1300 Coolant to carb and intake bypass question. - VTXOA
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post #1 of 31 (permalink) Old 03-05-2019, 09:15 PM Thread Starter
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1300 Coolant to carb and intake bypass question.

Need a diagram, I have searched, the pics from old threads are gone Restoring one with all rotted hoses and wanting to just bypass (I live in a warm area.)

"It's better to step over things that aren't there than it is to trip over things that are." Anthony Wayne Martin.
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post #2 of 31 (permalink) Old 03-06-2019, 06:20 AM
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Welcome Phil from Daytona Beach, enjoy and ride safely.
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post #3 of 31 (permalink) Old 03-06-2019, 06:41 AM
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Phil,
I don't know if this helps, but check it out, it is from Honda Direct Line where I buy most of my parts & pieces from.

https://shop.hondadirectline.com/OEM...E1AMEA4E1900DB

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post #4 of 31 (permalink) Old 03-06-2019, 08:17 AM
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the coolant lines are not there for cold weather....


unless you live where 150 degrees are common..


but go ahead.. your bike.



2005 VTX1800 F, type II, Silver Tribal, 88,000 Miles, Purchased Feb, 2005.
MTC clutch & springs.. K&N Air Filter. Garmin 2597 GPS.
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post #5 of 31 (permalink) Old 03-06-2019, 11:55 AM
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I removed coolant hoses from my carb when changing out the slide valve diaphragm.
One hose has different ID on the ends so that was re-used to do the bypass.
Link below has the hose routing diagram. Coolant heats up manifold also.
A pic of a hose that was cut off and the piece not used. Cooling system diagram found.
Coolant cross-over pipe hose stayed, manifold to carb was old route, now manifold to TEE on return line to coolant pump.

https://www.vtxoa.com/forums/7-vtx-1...ml#post4565022
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File Type: png 1300 coolant hose cut off.png (310.0 KB, 8 views)
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Last edited by Hans&Feet; 03-06-2019 at 12:19 PM.
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post #6 of 31 (permalink) Old 03-06-2019, 01:21 PM
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I don't want to cause an arguement here. I just want to understand what the porpous is for doing this?

8,000K HID Head Light Conversion, ISO FlameGrips, Kury Turn Signal Mirrors, Mustang seat W/ Driver Backrest, Paladin Backrest/luggage Rack/Saddlebags.
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post #7 of 31 (permalink) Old 03-06-2019, 02:02 PM
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Quote:
Originally Posted by A_Ninja_Racer View Post
I don't want to cause an arguement here. I just want to understand what the porpous is for doing this?
There isn't one aside from not wanting to get the correct hoses.
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post #8 of 31 (permalink) Old 03-06-2019, 02:55 PM Thread Starter
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Quote:
Originally Posted by A_Ninja_Racer View Post
I don't want to cause an arguement here. I just want to understand what the porpous is for doing this?
No need for a circuit to keep my carb from icing where I live.

Quote:
Originally Posted by chuck_VTX F View Post
the coolant lines are not there for cold weather....


unless you live where 150 degrees are common..


but go ahead.. your bike.
Yes, they are a carb/intake heater for cold climate. Fuel/air has strong chilling properties and carbs will ice up in cold climates.

Quote:
Originally Posted by Hans&Feet View Post
I removed coolant hoses from my carb when changing out the slide valve diaphragm.
One hose has different ID on the ends so that was re-used to do the bypass.
Link below has the hose routing diagram. Coolant heats up manifold also.
A pic of a hose that was cut off and the piece not used. Cooling system diagram found.
Coolant cross-over pipe hose stayed, manifold to carb was old route, now manifold to TEE on return line to coolant pump.

https://www.vtxoa.com/forums/7-vtx-1...ml#post4565022
That's exactly what I was hoping to do route wise except skip manifold, but wanted to see a flow pattern to be certain it was something that could be done with an expectation of reliability. Thank You!

"It's better to step over things that aren't there than it is to trip over things that are." Anthony Wayne Martin.
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post #9 of 31 (permalink) Old 03-06-2019, 03:05 PM
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<< Deleted >>



2005 VTX1800 F, type II, Silver Tribal, 88,000 Miles, Purchased Feb, 2005.
MTC clutch & springs.. K&N Air Filter. Garmin 2597 GPS.

Last edited by chuck_VTX F; 03-06-2019 at 05:23 PM. Reason: no
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post #10 of 31 (permalink) Old 03-06-2019, 05:08 PM
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It is for emissions, fuel vapor condensing on cold surfaces becomes liquid. So you need a richer mixture for cold engine to run properly.

Many drag racers have a cool can to reduce fuel temp.

I have not investigated fuel/air density to see what the benefit is.

I had a Nissan truck that I disabled the vacuum valve to reduce air temp(block warm air from exhaust manifold). The carb did begin to ice up, vehicle slowed down.
I restored the vac hose and back to highway speed.. Snowing in South Carolina 1991-92

If I had a free breathing intake with exposed filter I probably would not have done this. I have the stock air box so I do not expect any icing conditions. Warm air from engine side intake holes.

2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 193,834 VTX miles

Last edited by Hans&Feet; 03-06-2019 at 10:33 PM.
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