Update on my bike

Ok, well now that I have time I got my bike into the garage, pulled the carbs off, attempted to bench synch them via the cut strips of pop bottle. I did 3 while wiggling it till i couldnt wiggle it any more, then i did 4, 2, and 1 the same.

then i turned in t he mixture screws all the way in then put them 3 turns out.

heres a video of it running:

http://s362.photobucket.com/albums/oo70 ... 0_0001.flv

It tends to pop after accelerating... and my camera could only hold 13 seconds of video... my memory card is missing, and yes my mufflers are off, I took em off to give them the diet coke treatment.

so, I think I'm going to try and build a 2 bottle synch tool, I dont know how to work it though, could you guys elaborate? THen I'm going to have someone color tune the bike and see how it runs.. if it aint perfect, I'll throw in the towel and take it somewhere, I pretty much need it going to the end of break, so yep. One other thing playing against me is that our internet is down, I'm using my cousin pre-historic pc right now.

please point me in the right direction what needs to be done, I polished the bores, polished the emulsion tubes, the carbs are clean, theres no doubt in my mind, also, before I pulled these carb off I did the propane torch test and the bike didnt accelerate at all.


one more thing.... bigfitz, I think I'm going to go to yale soon to get a tank, maybe a newer front end to put on there, depending how much money I get to keep out of my paycheck, want me to call you? maybe we can hang out or somethin

 

Dude, "poppidy-popping" (not backfiring!) on decel is normal, ESPECIALLY without exhaust (or almost anything non-factory, really). My Seca pops like a mother when I engine-brake..

Let it warm up and idle for a few minutes, do not rev it. pull the plugs, adjust mixture until you get a light tan color across all four... as for syncing, you'll know it's way off if it starts racing at zero throttle when it warms up.

One of the home-made manometer threads

Synch 3&4, then 1&2, then 2&3. Repeat... Check plug color again.

It seems to me you're pretty darn close for a bench-sync..

 

ya i had the bike warmed up before that vid, just wanted to show how it started... but I'm not sure if its really all that normal of a popping.

only thing I really need to do is get the idle adjusted right.. I was letting the bike pudder at around 600 ish turning the knob, and it got to 900 rpm, well then when i hit the throttle it reved to 4K and stayed there.

but fitz said popping was a lean condition

and I copy pasta'd the how-to on making a 2 bottl synch tool, ill browse that thread to see if it says how to use it

 

Today's hot tip Schooter, when adjusting the idle screw, just move it a fraction & blip the throttle, let the revs settle before adjusting further.
Happy twiddling. Wiz.

 

Popping is a lean condition, but.... You don't have any exhaust on it, so for now, don't rely on popping to tell you what the mixture is like. Read the plugs. Also, our carbs don't have "coasting enrichment" which exists on certain carbs to cure the decel popping.

Check the throttle cable, make sure it's not too tight. You should have a little bit of wiggle on the cable when throttle is closed (check at the carbs)
You already checked for vacuum leaks...
Bike still races to 4K after a throttle blip? SYNC.

Ooooog! Schooter make bottle thingy, sync bike! :mrgreen:

Or.... pay shipping, I'll send you two dial-style vacuum gauges for free.

 

Rip the mans arm off, Schoot'.

 

I built one of the 2 bottle manometers. I used automatic trans fluid for the liquid. When you bench sync the carbs they should be pretty darned close, at least mine were. No expert here, have only done it the one time . When you hook up the 2 hoses, say between #1 and #2, the liquid will hold steady in the 2 bottles or start rising in one of them (through the hose that connects the 2 bottles). Turn the sync screw between #1 and #2 in or out and you can watch the liquid move. Whichever way the liquid is moving (or not) turn the screw till the liquid moves toward level in both bottles. When you bench sync them they should be close enough where the liquid doesn't just jump all over the place. Like I said, only done it the one time. If this doesn't sound right, someone JUMP IN! Hope this HELPS :wink: ...

skillet

 

ya i kinda figured it out..


I jsut made a run to walmart, I felt weird buying 2 baby bottles at midnight, but i hope the hose I bought works, its from an ice maker package, if not ill returnt it...

but if i cant get my snych tool right, i mite have to take you up on that free synch tool stereo.

 

TWO bottle synch tool? Deposit on the bottles? Due to the economy,I just don't have that much coin to toss around! Just bustin'on ya schooter...

 

haha, this synch tools getin expensive, 4 dollars a pop for baby bottles, already broke one. I hope my hose will work, and theres no air leaks.... gonna do it this afternoon

and tomorrow im goin to the salvage yard to get a tank and maybe a front end

 

I put silicon around the hoses where they come out of the stoppers. No leaks :wink: ...

skillet

 

Holy crap - that's the first time I've seem the bottle manometer. Talk about K.I.S.S..........not!

Why not just use the yardstick one with 1 tube? If you have the carbs bench synched they will not suck up the oil before you can adjust them.

No need to make it more complicated than it needs to be....