R
redruM69
Guest
Ahh OK, I thought by factory you meant factory stock. 
Yea, I figured the needles are something like these guys.
Yea, I figured the needles are something like these guys.
-
Required reading for all forum users!!!
Welcome!
Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.A note to new registrants...
All new forum registrations must be activated via email before you have full access to the forum.A Special Note about Email accounts!
DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.A note to old forum members...
I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.
Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...
-
Returning Visitors
If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.
If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.
how is the tune on those carbs? I noticed a PM for some advice.
I see some bad information here turning you in the wrong direction.
I also see some beliefs that are hindering you from a true scientific approach to get the proper stoichiometric ratio on your fuel system.
summer I am very busy in my motorcycle shop and drag racing my gs1000 2V
trippivot@hotmail
I see some bad information here turning you in the wrong direction.
I also see some beliefs that are hindering you from a true scientific approach to get the proper stoichiometric ratio on your fuel system.
summer I am very busy in my motorcycle shop and drag racing my gs1000 2V
trippivot@hotmail
R
redruM69
Guest
You know, I spoke too soon earlier, it still isnt quite right...
Once fully warmed up, it seems lean on high RPM 6k+rpm cruise (slight choke helps), and rich on rolling on the throttle a little from low RPM (runs OK when cold). Idle is smooth, WOT is strong.
I now have a suspicion I may need to get the correct longer/softer aftermarket springs. I think cutting the stock springs makes them too soft when the slide is closed, and too stiff when open. Thus making it rich when cracking the throttle, and lean on higher RPM's
Please correct my beliefs if you feel Im heading in the wrong direction!
G
Guest
Guest
Factory Pro sells them
First of all.. cutting ANY spring shorter makes it STIFFER!!
next I want to know#1 pilot jets size
#2 main jets
#3 needle setting clip groove
#4 air box or not?
#5 what exhaust ?
what spark plug do you run?
I want to know where (approx) you live altitude is a big factor
trippivot@hotmail.com
next I want to know#1 pilot jets size
#2 main jets
#3 needle setting clip groove
#4 air box or not?
#5 what exhaust ?
what spark plug do you run?
I want to know where (approx) you live altitude is a big factor
trippivot@hotmail.com
R
redruM69
Guest
I do have a set of stock springs to put back in if thats what you recommend.
Pilots are stock, 42.5.
Mains are 117.5 right now, I have a set of 112.5, 115, and 120's also to play with.
Needle is in the middle, or one richer from the middle, cant remember.
No air box, running mid quality XS oval pods.
Exhaust, unknown brand 4-1. Probably MAC or V&H. Loud "Gemini" can on the back.
Plugs are NGK D8EA.
Altitude is a bit higher here in Utah, approx 3500ft
Pilots are stock, 42.5.
Mains are 117.5 right now, I have a set of 112.5, 115, and 120's also to play with.
Needle is in the middle, or one richer from the middle, cant remember.
No air box, running mid quality XS oval pods.
Exhaust, unknown brand 4-1. Probably MAC or V&H. Loud "Gemini" can on the back.
Plugs are NGK D8EA.
Altitude is a bit higher here in Utah, approx 3500ft
3500 feet is a challenge, I used to live in SLC. and raced at bonneville flats and the drag strip out west of town.
start at the pilot and get it lean enough it needs to respond to each idle screw. perform a lean idle adjustment test. to achieve the highest idle.
the bike will need choke to start when cold. always! if it doesn't lean it out more with a pilot jet change. 1 size at a time. 40 maybe 38.5 ?? plug chop will tell
you say the mains feel good with a 117? ok for now (I think smaller but?)
and the idle is good? ok great 2 out of 3 you are nearly there
the needle is a tough one to adjust but I'd start at 1 clip above middle on all 4 carbs. keep them all the same. ride it normally and feel the 1/8 throttle to about 1/2throttle while gently rolling into the grip. no quick or abrupt throttle twisting. change clip position til you find the best one to live with. it is a true compromise and don't chase expectations, even new flatslides hesitate at massive throttle imput. so I hope you/we are not chasing improper throttle technique.
what color are the plugs? there are 3 chop areas to test pilot- needle- main. keep leaning out until all the black is gone and replaced with chocolate brown. new plugs or sand blast the old ones to get a good color reading. this is tedious but worth it. you 'll be on the better side of 40 mpg if you do.
in reality the spring is not a big deal but you can swap them around if you like.
I want to make it clear- you cannot just stab a set of CV carbs and expect your engine to jump. you need to gently(semi quickly) roll into the throttle and allow the vacuum to build for smooth acceleration. no closed - WOT stab all at once.
no matter what if you just mash the throttle all at once most all bikes fall on their face for a millisecond until the intake velocity catches up with the butterfly input.
start at the pilot and get it lean enough it needs to respond to each idle screw. perform a lean idle adjustment test. to achieve the highest idle.
the bike will need choke to start when cold. always! if it doesn't lean it out more with a pilot jet change. 1 size at a time. 40 maybe 38.5 ?? plug chop will tell
you say the mains feel good with a 117? ok for now (I think smaller but?)
and the idle is good? ok great 2 out of 3 you are nearly there
the needle is a tough one to adjust but I'd start at 1 clip above middle on all 4 carbs. keep them all the same. ride it normally and feel the 1/8 throttle to about 1/2throttle while gently rolling into the grip. no quick or abrupt throttle twisting. change clip position til you find the best one to live with. it is a true compromise and don't chase expectations, even new flatslides hesitate at massive throttle imput. so I hope you/we are not chasing improper throttle technique.
what color are the plugs? there are 3 chop areas to test pilot- needle- main. keep leaning out until all the black is gone and replaced with chocolate brown. new plugs or sand blast the old ones to get a good color reading. this is tedious but worth it. you 'll be on the better side of 40 mpg if you do.
in reality the spring is not a big deal but you can swap them around if you like.
I want to make it clear- you cannot just stab a set of CV carbs and expect your engine to jump. you need to gently(semi quickly) roll into the throttle and allow the vacuum to build for smooth acceleration. no closed - WOT stab all at once.
no matter what if you just mash the throttle all at once most all bikes fall on their face for a millisecond until the intake velocity catches up with the butterfly input.
Last edited:
R
redruM69
Guest
Excellent info so far. Im not stabbing the throttle btw, but that does make sense.
I do have another question though. What differences do the idle mixture screw vs. the pilot jet have on low end/slight throttle? Does one affect mixture more in a different range than the other? Or are they the exact same circuit, and one just compensates for the other?
WOT chop test may be difficult where I live. However, just looking at the plugs after a ride show some black soot on the outer ring, and tan on the electrode/tip.
Also, a little more info that may help determine something. If I ride WOT for more than a moment, and then roll the throttle back down a bit to cruise (not closing the throttle), the carbs seem to lean out really bad, popping and hesitating, then clears up after about 2-3 seconds. Its almost like the slides close too far, then come back up..
Im going to play with clip positions more this eve if I get a chance.
I do have another question though. What differences do the idle mixture screw vs. the pilot jet have on low end/slight throttle? Does one affect mixture more in a different range than the other? Or are they the exact same circuit, and one just compensates for the other?
WOT chop test may be difficult where I live. However, just looking at the plugs after a ride show some black soot on the outer ring, and tan on the electrode/tip.
Also, a little more info that may help determine something. If I ride WOT for more than a moment, and then roll the throttle back down a bit to cruise (not closing the throttle), the carbs seem to lean out really bad, popping and hesitating, then clears up after about 2-3 seconds. Its almost like the slides close too far, then come back up..
Im going to play with clip positions more this eve if I get a chance.