my dealer told me the XX-carbs can´t be adjusted, just changed when worn out. right now i´ve 56.000 miles (90.500km) on the bike.
is that right? :crap:
If the main throttle shaft is worn like an egg and you have air/vacuum leaks new carbs are in order if not get a second set rebuild/re-jet those and install/sink. Throttle shaft runs the length of both banks of carbs. Crap gas with neglect can also kill carbs. Keep us up on you progress. I would do a lot on my old carbs before getting new ones. How much are they $1000.00 or so ?
I always like to have a back-up around just in case something goes wrong. Once you rebuild a set of carbs correctly. All your friends will be coming to you for your service. Make them do the hard part, pulling them off the bike. I've done lots of sets but the only thing you can't fix on carb's is a worn out main/throttle shaft. I have had success with drilling them out and re-sealing them but they seem to only last half as long as new ones. I hope I've been of some help. atriot: :thumb:
about €300,- without work. but i don´t know if the dealer was talking about the whole system or only needles and jets. but i bet i´s not the whole carb for 300,-
If the carbs haven't been run over by a car or dropped from a great height they should be re-buildable. Take your time doing the first carb slow and exact, then do the same three more times. You'll have a lot of fun. I do feel a little guilty but I'll get over it. Good Luck :thumb: I think I'll buy a set and re-build them. I want to see if the if I can reseal worn out throttle shafts like I use to do with import carborator cars. Sound like I too have a project on my hands. Besides I know they will work better than flat slide carbs, I can't believe how they rattle and shutter at low speed. I guess for racing they work but not ever day in stop and go traffic. Keep us posted
I never needed mine rebuilt in over 184,000km. Resynched when serviced, yes, but never rebuilt. Have you had a dyno run to get an exhaust analysis to see if it is just lean or rich somewhere? Could just be worn needles which should be replaceable with OEM or at worst with a jet kit.
no dyno run. what is the best way to find out what´s wrong? putting new needles as a try-out?
imho it´s way to fat/rich running as it is starting to puke out of the exhausts when it´s warm. as long as the engine is cold everything´s fine.
Sounds like a jetting/mixture issue, have you got a K&N filter on? .. try a standard filter, but if you have a stage one jet kit fitted you might have problems ... take it to a good dyno shop and let them fiddle with it
Heisti, if you strip the carbs enough to get the needles out, they should be smooth with no notches or shiney(er) signs of wear. The jets should be perfectly round & not oval at all. I'm not a carb expert, but I have stripped & rebuilt a couple of banks, so any experts feel free to add info or corrections here!
Might also just be dirt clogging something up. I've had a bit of success with a couple that couldn't be balanced by giving them 1/2 hour in an ultrasonic cleaner.
what if we swap filters, needles and jets? ;-)
how many litres do you waste for 100km?
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Honda CBR XX Forum
439.1K posts
29.3K members
Since 2006
A forum community dedicated to Honda CBR1100XX Super Blackbird Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, modifications, troubleshooting, maintenance, classifieds, and more!