help.

 

i dont know lets ask the squirrel man



squirrel man any news?

 

WHY did you remove the cable holder and idle screw??????

I need it to synch throttle plates !

Your carbs are very clean except for the rust from your fuel tank.

somehow a filter should be engineered into the system b4 fuel gets to carbs, and your tank needs a flush, clean, and a coating to prevent future filth.

 

i removed the cable holder to make it easyer to remover the throttle cables but i did touch the idle screw...so you say the idle screw is missing? ill over night you the cable holder...i am sure you saw those two sycn springs missing as well where you able to find some?

 

So what is the problem with yur bike?

Are you gonna try and incorporate a filter inline?

Doesn't the Petcock have a filter in it plus the little condom thing?

 

found some screwed-up stuff: filthy inlet filters that were blocking fuel flow, inconsistent and inaccurate float settings, loose screws, (of course) missing springs...... as squirrel man has said...as for the filter probably not tank is getting pretty clean once of the crap is out of it there will be no reason to run a filter....no the petcock has no filter in itself but there is one that rests in the tank or rest on the petcock...bought some more 110 octane so once i get all my stuff back in i'll going to take it to the dyno!!! see if it will put down a better number than 29.8 hp:frown:

 

110....geeeze.


Glad everything is better though.