3rd gear, 6,000 rpm = 90 mph?

[Incubus]

Or do I have an issue with my tach?

Yeah. That's right. It runs. After a 15-year slumber, Succubus llives. I've still got some serious fine tuning to do, but it runs. Like a bat outta hell. With it's tail on fire. Running from the devil.

I'm quivering.

Right around 90-95 I get a kind of whine out of the front end. It might be the tire. I'm pretty sure I need new fork bearings. Could those whine?

It still doesn't want to idle, but it will if I insist. Still have some fine tuning to do. The tach doesn't seem to register anything over 6,000 rpm, but the engine keeps climbing. Probably need another tach.

God that was fun. And it runs. It really runs.

As my number of posts grows, I was getting concerned that the forum would have to invent a new category. Perhaps "idiot guru who can't make his bike run, but posts a lot" or something. I've got about 800 posts before then. I should have it purring by then.

Damn, it runs.

Patrick

[John]

Pat

I 've some tachs if you should need one.

[pggg]

Dodgy rev counter, check the rectifier connection is good where the wires bolt and earth to the airbox bracket under the seat, also the 6 wire plastic plug connection coming from the alternator, behind the right side panel, 3 white, 1 yellow, 1 brown, 1 green, could be grungy and corroded in there.

[eroellig]

Re: 3rd gear, 6,000 rpm = 90 mph?

Originally posted by Succubus
Or do I have an issue with my tach?

Yeah. That's right. It runs. After a 15-year slumber, Succubus llives. I've still got some serious fine tuning to do, but it runs. Like a bat outta hell. With it's tail on fire. Running from the devil.

I'm quivering.
[...]

Patrick, I'm so close to where you are now I can TASTE it!!!!

Congrats.

[JWSanders]

Re: 3rd gear, 6,000 rpm = 90 mph?

Originally posted by Succubus

[Damn, it runs.

Patrick

That's such a great feeling, ain't it? Congrats!!

[wingnut]

Succubus, Great news! Nothing feels better than that first ride after you bring one back from the dead! Now the fine tuneing. The little steps that make it perfect. Its an addiction I think we all share here.

[underdog57]

Yeah !!

Patrick ,
I'm in the same situation you are , or close to it !!

Mine idles too low to keep running by itself, if I adjust up it goes to 3k. No happy medium yet..

Running on the road it idles around 3k at stops. If you let it settle down it will idle low again .

It run great under power till you hit between 4 and 5k where it breaks up ...
Get past that and it roars .
Not trying to hijack your thread , but it would seem if either of us figure out what wrong . Two new/old bikes from the dead will be a force to reckon with !!!

I'm looking into ignition timing today .
And the way it runs I'd guess the main jet is ok . Might tweak the
emulsion jet height???
Any ideas??? So far have come a long way .
And It a blast to ride as is , just tweaking from here ...

Bob

[Incubus]

Hey, Underdog, it sounds like we're time sharing the same bike. One thing is certain, when I find the answer to the idle thing this bike is going to be exceptionally well tuned. I've been over and cleaned/adjusted everything at least six times. It runs very well and keeps getting better, but nothing so far has addressed the underlying issue of the high idle.

My answer? Don't stop. If I keep moving this bike's a she-demon riding the hot breath of hell and pissing off all other drivers. If I have to stop I have to engine brake just to drop the revs enough to get into first. The shudder at 5,000 rpm is just a quiver now and 5 grand and above is invigorating. Damn this bike is fast, and it gets you there exceptionally quickly.

In my younger years I would have accepted this state of running as adequate and I would be running it as is. Now, however, I want it perfect.

If I find out the answer to the revving thing, I'll let you know. I'll be spraying every vacuum connection today with some type of extremely volatile liquid looking for a leak. If I don't find anything I may just run it like this for a while and see if whatever the issue is heals of its own accord.

Patrick

[underdog57]

What helped the breaking down on mid-range??
Mine really flutters there . I put sea foam in the last gas tank.
And was hoping riding it might get some bugs out .

The carb should be really clean on mine also ...
Over 5k is amazing . Wakes up allright !!!!!!!!!!!

I dont want to ride too much if this might hurt it though .
I can put my hand on the motor quickly after I shut her down .
Dont think its running too hot . But this is VT too and was low 60's yesterday ....
I'm going to give the extremly volatile Ether trick a try also..!!

These bike are like sisters , or twins LOL .

I've never ridden on the road before , took a saftey class last year .
So have not tried to piss off other cars yet !! Getting used to the bike . It takes bumps and rides real good ...

Chat on
Bob

[mitch]

High idle

Sounds like you both need to clean those carbs one last time and make sure you pull the emulsion tubes out and clean them well! The idle problem should be cured with a easy bench sync. Check out the maintenance section for the steps in doing both of these . You fellas are close but it will take just one more clean.Good luck and enjoy them old hot rods.
Doug

[Incubus]

My primary 5 grand issue was a clutch problem. I rebuilt the clutch and scuffed up the metal plates with 150 grit sandpaper and now it just quivers a little at 5 grand as I'm passing through. The remaining quiver, I believe, is tied to whatever makes our bikes want to rev without cause.

I have eliminated almost everything that could cause a vacuum leak. I have new carb holders and I replaced the vacuum petcocks with aftermarket gravity feed petcocks from Mikes XS. I got new seals for the carb tubes. I put new vacuum line between the number 2 carb and the vacuum advance. The only things remaining to check, vacuum wise, are the integrity of my workmanship when I mounted the carbs and the vacuum pump on the pickup coil plate. I don't think this is a downstream issue with the air filter on on that side of the carbs. But who knows.

If it's not a vacuum leak I'm at a loss. Maybe you'll come up with something that can help us both.

Patrick

[underdog57]

Hi Patrick ,
I just bought the bike last year , so its from a one owner .
There is a Winner header on it .I thinks its stock other than the header .

I took compression , All great 155 160 150 150 .

Only checked the valve gaps , One exauhst is .006 or .002 tight.
Going to let that go ...

I cleaned and cleaned those friggen carbs ...Then cleaned more. set floats a bunch of times . I have the XJ carbs as the 79 xs carbs have broken idle mix screws . Carbs have all stock parts , no jetting done ..
On the floats it has the plastic ones , one was crumbling so replaced one float . I set them by measurement then checked the actual level ..with the plastic 1/4" tube .

At one point it raced when I hit the enrichener , think it bogs it now . I had to clean the enrichener jet in the bowls . All four plugged ...Think that fixed that ...

I took it out under power today , under the 4k to 5k throttle stutter , I tried the enrichener . It bogged , hmmmmm
My guess its running rich , So guess what ??

I ran it for hours and a lot of miles today , Been running reg gas , So put hi-test in to see if that might help . Guess were supposed to have hi-test??
Well it ran like crap after a few more miles . Stuttering around 3k even . I drove it in the garage , and shut it down . Gas is pouring out of the breather box ... Popped off the cover and turned the fuel on again , # four carb is dumping gas ....
Wonder if the float is gas logged ot hanging up ...
#one plug black , #2 and #3 plug not bad #4 black ...
I might change all the floats as it seems to be giving me a rich mixture ...I think those floats are killing it ...

Also did the sync with the tube and trans fluid . It work pretty good . But did hunt a bit .

How many cans of carb cleaner is this supposed to take ??LOL
I did remove the throttle plates and put in new rubber shaft seals .
They were in bad shape too. The 79 ones seemed good...
Oh , this morning I hosed the carb boots down with a big dose of wd-40 . nothing happened . I checked the vacuum hose to the @ two carb for timing advance ....Previously I did cut the end off as it was leaky ...
New plugs as of last year . I got rid of the octapuss and am running off one petcock , using prime all the time . Put in a inline shut off valve .

On yours racing with the enrichener , I bet your float bowl circuit might be plugged ...
I'd like to know the fuel leval while running , especially after the gas pouring incident after my ride ...
Looks like I gota pull those carbs again !!


Later
Bob
Hope we get em soon !!

[HobbyMan]

Like PRO told me, replace those float pins no matter what condition you think they are in. Some more good advice given to me is to chuck a Q-top in a drill and polish the float seats. Works well.

[underdog57]

I put new float needle valve and seats in , new pins also .
I think I pulled a bad move and left the little screens out . They were shot . Bet thats what happened today ...
Can those be bought ??

Bob

[HobbyMan]

yeah, you need those I don't know where to get them