stock carb vs speed carb question

Chaz

Well-Known Member

Jun 3, 2012

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Vancouver, British Columbia

Jul 11, 2015

• #1

Does anyone know if the jets of the stock nt and speed carb are the same size? Or is one bigger than the other. Sorry I don't have the little drill bits or wire guages to check this out myself, just hoping somebody knows.

thanks for any help with this

 

MotorBicycleRacing

Well-Known Member

Jul 28, 2010

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SoCal Baby!!!

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Jul 11, 2015

• #2

Chaz said:

Does anyone know if the jets of the stock nt and speed carb are the same size? Or is one bigger than the other. Sorry I don't have the little drill bits or wire guages to check this out myself, just hoping somebody knows.

thanks for any help with this

Click to expand...

They are the same size in my experience.
70 jet

 

Chaz

Well-Known Member

Jun 3, 2012

1,004

72

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Vancouver, British Columbia

Jul 11, 2015

• #2

Ok, thanks very much for the info.

So then if the jets are the same size but the speed carb has a larger throat, does that mean that, if the needle clips are in the same position, the speed carb would be running a bit leaner than the stock carb?

 

Davezilla

New Member

Mar 15, 2014

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San Antonio Texas

Jul 12, 2015

• #3

Just a little bit, the speed carb is only 1/2mm larger than the standard NT, but that's worth an extra mph or 2 on top..

 

Chaz

Well-Known Member

Jun 3, 2012

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Vancouver, British Columbia

Jul 13, 2015

• #4

Thanks for the info, Dave