Question-------------------------
Followup To
Question -
Hey Chris - My girlfriends 82 Honda Magna V45 750 had a fuel leak from one of the carbs so I pulled them off (what a job THAT was) and opened a couple of the float bowls and found lots of crap so I re-built all four. I got them back in the bike and it runs better than it ever has, but it will intermittently stay revved way up when you let off the throttle. I thought maybe the cables were hanging up, but it's quite smoothe and the linkage is working smoothely as well. The throttle snaps right back as well and I'm at a complete loss as to what to do next. Can you help? Thanks! George
Answer -
Hi George.
When you did the rebuild did you clean the carbs out completely as well? With a bike that old, there is, if it is not ridden on a near daily basis, the posibility of fuel residue buildup in the carbs. This could cause the moving portions of the carbs to stick either when opening or closing or both.
Also, the carbs may need to be resynchronized.
Start with that and let me know what happens.
Good luck.
FALCON
:::FOLLOW UP:::
Can the carbs be re-synched without any special tools or is a dealer repair the best way to go? And yes, when I rebuilt the carbs I soaked in carb solvent and blew out all passage ways with carb cleaner just like with an auto carb. I also checked for ease of movement of all internal and external parts of the individual carbs and all linkage once the carb assemblies were secured to the heads (I was prof. trained in auto repair, but all these little carbs trying to work together are new to me!) Thanks again! George
AnswerHi George.
Well, usually the only Automotive mechanics that have experience with multiple carbs are the guys that work on the dragsters and other racing cars, but it sounds like you're doing just fine with it.
Did you check the rubber components of the carbs for any damage, dry rot, etc.? I don't think that it is an extremely likely possibility, but if there is a problem with that, then it could cause problems.
Also check the idle speed. It should be at about 1000rpm +/- 100rpm
As far as synching the carbs, this is something that is part of routine tune up proceedures, so it needs to be done every few thousand miles.
You need a carbeurator synchronizer (Carbstyx is the easiest to use and least expensive), a very short, standard screwdriver or long-reach 90* angled screwdriver and the repair manual. The adjusting screws are accessed from under the carbs. You can see them with the help of an inspection mirror.
Basically, you just need to make sure that, at idle, they are all pulling the same vacuum together.
Good luck.
FALCON
