DIY - Drilling your carburetor slides - Page 3

choneofakind · March 3rd, 2018, 07:29 AM

^^ Yepp. It's worth the science, but I found response was better (smoother and less agressive, therefore a little easier to work with) in the mid range with the factory slides than with drilled holes. I plugged mine and had zero issues for many miles. It's worth the science though!

They have a habit of snapping up and down. Good for going wide open, not so great for street mid throttle, which was more my use. NBD.

Remember that those slides move up and down in response to vacuum as a method of controlling the airspeed through the throat. This is why they're called Constant Velocity carbs. There's definitely some tuning to be done with when and how fast those slides move for optimal constantness, but that takes some serious time

Triple Jim · March 3rd, 2018, 07:37 AM

Quote:

Originally Posted by maverick9611

#70 drill bits really need to be used in a pin vise. i used a standard chuck and had to wrap duct tape around the the end for a shim. i have extra bits if any one needs one.

An old trick is to wrap solder around the shank of the bit in a neat layer.

maverick9611 · March 3rd, 2018, 08:50 AM

good info the duct tape worked but barely

March 3rd, 2018, 08:50 AM	#83
maverick9611 "a legend in my own mind" Name: maverick9611 Location: Augusta,Georgia Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge(brownie),2020 aprilia dorsoduro, Posts: A lot. MOTM - Feb '18	good info the duct tape worked but barely __________________________________________________ "trying not to get old"

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March 3rd, 2018, 07:29 AM	#81
choneofakind ninjette.org certified postwhore Name: . Location: . Join Date: Feb 2011 Motorcycle(s): . Posts: Too much. MOTM - Feb '13, Feb '14	^^ Yepp. It's worth the science, but I found response was better (smoother and less agressive, therefore a little easier to work with) in the mid range with the factory slides than with drilled holes. I plugged mine and had zero issues for many miles. It's worth the science though! They have a habit of snapping up and down. Good for going wide open, not so great for street mid throttle, which was more my use. NBD. Remember that those slides move up and down in response to vacuum as a method of controlling the airspeed through the throat. This is why they're called Constant Velocity carbs. There's definitely some tuning to be done with when and how fast those slides move for optimal constantness, but that takes some serious time