The AKvision RPM stumble, pt 2

[Night Vision]

hmmm... jets swapped and hoses swapped too  :-\ those are some crazycake carbs  ::)

are you by chance dislexic dyslexic  ???

dyslexic people of the world.. UNTIE!

[Kid Jedi]

High speed sounds like electrical. Try replacing the wires and caps. its a cheap & easy thing to fix and you arn't out more than a few bucks if I am wrong.

[Rick G]

Just don't use carbon core car wires . Get wire core from your local lawnmower shop.

[rhpaw]

are you by chance dislexic dyslexic  ???

I multitask by drinking heavily and fixing at the same time.

[inanecathode]

High speed sounds like electrical. Try replacing the wires and caps. its a cheap & easy thing to fix and you arn't out more than a few bucks if I am wrong.

It's not, it's all over stumble with a surge on throttle roll off.

Rhpaw: Remember when i was like "You sure you have the vacuum flapper hooked up to the right port?" then you were like "oh yeah, totally". Good times :P

[akvision]

well maybe.... one at a time guys..we will get this unit fixed.. i need it in
September.  one way or the other it will be sorted out.  Rhpaw has yet to tackle the starter seal and he has new high tension solid plug wires too.  I know, if it isn't broke we are not fixing it.
just waiting for hte next report.

[rhpaw]

Sorry guys, I was too tired last night. wound up watching TV. Tonight I have the season finale of LOST to watch-- but I'll probably put the bike together after that, but no starting and driving.
I always have to sit and ponder a LOST episode for a few hours after I watch it.. I find that working on the bike goes welll with that.

I'm sure the misrouted hose will fix it.

[Night Vision]

I multitask by drinking heavily and fixing at the same time.

I like your style! I resurrected my brother's powered by beer

I'm sure the misrouted hose will fix it.

sounds like that'll do it! Yay! 

[inanecathode]

If i recall correctly (which is seldom, given my brain storage record so far) the two ports in question are different in that one is ported, and one is not. I'm trying to think which is which, but either way if you hook them up wrong you'll end up with a flapper that's working backwards. Open when it should be closed, and closed when it should be open.

EDIT: I'm pretty sure the flapper uses manifold vacuum, as ported vacuum would be momentary and more of an emissions (GASP) or ignition control (old school) type of signal. Manifold vacuum is for acting on things.

[Kid Jedi]

Maby your mixture screw o-rings are going out....

[inanecathode]

Maby your mixture screw o-rings are going out....

Why would that cause a lean condition so bad it wont run right under wot? Mixture screws are for idle performance only.

[rhpaw]

idle to about 4k, yea... The idle screws are fine.
Last night I finished LOST for the season and put the bike back together. I started it this morning but didn't get a ride to test.
So far so good.
With the YICs disconnected, I was getting an stable idle of 1000 while it sat there cold.... Quite surprising, actually as my idle seemed much smoother with YICs installed last week. I'll have to wring her out today i nthe afternoon and see where my idle is now, and if I resolved the highRPM crap. Then adjust idle/sync/mix again, then re-install YICs.

hmm.. maybe it works now.

[inanecathode]

... But i did ask if the lines were connected to the right fittings :P

[rhpaw]

nah.. I'm thinking out of the box  :D

[akvision]

Ok, I guess I have to wait for an answer on Monday... going out boat camping on the backside of the island.

[Kid Jedi]

well i had a rich stumble caused by my mixture screws leaking, so just an idea :)

[Kid Jedi]

Did you put the spring on the acc. pump on the wrong side of the diaphragm?

[inanecathode]

Did you put the spring on the acc. pump on the wrong side of the diaphragm?

Why would this cause an overly lean repeatable off throttle surge?

[Kid Jedi]

because the carbs are tuned for the addition of the acc. pump.

[inanecathode]

How does the accelerator pump have to do with an off-wot surge though, is what i'm asking :P
Accelerator pump(s) are for off idle enrichment because theres not enough vacuum in that sudden moment to pull enough fuel, then the pump runs out of fuel to squirt right as the vacuum is coming on for the main jets. The accelerator pump is a single, momentary, additional enrichment of fuel not a continual source as are the idle and main jets (and mid range jets if'n you're fancy)
Now if your check balls are missing from the accelerator passages, then you're in for a world of bizzaro problems...