| Author | Message | ||
     Maxbuell |
Have carb torn down will be rebuilding soon Any suggestions? 2002 M2 w/ DD pipe. Had a 185 main- 42 slow going 190 45 | ||
| Phelan |
pull carb. install mikuni. done.  | ||
| Jayvee |
Replacing the intake seals at the same time? And get couple carb gaskets, they are expensive at the dealer. And some earplugs... | ||
| Jefc73 |
Iam with Phelan.  | ||
| Screamer |
Check the inside of the slide where the needle rests. On bikes with over 20K miles, I've discovered some that had a wear mark up to .030-.040" deep, which drops the needle and could make it run slightly lean (the opposite of shimming the needle). Adding an appropriate shim resolves the problem. | ||
| Iamspartacus |
+3 to getting a Mikuni HSR 42. I tinkered with the CV for MONTHS and it was till giving me reliability issues. Took it to two different shops and they couldn't do any better. Finally said to heck with it and bought a used Mikuni. Best $200 I've ever spent on the bike. Dead nuts reliable, better throttle response and easier to work on. Something to think about... | ||
| Jefc73 |
I have a Mikuni on my S1W and it is awesome. My CV on the S2 is coming off and a Mikuni is going on shortly. Makes a huge difference in performance. Best money you will spend. | ||
| Stev0 |
Nothing wrong with the CV if it's tuned correctly.... but therein lies the problem... | ||
| Buellistic |
CV CARB. Class 101, just PM me for a copy ... | ||
| Dammitquikgentry |
Off topic but I pm'd you buellistic! Need some 101's! | ||
| Iamspartacus |
Buellistic's how to's are good- I tried going that route first. Did everything recommended from drilling and "radius-ing" the slide to the correct jets and needle shimming. The CV still was a pain in the @$$. To be fair, I know that the CV can be a reliable and good performing carb- mine obviously had issues which affected its performance. However between myself and two Harley mechanics, we couldn't figure out what that issue was, so rather than continuing to push my bike home every other day, I decided to give up on the CV and get an HSR 42. The Mikuni is better in EVERY aspect. Some have said the CV adjusts better for elevation change, but I've read from reliable Buell experts (such as NRHS) that the CV is no better (and no worse) in this regard. So while my CV was not a typical example and from all accounts they can deliver solid performance for minimal expense (an M2 stock needle, some washers, proper jet sizes and some elbow grease), even the most finely tuned CV-40 will not outperform an HSR 42 If your CV is running fine right now and you just need to rebuild it, there's not much to it. If you're having reliability issues with your CV or are wanting better performance, spend a couple Benjamins and go with a Mikuni- you won't regret it. | ||
| Buellistic |
Iamspartacus: The problem with your CV Carb. was/is the two HARLEY-DAVIDSON technicians ... Have 111,819.6 miles as of the last ride on my OEM CV Carb. !!! (Message edited by buellistic on September 13, 2014) | ||
| Maxbuell |
Well my rebuild went great. Was easy and cheap. The bike has not ran this good in years. New seals, gaskets, needle, main and slow jet around $30 | ||
| Iamspartacus |
Buellistic- That may be, but it was cheaper to buy a Mikuni than to take to five more Harley shops trying to find someone who could figure it out- parts are cheaper than labor. As I said, the CV's are known to be pretty reliable in general. They are not known however to outperform the HSR. So for me, it made much more sense to switch to a Mikuni as it was going to cost me money either way. | ||
| Buellistic |
Iamspartacus: If it works better for you, go for it ... My intent is to tune OEM parts and see how much more "i" can get out of them with out spending any more money that "i" have to ... | ||
| Woodnbow |
Haven't seen Buellistic's 101's but the CV's are easy to rebuild. Dead simple to work on. And I replace them with Mikuni's whenever I have the money to do so. The performance bump is definitely worth it. | ||
| Dave_02_1200 |
I set up my CV40 on the M2 per Buellistic's recommendations. That worked very well and the price was right. It has been stone reliable too. The Mikuni HSR 42 Easy Kit is also a good set up. I had a Mikuni on the M2 for two years before trying the modified CV 40 set up so I can say from experience that both work great but very differently; The CV 40 gives smoother power delivery but the Mikuni gives more immediate response and hits harder when you crank it open. For riding on wet roads or in traffic the CV40 is king but, on a hot rod with hotter cams, I would go with the Mikuni. If/when the DDFI stops working on my S3T the Mikuni will go right on and it will work well with the hotter cams in the S3 | ||
| Huck_farley |
Just some trivia here: all the Kawasaki KLR650's for the past 30 years have CV40 carbs.Smaller jets and no accelerator pump. We buy the rubber diaphragm from Harley when we need one it's much cheaper than Kawi. |
