Shade Tree Solution part deux (Dual carb)
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- HOTT
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Shade Tree Solution part deux (Dual carb)
A while back a member here asked if I could help him with a carb set-up.
His bike is an awesome sport mod that just didn't allow for a central carb.
This set-up will use 2 Weber 34 ICT 1bbl carburetors.
Note;to me this is the fun part of these bikes, (that is, looking at the possibilities)
I make no claims of better or worse. Just what can be. Why?... Because we can. Start with 1.63" water jet exhaust flanges. "but the holes won't line up..'' yes you are
correct. I chose to weld up the holes and redrill. How much? Dunno. I used the originals
as a guide. Easier than measuring (for me). note; flanges are cut +.030" to allow tubing to slip thru With the flanges ready we can start piecing the tubing. We won't be using old exhaust pipe
today. Fresh 16ga. mild steel. Cut at 45's. A band saw makes for good cuts. Did I mention an old bent valve head makes for a great jig?) Make several good tacks around the joints. The trick will be to weld it up and still have it slip in and out of the mounting flanges. Why? Keep reading.. I clamped some tube and made a pass with the hole saw. This will be the riser for the carb mount. tip; weld this riser to the carb mounting flange before fitting to the connecting tubing.
As neat as it was with square corners, we can improve things greatly by just knocking off the corners. Cutting corners? There is a joke in there someplace...
You can see why it's best to have the flanges separate for a few more steps. Easier to get into
corners and less chance of the mounting flanges coming up uneven. Intermission
Coming up; Gaskets and the amazing world of linkages
His bike is an awesome sport mod that just didn't allow for a central carb.
This set-up will use 2 Weber 34 ICT 1bbl carburetors.
Note;to me this is the fun part of these bikes, (that is, looking at the possibilities)
I make no claims of better or worse. Just what can be. Why?... Because we can. Start with 1.63" water jet exhaust flanges. "but the holes won't line up..'' yes you are
correct. I chose to weld up the holes and redrill. How much? Dunno. I used the originals
as a guide. Easier than measuring (for me). note; flanges are cut +.030" to allow tubing to slip thru With the flanges ready we can start piecing the tubing. We won't be using old exhaust pipe
today. Fresh 16ga. mild steel. Cut at 45's. A band saw makes for good cuts. Did I mention an old bent valve head makes for a great jig?) Make several good tacks around the joints. The trick will be to weld it up and still have it slip in and out of the mounting flanges. Why? Keep reading.. I clamped some tube and made a pass with the hole saw. This will be the riser for the carb mount. tip; weld this riser to the carb mounting flange before fitting to the connecting tubing.
As neat as it was with square corners, we can improve things greatly by just knocking off the corners. Cutting corners? There is a joke in there someplace...
You can see why it's best to have the flanges separate for a few more steps. Easier to get into
corners and less chance of the mounting flanges coming up uneven. Intermission
Coming up; Gaskets and the amazing world of linkages
If we can't fix it, we can fix it so no one else can.
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
Lucky #13 BOTY 2018
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
Lucky #13 BOTY 2018
- Rat
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Re: Shade Tree Solution part deux (Dual carb)
LOOKS easy .......
Gord
Gord
"I'd rather Ride than Shine"
‘14 KLR650 ... not a rat ... yet
‘84 GL1200i ‘R2B6' (Rat to Be 6, the last, adopted by twowings)
My Original 'RAT' was a hybrid '82 CB900/1100F
‘14 KLR650 ... not a rat ... yet
‘84 GL1200i ‘R2B6' (Rat to Be 6, the last, adopted by twowings)
My Original 'RAT' was a hybrid '82 CB900/1100F
- HOTT
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Re: Shade Tree Solution part deux (Dual carb)
well a break did me good...So were was I..
From here you can see the underside of the carb mounting flange. As covered in the original
thriller, Shade Tree Single Solution, weld flange first then weld inside the riser followed by a pass with the hole saw to open the throat of the intake. As for the head mounts, I welded the seal from the bottom and leveled with a belt sander.
(Why not weld around the top?) 'cause it looks good.
(Would you do it again?) [shrugs shoulders] probably not. I cut the gaskets from some of Auto Zone's best. The linkage starts with the cable stop.
This is a pull only set-up repeat these steps
to the left side carb if a push/pull throttle is desired
Using 1" flat stock, drill a 3/8'' hole with a cut slot. A slight bend that will give the most
direct cable movement. It looks like this.... The pull throttle arm looks like this, again using the hole with a cut slot to retain the cable. Note the cable pulls straight with no rubbing on adjuster tube. Mandatory 5 photo break
From here you can see the underside of the carb mounting flange. As covered in the original
thriller, Shade Tree Single Solution, weld flange first then weld inside the riser followed by a pass with the hole saw to open the throat of the intake. As for the head mounts, I welded the seal from the bottom and leveled with a belt sander.
(Why not weld around the top?) 'cause it looks good.
(Would you do it again?) [shrugs shoulders] probably not. I cut the gaskets from some of Auto Zone's best. The linkage starts with the cable stop.
This is a pull only set-up repeat these steps
to the left side carb if a push/pull throttle is desired
Using 1" flat stock, drill a 3/8'' hole with a cut slot. A slight bend that will give the most
direct cable movement. It looks like this.... The pull throttle arm looks like this, again using the hole with a cut slot to retain the cable. Note the cable pulls straight with no rubbing on adjuster tube. Mandatory 5 photo break
Last edited by HOTT on Sun May 26, 2013 5:27 pm, edited 1 time in total.
If we can't fix it, we can fix it so no one else can.
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
Lucky #13 BOTY 2018
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
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- robin1731
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Re: Shade Tree Solution part deux (Dual carb)
In the last pic, I see the cable is mounted fairly close to the pivot point. How is the pull on the throttle? Light, heavy, good? Also, if you've had the bike running and ridden it, how is throttle response? Is it abrupt or is it nice and linear?
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
- JBz
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Re: Shade Tree Solution part deux (Dual carb)
Cool Mon. Looks like dual accelrator pumps one on each . It will probably fly................... jb
jbz........... Thinkin about sh-t too hard and You wont get anything done
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Re: Shade Tree Solution part deux (Dual carb)
Keen eye Robin. Yes it looks very close to compared to a 1000 or 1100 pulley. It's just a touch closer than a 1200 pulley.robin1731 wrote:In the last pic, I see the cable is mounted fairly close to the pivot point. How is the pull on the throttle? Light, heavy, good? Also, if you've had the bike running and ridden it, how is throttle response? Is it abrupt or is it nice and linear?
Easy component to change if necessary.
The feel is like that of a new medium displacement bike. I'd say good.
I even tried it with just one carb spring. That felt like a dirt bike throttle.
The twist rotation is (counter clockwise) 12 to 8.
I don't have any performance figures that is up to the end user,
but I suspect with the right jets & pipes...Abrupt
AbruptLooks like dual accelrator pumps one on each
Just a quick look at the downstream hook up.
I cut this arm on a curve to prevent the chance of a WFO bind up.
Same center to center of course.
If we can't fix it, we can fix it so no one else can.
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
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Re: Shade Tree Solution part deux (Dual carb)
Anxiously awaiting test results.
Claude
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Now the world is Weird and people take Prozac to make it normal.
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84 GL1200 dressed naked with everything to return to naked.(gone to Gson in Oregon) action1
Now the world is Weird and people take Prozac to make it normal.
RETIRED and LOVING It!!! anim-cheers1
82 GL1100 Standard (gone to Gson in Oregon) action1
84 GL1200 standard with Hondaline bags.
84 GL1200 dressed naked with everything to return to naked.(gone to Gson in Oregon) action1
- sunnbobb
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Re: Shade Tree Solution part deux (Dual carb)
My, nice work old man. I thought the same as Robin, but also realize having the pivot point lower should give you awesome throttle on. More, please.
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1978 Learning Experience
1980 County Road Hauler "Brain Damage"
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1977 Bulldog Inspired "Vaincre"
1981 Street Fighter GL1100 "No Quarter"
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---- Bradshaw Bikes custom polishing for your wing. Visit us on facebook!
1978 Learning Experience
1980 County Road Hauler "Brain Damage"
1978 Cafe Custom Gl1000 "Vyper"
1977 Bulldog Inspired "Vaincre"
1981 Street Fighter GL1100 "No Quarter"
1983 Supercharged Street Drag "Anubis" (in worx)
1983 gl1100 mint restoration "Kristen"
1985 Aspencade..pondering.
- robin1731
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Re: Shade Tree Solution part deux (Dual carb)
It will but it may be too responsive on the street. Much like the 1/4 turn throttles I use on race bikes. On the street they can be a bit of a pain. Hit a bump and your hand moves just a little but the throttle moves enough to change speed. Up or down. Same bump on a stock throttle and you never know it.sunnbobb wrote:My, nice work old man. I thought the same as Robin, but also realize having the pivot point lower should give you awesome throttle on. More, please.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
- joedrum
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Re: Shade Tree Solution part deux (Dual carb)
looking good hott ,,,fab work is top level .....
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Re: Shade Tree Solution part deux (Dual carb)
Any feedback on this carb setup? How is it working for this guy? I am unable to run a central carb on mine due to other things wanting that space. This is a carb set-up I have been thinking about but seems to be little info out there... everyone is all worked up about the IDFs.
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Re: Shade Tree Solution part deux (Dual carb)
I will have to check in.TDIJ wrote:Any feedback on this carb setup? How is it working for this guy? I am unable to run a central carb on mine due to other things wanting that space. This is a carb set-up I have been thinking about but seems to be little info out there... everyone is all worked up about the IDFs.
When last we spoke, he was coming down on the jetting and looking into
eliminating the points (weak spark) for ECI.
If we can't fix it, we can fix it so no one else can.
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
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the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
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- ericheath
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Re: Shade Tree Solution part deux (Dual carb)
Ahhhem, clearing throat.
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
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Re: Shade Tree Solution part deux (Dual carb)
ericheath wrote:Ahhhem, clearing throat.
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and a whole garage full of possibilities!!
Psst. oh and by the way CHANGE YOUR BELTS!!!!
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!
Psst. oh and by the way CHANGE YOUR BELTS!!!!
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Re: Shade Tree Solution part deux (Dual carb)
..you swallow a bug ?ericheath wrote:Ahhhem, clearing throat.
He sez "they are amazing". Quick starts. Solid idle.
He's only made one jet change. Thinks maybe one more (jet)
change for redline, but not before ignition change.
The bike has been in service for some time.
He is currently replacing driveshaft...Oops.
Sorry for the delay.
HOTT
If we can't fix it, we can fix it so no one else can.
the Condor BOTY 2011
Ol' Sparky BOTM Dec. 2011
Lucky #13 BOTY 2018
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