Hi all you air sucker modders, let me help out a bit.
first off in that carb pic with the yellow circle's, the fuel bowl has a vent and this winter down in FL mine just after i parked it leaving the key on the thing puked a little squirt of fuel, so it's there just as stated a bowl overpressure release and in cali it has to go to a fuel recovery box so the vapors can get sucked into the engine BECAUSE raw fuel is actually less environmentally friendly than exhaust. well i spill more gas on the ground than the bike purges so eliminate it if you like but you can run a hose off it to dump down instead of splashing off the lifter tube.
the fat hosed piece (other yellow circled part) at the top of the carb is a vent aswell, sinse the main jet s vaccume controlled, the other side of the diaphram has to be vented and the part is like a pcv valve just to keep dirt out of that section AND to slow the jet from returning closed too quickly (reduces potential backfiring due to an overly lean situation.

that hose off the rear head (2 of them), the fat one is the crankcase vent, in a car it goes to the pcv (positive crankcase vent) valve and for emissions purposes can go to the intake or just use that auto parts breather filter like the little red one in the earlier pics, on a harlie it's called a puke can. during piston travel the crankcase is under pressure or vaccume and thus needs to be vented to atmosphere and 'filtered' to prevent it sucking in dust. yama seemed to prefer doing it atop a cylinder instead of lower at the 'block'.

next time i take off the tank i'll remember where that other hose from the rear head goes!

oh and BTW, adjusting the main needle jet is pretty easy, but you gotta take the tank off....

oh yah my R* keeps right up with any Victory!

yep an 03 R*, 04 cromed wheels, bunch of stuff, inverted beach bars, wimmer super sucker intake (plated 24K)!

The other hose is the oil tank breather hose. As far as I know the float bowl vent is to keep the bowl at atmospheric pressure so when a low pressure situation is created in the carb by twisting the grip the gas will be sucked out of the bowl through the main jet and into the carb.

greyphart wrote:
Gonna see about this setup and get a Baron's kit for the fall project. Got a local shop that does dyno work so I won't have to try for any land speed records dialing it in. Thanks for the info. And thanks to Musky for being a very reliable source of tech info too.

Greyphart

You're welcome. You don't have to do the WOT in 4th gear so you don't need to go that fast. It's just more fun You can do it in third gear. So save your money from Dyno runs for more goodies.

Did mine yesterday...opted for the stainless "track only" filter Looks great... had a K&N big box previously. got lots of spit on the rear header was apain in the a$$ to clean. Hooked up the new air box and rode it in 50* weather. ran like crap off idle. Got the idle set a lil better rode it today in 70* was better but still have issues in the first third of my throttle. Any ideas let me know!!

heres the pic at night. Have pics of the bracket i made to if anyone needs an idea.... well i have a dumb computer...or maybe the operator any way i have pics and i ll try to get them posted... Thanks again for the awesome idea I spent 70 and this thing looks great.


BTW i used a bezel from an old passing lamp to cover the black rubber at the rear of the filter fit perfect just notched it to fit around the screw on the clamp.

Budgetbiker wrote:
heres the pic at night. Have pics of the bracket i made to if anyone needs an idea.... well i have a dumb computer...or maybe the operator any way i have pics and i ll try to get them posted... Thanks again for the awesome idea I spent 70 and this thing looks great.


BTW i used a bezel from an old passing lamp to cover the black rubber at the rear of the filter fit perfect just notched it to fit around the screw on the clamp.
$70 dlls ?? I spent bit less than 40 including a bracket I had custom made to keep the filter in it's place

Yeah i saw the filter you have but didn't like the way the filter looked on my bike seemed kinda squatty on the elbow... though when its flush mounted looks great. I went with a 9 " spectre that has a stainless filter mesh. Turned out looking great. the stainless is where the extra money came in though it was 50 for the filter.... still a big savings over the 400 for a kit!!!

what kind of color you have on your gas tank ?

what king of color you have on your bike?