Carbs again

My 750 is running ok but at some stage I want to or will need to clean the carbs. I am just wonder how many guys do it and when they put them back on the bike it goes better. from reading the posts on the site you only here about the poor outcomes anybody got a good story !

 

You only hear about bad stories because by-and-large those are the folks who don't do the carbs right the first time and have to do them again and again, trying to troubleshoot a myriad of symptoms instead of just rebuilding them right the first time. The folks who do it right won't post thread after thread, but they do respond to them, and some even write How-To's for the rest of us to learn from.

I've been successful at rebuilding my 750 carbs on non-runner that I bought. After some jetting work, it ran like a top. I crashed it, and it sat for 5 months or so without me draining the gas, so I cleaned them out again, and it was old hat. Bike's been running great since.

Since it's your first time rebuilding the carbs, give yourself plenty of time, and expect to pay $100-$200 for parts (plus shipping). RickCoMatic has an excellent How-To (I think he links it in his signature). There is also threads on breaking the rack.

If you hit any stumbling blocks, don't be afraid to ask questions. Just about everyone on this site has been through their carbs, it's almost required given that it takes so much time and that these bikes aren't worth paying a shop to do it for you. Proper tuning can only be accomplished with a clean set of carbs, so it will make a difference.

 

Most carb rebuild failures you read about are due to taking shortcuts. A carb is a percise fuel metering device and quick fixes do not work. If you go through ALL the carb rebuild steps you will succeed the first time , providing you are not changing exhaust or intake setup.

 

I did mine 2 years ago and was thorough, 2 years and 12,000 klms later they still run fine.

 

Yes it's worth it.. take your time do it right, you will be pleased with the difference and you wont need to fiddle with them over and again ... valve shims too. As you've noticed.. th carbs th carbs th carbs etc ... they didn't do it right th first time !

 

From experience--don't assume anything, clean it all, and then re-clean it with particular attention to the pilot circuit (at least in my case). Follow Ric's instructions to the letter. Wet set the floats. Get valves in spec. Bench sync, running sync, use colortune plug. Should be fine. Or, you can do as I did the first time and assume the top portion was ok, and get to do it all over again. At least the second time getting the carbs on and off again will be easier.

 

Valve clearances need to be CHECKED (not necessarily "fiddled with" but checked) every 5000 miles.

Carbs should at the very least be re-sync'ed every time you change out a shim.

 

I agree with fitz. Dont do your carbs if your ignoring valves.

Order isnt as important as doing both. I have my carbs off now then off to the valves for me. If I have to shim then back to the carbs to sync.

If you havent checked the valves in 5k then do it. You'll hear it mentioned here before me that the bike will return the favor by giving you a cheesy grin again the next time you ride.... as long as carbs are sync'd after any valve adjusts that is.

I've never had any problems with doing carbs. That doesnt mean that I havent had to replace a rack. It means that I was ready for whatever was around the bend. If your even at the point of considering doing this yourself, then do it. Read, read, then read some more. This is the place for questions along the way. Putting them back in being the hardest part.

Atleast then you'll have the satisfaction of doing it yourself, the experience, more experience if you find you missed something, then the huge reward that comes with self accomplishment and knowing they have been done, done right, and done by you.

Let us know how it goes.

 

I did my carbs in sequence with the valves. They were all gummed up/plugged up. Installed them, sync'ed them, and color tuned. (I could probably tweak them a smidge more) The bike runs great with no starting issues. This board is great for carb information.