installed aftermarket 30mm carb & intake manifold. - Honda Rebel Forum
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post #1 of 24 Old 06-20-2018, 10:12 PM Thread Starter
 
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installed aftermarket 30mm carb & intake manifold.

In case anyone is interested, you can see it in an album in my profile for Wyl Ike,
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post #2 of 24 Old 06-21-2018, 06:26 AM
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Nice job - were you aware that the first generation rebel intake has a rubber boot like the one you used instead of bolt on ?

I'm interested to see what your mileage looks like with that carb. Thanks

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post #3 of 24 Old 06-21-2018, 07:05 AM Thread Starter
 
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Thanks, yes I was aware of the rubber boot style on the early Rebels, but got interested in this one, because of the larger boot opening offered from the supplier by special request, and also the low cost of $26.
This one is 36mm, has anyone measured the original factory intake manifold boot?

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post #4 of 24 Old 06-21-2018, 07:21 AM
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Well done pictorial.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
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post #5 of 24 Old 06-21-2018, 07:46 AM
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Quote:
Originally Posted by Wyl Ike View Post
Thanks, yes I was aware of the rubber boot style on the early Rebels, but got interested in this one, because of the larger boot opening offered from the supplier by special request, and also the low cost of $26.
This one is 36mm, has anyone measured the original factory intake manifold boot?
I can measure it later today. It seems odd that the default position for the electric choke on that carb is open. Have you removed the choke to look at it?

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post #6 of 24 Old 06-21-2018, 02:19 PM
 
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Electric/automatic enricher, I have that on my GY6 buggy, 150cc with that company's 24mm (manifold side ID) carb. I 'm impressed that you got a manifold to mate it to the Rebel 250...these buggy/atv carbs are so much easier to find and cheaper to replace. I can't wait to hear how the performance compares to 'stock'.
That looks like an AWESOME answer to folks with Gen1 rebels that can't find carb parts or replacement intake boots....



Inside the 'automatic enricher' is a wax plug (like a car thermostat) and an electric heater coil. At key-on 12v heats the wax and as it eventually melts it expands and pushes close the enricher piston.
On the buggies they require a 5ohm or 10ohm 5amp resister in series to temper the heater coil so it doesn't burn out after only a few uses or heat up too soon and kill the engine before its properly warm. (in the wiring diagram, buggy harness has the connector for this enricher and a pair for the resister)

2009 Honda Rebel 250; 2009 Honda Shadow 750 Spirit
"The bravest thing for me to do is admit when I am wrong" - unknown
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post #7 of 24 Old 06-21-2018, 02:37 PM
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Thanks for the explanation @kryton - a wax motor - makes sense now.

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post #8 of 24 Old 06-21-2018, 11:22 PM Thread Starter
 
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Quote:
Originally Posted by kryton View Post
Electric/automatic enricher, I have that on my GY6 buggy, 150cc with that company's 24mm (manifold side ID) carb. I 'm impressed that you got a manifold to mate it to the Rebel 250...these buggy/atv carbs are so much easier to find and cheaper to replace. I can't wait to hear how the performance compares to 'stock'.
That looks like an AWESOME answer to folks with Gen1 rebels that can't find carb parts or replacement intake boots....



Inside the 'automatic enricher' is a wax plug (like a car thermostat) and an electric heater coil. At key-on 12v heats the wax and as it eventually melts it expands and pushes close the enricher piston.
On the buggies they require a 5ohm or 10ohm 5amp resister in series to temper the heater coil so it doesn't burn out after only a few uses or heat up too soon and kill the engine before its properly warm. (in the wiring diagram, buggy harness has the connector for this enricher and a pair for the resister)

Great thanks for the note about the inline resistor. After I read your post, I did an ohmmeter check of the choke coil, and it's 28 ohms, so it's still fine, but I have an 8 ohm power resistor and plan to install it. There was no documentation with the carburetor. I did the math, and it looks like the coil would be dissipating about 5 watts without the resistor, and about 3 watts with.

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post #9 of 24 Old 06-22-2018, 08:48 AM
 
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This is the one I used on my buggy Auto-Choke Control Resistor
the info about using the resister is in the electrical/harness bits of the buggy manuals & forums (see your carb's fitment)
and in the for what it's worth category, here is the spare/replacement auto-enricher Auto-Choke Control Resistor
it will 'probably' be ok running without the resister, the design was to ensure on cold days it stays open long enough, and 'probably' won't burn out without one but hard to say how well a heater element lasts with 20% more power than 'designed' ...


I peeked at the seller's ebay page for the intake, seems the standard 33mm they sell is intended for the Gen1 rebel with the oem carb, neato!
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"The bravest thing for me to do is admit when I am wrong" - unknown
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post #10 of 24 Old 06-22-2018, 10:40 AM
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Quote:
Originally Posted by Wyl Ike View Post
Thanks, yes I was aware of the rubber boot style on the early Rebels, but got interested in this one, because of the larger boot opening offered from the supplier by special request, and also the low cost of $26.
This one is 36mm, has anyone measured the original factory intake manifold boot?
The engine side of the carb is 33.5 mm OD
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