Post subject: choke problem on a cv carb + Adding a primer
Posted: Fri Jul 28, 2006 8:11 pm
Buggy Enthusiast
Joined: Thu Jun 22, 2006 5:19 pm Posts: 337
people have been talking about the choke on the cv carbs so i went and studied mine i figured out that when you pull the throttle it slowly goes up you would from the looks of it get get better acceleration if it was stuck up has anybody taken some jb weld or something and gluded it up? if so did it work? did you have starting problems?
_________________ hammerhead 150 SS edition,10in. aluminium wheels,speakers,blinkers high low beam head lights,uni filter with custom air box with dual snorkels,all new vw buggy suspension,127.5 jet,10gram sliders, 39t final sprocket
_________________ hammerhead 150 SS edition,10in. aluminium wheels,speakers,blinkers high low beam head lights,uni filter with custom air box with dual snorkels,all new vw buggy suspension,127.5 jet,10gram sliders, 39t final sprocket
I assume the choke is acting up..correct? I simply removed the choke...cut a piece of thinnest gasket material I could get that roughly fits the shape of the surface contact area...put the two bolt holes thru the material..bolted the choke back on the carb OVER the gasket material....unplugged the wires to the choke. Now it starts right up...idles better....isn't influenced by ground/resistor problems etc....better performance all around, because the choke isnt doing whatever it feels like doing BW
_________________ Dazon single seat frame..13 hp Honda clone
_________________ on my talon 125 i have hp pipe, uni filter, 120 jet, 3 wheelr mud fenders, 39t final sprocket, car alarm for a horn, a set of tires for every terrain, custom reverse mirror, 2 land rover head lights on the front, dark blue green paint 4sale
i just found a website that tells you how to make it manual if it does work ill do that
_________________ hammerhead 150 SS edition,10in. aluminium wheels,speakers,blinkers high low beam head lights,uni filter with custom air box with dual snorkels,all new vw buggy suspension,127.5 jet,10gram sliders, 39t final sprocket
Joined: Sun Feb 27, 2005 1:36 am Posts: 4227 Location: In the thumb, MI
hh150guy you're looking at the slide, not the choke. The choke isn't visible on a CV carb because it's an additional fuel circuit that's open only when first started. Once running, current thru the resistor heats up the "bystarter valve" which pushes a needle into a seat and closes this extra circuit. On a CV the slide isn't connected to the throttle and instead responds to vacuum created by the throttle valve opening. THat big round can on top of the carb hides the vacuum diaphragm that moves the slide.
There are 3 mods to the choke: Block it as Byron suggests. Remove the heater assembly and replace with a screw to make it a manual choke. Remove the entire choke assembly and convert it to a primer system.
_________________ .
2 Polaris RZRs & a Dune 150. Ridge Runner--Gone. Yerfdog 3206--Gone (but you never forget your 1st!). Buggy pictures, mods, ideas, how-to's: http://tinyurl.com/8ltm8
Last edited by guy48065 on Mon Sep 17, 2007 9:36 am, edited 1 time in total.
_________________ hammerhead 150 SS edition,10in. aluminium wheels,speakers,blinkers high low beam head lights,uni filter with custom air box with dual snorkels,all new vw buggy suspension,127.5 jet,10gram sliders, 39t final sprocket
After removing the bystarter assembly and gasket you will see the 2 screw holes + 3 fuel holes. You need to plug the hole closest to the intake end and exhaust ends, leaving the one in the middle between the screw holes. I was concerned the epoxy might leak down into the holes so first I plugged them with a small ball of solder hammered into the hole. A dot of adhesive paper like a mailing label would probably do just as well--it'll be covered with epoxy anyway.
Attachments:
File comment: Tap the ball into the hole to seal. CVprimer02.jpg [ 107.39 KiB | Viewed 15326 times ]
File comment: Melt solder into a ball a bit larger than the hole. CVprimer01.jpg [ 62.69 KiB | Viewed 15308 times ]
_________________ .
2 Polaris RZRs & a Dune 150. Ridge Runner--Gone. Yerfdog 3206--Gone (but you never forget your 1st!). Buggy pictures, mods, ideas, how-to's: http://tinyurl.com/8ltm8
Joined: Sun Feb 27, 2005 1:36 am Posts: 4227 Location: In the thumb, MI
Next get a 1/8" brass (preferred) fitting and cut it to about 1/2" in length. Mount it into a drill chuck and thin down the bottom end by lightly squeezing with a pliers as it spins. Stop when it just fits into the hole.
Attachments:
CVprimer3x.jpg [ 60.35 KiB | Viewed 14597 times ]
_________________ .
2 Polaris RZRs & a Dune 150. Ridge Runner--Gone. Yerfdog 3206--Gone (but you never forget your 1st!). Buggy pictures, mods, ideas, how-to's: http://tinyurl.com/8ltm8
Last edited by guy48065 on Mon Jul 31, 2006 9:42 pm, edited 1 time in total.
Joined: Sun Feb 27, 2005 1:36 am Posts: 4227 Location: In the thumb, MI
The CV carb has a drain fitting at the bottom of the fuel bowl that can be opened and used as the fuel source for the primer rather than adding a tee in the fuel line. Just to make sure fuel always flows thru this drain I ground a flat in the needle and lightly screwed it all the way in.
Attachments:
CVprimer2x.jpg [ 69.01 KiB | Viewed 14571 times ]
_________________ .
2 Polaris RZRs & a Dune 150. Ridge Runner--Gone. Yerfdog 3206--Gone (but you never forget your 1st!). Buggy pictures, mods, ideas, how-to's: http://tinyurl.com/8ltm8
Users browsing this forum: No registered users and 0 guests
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
Your Privacy Choices