| Author | Message | ||
     Tyler7686 |
Has anyone done these mods to their carbs? Thoughts? https://www.youtube.com/watch?v=iTPPP8jkje4 | ||
| Bluzm2 |
Tyler, yes many of us have done mods like this. The most common mods are main jet 190 or 195. Pilot jet is a 45. Remove low speed mixture plug and set screw to 2 1/2 turns out. The slide modifications don't do much. I've done it and also left it alone. The one thing that does help though is the shim under the needle. Most use a .050" shim. You can find them at a hobby store that has RC car parts. They are a common shim used in some of the motors and such. I've never filed the slide or clipped the springs. These simple mods totally change the way your Cyclone runs. No more Keihn cough and low speed "farts". Your bike is old enough now that you want to really check the slide diaphragm. They do get old and start breaking down. Check the rubber carefully. Same goes for the accelerator pump diaphragm. | ||
| Fxdrydr |
I just changed out to 45 and 195 jets, a lower pedestal, an external air bleed screw and a new accelerator pump diaphram. Didn't drill out the hole. Easy-peasy. Got parts here - cv performance They have great instructional vids too. | ||
| Xldevil |
I've drilled a small hole in the lower half of throttle plate, 2mm,on my Thunderstorm upgraded Sportster. The same does Mr.Wood to his CVs. It smoothed out the idle and gave better response right from idle. Can really recommend that mod,besides all the others mentioned. | ||
| Buellistic |
CV CARB. Class 101, just PM me for a copy ... | ||
| Dave_02_1200 |
I reworked my CV-40 carb per Buellistic's instructions. It is amazing just how good a CV-40 can be when it is set up right. | ||
| Imadog |
I am interested in more information on drilling out the throttle plate. My carb mods are: #45 Pilot (from #42), Stock #200 main jet, Shimming needle 0.050", new intake gaskets, new carb gaskets and accelerator pump. I had to replace my vacuum slide because I oversized the hole to 9/64" (oops!) and have left it alone this time. I believe my idle mixture is 2-3/4 turns out. My bike is still cold natured for the first 15 minutes, after that it runs really well. What are the pros and cons of drilling the throttle plate? Thanks in advance. Other mods are Force winder intake and V & H slip-on. (Message edited by imadog on March 15, 2015) | ||
| Ks2cohawk |
Does anyone have any advice for jetting a 2002 Buell M2 for a mile high? 5280 feet above sea level. I live in Denver and regularly ride higher elevations. My bike has a Forcewinder intake and a D&D muffler. It seems to run just fine right now and I've never taken it apart to see what has been done to it thus far. Any suggested starting points? | ||
| Imadog |
The higher the elevation, the less fuel is used because there is less oxygen, if the bike pulls strong through all gears and the throttle response is smooth, with no hiccups, you have got the jetting right. If there are issues at different throttle position, this can be corrected through proper jetting and needle position. | ||
| Imadog |
Just checked this link http://xlforum.net/vbportal/forums/archive/index.p hp/t-1132332.html I remember riding my 1981 KZ750 from Denver to Vail and I had carb issues over 6500 ft. It has a CV four carb set up (Keihin). | ||
| Dvc357 |
Thanks to Buellistic for his thorough step by step insight! +++++ |
