Author Topic: Velocity stacks tuning  (Read 12164 times)

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Offline flybox1

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Re: Velocity stacks tuning
« Reply #25 on: June 20, 2011, 02:33:36 PM »
oooh guys....come on.  ;D
we're acting like parents, wanting to keep our kids protected from 'CB tuning'  harsh reality and in the fold because we know better  ::) (and, of course we do )
let him go learn
hopefully, someday, he will understand, and then he will be back.
the 'ishouldalistendtoyouguys' threads are priceless... ;)
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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Offline shizzomynizzo

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Re: Velocity stacks tuning
« Reply #26 on: June 20, 2011, 03:01:36 PM »
Well on the bright side the carbs are much easier to remove with stacks, I won't mind trying to tune them.

I am going more for looks on this bike. If it runs like crap and I can't fix it, I'll put it up on CL like everyone else  :P

yea those stacks + "cafe racer" in the title and you can sell it for $2000 more than you paid. EASY

Exactly what I was thinking...I recently saw a kz550 "cafe" listed for 3000, others in better condition are going for 900-1300 in my area
1974 CB550
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Offline Dirk D

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Re: Velocity stacks tuning
« Reply #27 on: June 21, 2011, 04:11:30 PM »
Well I'll take everyones advice and let it stock. So does anyone want to buy some velocity stacks for $50?

Offline Coyote13

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Re: Velocity stacks tuning
« Reply #28 on: June 22, 2011, 02:07:42 PM »
Oh don't get down about it and just fold your cards!  Take a leap of faith and get it done.  It'll take time and it'll be frustrating, but once you get that thing dialed in right it'll be the most gratifying thing in the world.  There are plenty of people who have done it.  Granted most of thsoe people have been working on race applications, but hey, it's your bike, you do with it whatever you want.
'78 CB750K.  Throttle ripper.
'71 CB100.  Grocery getter.
'01 XL883.  Panty dropper. Gone but not forgotten.

Offline Dirk D

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Re: Velocity stacks tuning
« Reply #29 on: June 22, 2011, 04:54:21 PM »
Oh don't get down about it and just fold your cards!  Take a leap of faith and get it done.  It'll take time and it'll be frustrating, but once you get that thing dialed in right it'll be the most gratifying thing in the world.  There are plenty of people who have done it.  Granted most of thsoe people have been working on race applications, but hey, it's your bike, you do with it whatever you want.
Well like I said I got them for cheap so I figured I put them on. Plus I like the look. I really don't want to mess with the carbs much because it is running so well right now. Plus I live in the desert and as I thought it sounds like it will ruin a motor more quickly
« Last Edit: June 23, 2011, 06:01:46 PM by Dirk D »

Offline Coyote13

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Re: Velocity stacks tuning
« Reply #30 on: June 23, 2011, 07:31:53 AM »
Well in that case you're probably right.  All that sand and dust floating around is no bueno for stacks.  Plus, who wants to go dickin' around making a solid motor run like poo?
'78 CB750K.  Throttle ripper.
'71 CB100.  Grocery getter.
'01 XL883.  Panty dropper. Gone but not forgotten.

Offline Tintop

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Re: Velocity stacks tuning
« Reply #31 on: June 23, 2011, 03:16:04 PM »
There is an alternative that gives you stacks & performance filtering, my filter kit.

http://forums.sohc4.net/index.php?topic=79491.0
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline lucky

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Re: Velocity stacks tuning
« Reply #32 on: January 21, 2012, 09:16:05 PM »
Wow, people are fed up with pod/velocity stack talk.
I'd just like to point out that, like you, everyone here has probably owned a bike that came with them, or attempted to use them because they look cool (thet do) , or someone handed down a set for free.
"It's not you, it's us".. I'd wager that 90% of the members here have chased erratic running conditions with pods/stacks only to eventually re-install a stock airbox with a better filter.
It's your turn to chase the dragon my friend, but you may only find snark and derision in the forum. There are some good older threads about some good starting points for jetting, but without a dyno and an exhaust gas analyzer, it's all trial and error.

Trial and error worked wonders for many years before dynos and gas anylizers.
Some mechanics are very good at tuning engines with their ears and eyes.
Listen,look at your spark plugs ,feel the pull.

Offline cb550choppa

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Re: Velocity stacks tuning
« Reply #33 on: January 22, 2012, 06:38:03 AM »
it took me 1 summer to figure my bike out now it runs prett dam good open carb straight pipes been running it like that for 22k miles and my motor is stock i run drill main jets too 1/16 and a stock low speed jet i tryed 10 different combos that one works best not great low end but runs awesome mid to high rpms my plugs are always a chocolety brown i check them every season if you learn how to read plugs you can tune anything i tuned my buddies 750 hondamatic with pods and he never thought once of changing it back he just had to give me time
chop what ya got

Offline phil71

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Re: Velocity stacks tuning
« Reply #34 on: January 22, 2012, 02:55:37 PM »
does that say "dream as youll live forever live as youll day today"?

Offline cb550choppa

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Re: Velocity stacks tuning
« Reply #35 on: January 22, 2012, 05:03:25 PM »
james dean
chop what ya got

Offline lucky

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Re: Velocity stacks tuning
« Reply #36 on: January 24, 2012, 01:12:30 AM »
oooh guys....come on.  ;D
we're acting like parents, wanting to keep our kids protected from 'CB tuning'  harsh reality and in the fold because we know better  ::) (and, of course we do )
let him go learn
hopefully, someday, he will understand, and then he will be back.
the 'ishouldalistendtoyouguys' threads are priceless... ;)

Once there was a young man and he thought he knew everything. When his dad tried to help him he said no I know all about it I will do it myself. BTW his dad was a master mechanic.
One day the young guy left home and was not seen for quite a few years. He went through lots of trials and tribulations out in the world.
One day he showed up back at his parents house and was there to visit.
While he was there he told his dad this..... "I cannot believe how much you have learned since I was gone."  LOL...lol

Offline lucky

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Re: Velocity stacks tuning
« Reply #37 on: January 24, 2012, 01:21:46 AM »
Wow, people are fed up with pod/velocity stack talk.
I'd just like to point out that, like you, everyone here has probably owned a bike that came with them, or attempted to use them because they look cool (thet do) , or someone handed down a set for free.
"It's not you, it's us".. I'd wager that 90% of the members here have chased erratic running conditions with pods/stacks only to eventually re-install a stock airbox with a better filter.
It's your turn to chase the dragon my friend, but you may only find snark and derision in the forum. There are some good older threads about some good starting points for jetting, but without a dyno and an exhaust gas analyzer, it's all trial and error.

you can probably get a lambda sensor for about $80. but honestly you'll still be fine just doing a plug chop on a good hill.

To be perfectly honest though... without engine mods or exhaust changes, those stacks really aren't worth running.
you won't see much if any power difference, and you'll lose some low end torque.

I actually did that. I bought an exhaust gas anyalizer  with oxygen sensor.
You know what i found out?
They are not very accurate, and the sensor really blocks the exhaust flow.
They only give crude measurements.
Do not waste your money Just read the plugs.
It had 3 colored lights, LEAN,RICH and OK.
Not much help. You need to know HOW lean,HOW rich.

Offline Retro Rocket

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Re: Velocity stacks tuning
« Reply #38 on: January 24, 2012, 02:29:01 AM »
Quote
You need to know HOW lean,HOW rich.

And "how ok" apparently..... :o
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