Hi guys, im a noob here, but a pretty experienced d.i.y mechanic.
First things first, the bike has new rings, size 40 instead of 38 pilot jets and 3 turns, Fuel float height was set to 16.75mm instead of 17mm (slightly richer) , the float valve needle-tips are squished at the rubber tip not a perfect pyramid , And it did sit for months after the rebuild with the petrol cock left to prime and flooded the engine oil with petrol, but i caught onto that and drained the sump and reinstalled fresh oil, and installed an inline tap to the petrol cock to shut off when its not in use.
Valve adjustments were done when cold, not sure if need be done when hot, but they were not jammed open, i had clearances on all 16valves
The Bike runs pretty good, except for its erratic idle bouncing up 250rpm and down., so i assume now it must be the carb sync, they were synched by eye by me before i re-installed the carbies after i did the rings and valve adjustments..
Heres the kicker, I cant just plug off cylinders 3 and 4 and sync one and two together with a t-piece to a vac gauge. the bike wont start / or idle, it kicks over but wont start,
(all ports are blocked off at this stage) 1 and 2 with a T-piece to a gauge and 3 and 4 seperate lines that are blocked with a thick-screw.....And it wont start,
Then i switch it around and try and just see what vacuum #1 cylinder is pullin by itself, the other 3 vac-ports blocked individually,.. no go-er again,
Then i switch it around again back to stock with 1 and 4 synched up with its original hose and 2 and 3 to a T-piece as it is stock but the 3rd line that operates the petrol-cock diaphragm disconnected and plugged into the gauge, and it gives me a reading of about 15 cfpm and it starts/idles fine...
And when i connect 2 and 3 up like it is stock and then block the fuel vacuum line up with a screw and I then T-piece #1 and 4cylinders to the gauge it reads about 20cfpm vacuum,
Why cant I do each LEFT and RIGHT bank individually does anyone know?,
From what Ive been told by a mechanic you synch in #1 and 2 with its screw inbetween,
Tthen synch in #3 and 4 with its screw, then synch in the middle screw (between 2 and 3) obviously with a 4 vac-gauge setup,
But i cant even run the engine with its vacuum lines blocked , i have to run stock hose-routing, somethings up here, Ive sprayed starting fluid around the intake boots 'carb to head side' and nothing fluctuates so no leaks i assume, and i did spray a liberal amount....
Anyone with some helpful advice would be appreciated,
Am i running too rich with the richer+ leaking fuel bowls that it causes some issue or is the not being able to block off the vac ports separately other than stock factory setup something entirely different?