Jets
- Thread starter Gretsch
- Start date
sweatmachine
moped
the main only affects full throttle, as in wide fucking open. The needles work from just opening the throttle to all but full throttle. If it's weak at full throttle, your main is wrong. If it's weak at mid throttle, your needles are wrong. My guess is you need either no shims, or one shim on each needle.
Gretsch
Rocker
I'm running no shims right now. What about turns out?
sweatmachine
moped
does it idle ok? The idle mix doesn't effect much besides idle and 1/8 throttle or so.
Gretsch
Rocker
When I start her up sometimes she tries to stall unless I blip the throttle a bit. Once the engine has warmed up the idle seems fine.
sweatmachine
moped
what if you use the choke, does it still stall when cold?
Gretsch
Rocker
Yep. Even with the choke all the way open.
sweatmachine
moped
What pilot jets? 40s?
Richen up the mixture screws then, or go to 42 pilots.
Richen up the mixture screws then, or go to 42 pilots.
Gretsch
Rocker
42 pilots right now. To enrich the mixture screws do I go in or out. Sorry, I'm still a FNG when it comes to all this stuff.
sweatmachine
moped
to richen the idle mix unscrew the mixture screws, lefty loosey. Try going about a 1/4 turn at a time with the bike FULLY warmed up. Ride for 30 mins minimum before you start playing with them because a cold bike will fool you.
sweatmachine
moped
no prob man, hopefully we'll get ya runnin' great!
Gretsch
Rocker
Changed up the jets to 130's and I can feel the low end power better than with the 127.5s. The middle and Top end still seem a bit lacking but I'm going to put a shim or two in to see what that does. I replaced the shit screws with the SS ones from New Bonneville when I was in there. These things are a must if you keep taking the carbs apart.
mikenva
Rocker
I wish they would pull that calculator off the net that and jenks are both bull shit.Its funny how if something gets put on the net people go by it .The guys that put those things might not know more then you do about what jet it takes.One of them guys even told a few of us as much lol.
mikenva
Rocker
Use the main to get the top end right ,after you do that then use the niddle to get the 1/4 to 3/4 throttle right.Alot of people go to big on the main it makes the bike feel better on take off but kills the top end.At wot top rpms you are running 100% on the main.at part throttle you are running a % of the main.What % of the main you get is by the niddle.Hope that makes since.Its very easy with the butt dyno to be to rich on the main when maybe you needed to be richer on the niddle or open the slide quicker.