Grant demystifies the black art of Tire Changing and Repair to help you STAY on the road! "Very informative and practical." See the trailer 
Cotton or synth sweat-wicking t-shirts with the Horizons Unlimited logo on the front and a snappy slogan (changing every year) on the back.
Show your route on your panniers. Great conversation starter when you meet people on the road!
Motorcycle and travel books to inspire and inform you!
ll 5 DVDs with a custom printed slip case. "The series is 'free' because the tips and advice will save much more than you spend on buying the DVD's."
|
|||||||
| Suzuki Tech Suzuki Tech Forum - For Questions specific and of interest to Suzuki riders only. Questions comparing which bike is best etc go in the "Which Bike" forum. |
 |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
11 Jun 2007
|
|||
|
|||
|
vacuum leaks?
Im having a hard time getting my b400 to stay running under 3k rpm. What is the best way to check carbs for possible vacuum leaks, I know they definately need syncd but its kinda hard to do if the bike wont run at a normal idle
|
|
#2
12 Jun 2007
|
|||
|
|||
|
I've heard it suggested that spraying carb cleaner (and various other fluids) around the manifolds and sealing points while the bike is at idle can identify an intake leak...rpms temporarily increase.
|
|
#3
12 Jun 2007
|
||||
|
||||
|
What's a B400? I may be able to offer some advice if I know.
Regards Nigel in NZ
__________________
The mouth of a perfectly contented man is filled with  . -- 2200 BC Egyptian inscription
|
|
#4
12 Jun 2007
|
|||
|
|||
|
Nigel: Bandit 400
I also would recomend the spray intake rubbers method. Best stuff to use is cold start aid spray from the automotive dealer or ether from the pharmacist (working ingredience is the same, decide what's easier to get. The cold start spray is available everywhere in cold and arctic climates. The pharmacist might ask questions  )
|
|
#5
13 Jun 2007
|
||||
|
||||
|
Thanks!
After I posted that, I figured as much. I'm wondering if it might be more than an air leak. As a four cylinder, the chances are it is unlikely that more than one inlet manifold would spontaneously have a leak, unless someone has not assembled the carbs properly. I would expect it to idle at better than it is. It is possible, but I would start looking elsewhere first. What sort of carbs does the B400 have? CV or what? If you can get the airbox off and see down the throats (a mirror helps) sometimes you can get a rough sync by getting someone to open the throttle and see if the sliders start moving together.
Here in NZ, we can buy a brand of cold-start that has about the most descriptive name of any product I have seen. It's called "Start, Ya Bastard"!!! http://www.horizonsunlimited.com/hub...ilies/rofl.gif  Regards Nigel in NZ
__________________
The mouth of a perfectly contented man is filled with . -- 2200 BC Egyptian inscription
|
|
#6
13 Jun 2007
|
|||
|
|||
|
the slides are all working together it seems, perhaps they may need thoroughly cleaned would that cause said problem?
|
|
#7
14 Jun 2007
|
||||
|
||||
|
I have yet to see a problem caused by unclean slides. That would most likely make them stick open and cause reving. Has the bike been left for a period of time unused? Say for 6 months or more? If so, then some fuels can evaporate in the carb float bowls and leave a varnish-like residue that can block off the tiny fuel galleries that feed the idle fuel circuits. Dismantling, and blowing out with compressed air can fix it but if it really badly blocked, using a fuel additive like Seafoam or heating the carb in a 50/50 mix of water and Yamaha carb cleaner for 20 minutes then washing in water and blowing with air will almost always do the trick.
Regards Nigel in NZ
__________________
The mouth of a perfectly contented man is filled with . -- 2200 BC Egyptian inscription
|
|
«
Previous Thread
|
Next Thread
»
| Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests) | |
| Thread Tools | |
| Display Modes | |
Linear Mode
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| gasket leaking ...big problem or not? | Polly | Yamaha Tech | 81 | 26 Jun 2007 11:25 |
| Help Please - 34L "popping" | jim | Yamaha Tech | 4 | 2 Apr 2007 13:20 |
| Bings, 40mm constant vacuum | John Roberts | BMW Tech | 6 | 5 Mar 2006 06:24 |
| oil leaks | gwel | Yamaha Tech | 2 | 24 Feb 2006 23:02 |
| XT oil leaks | martync | Yamaha Tech | 1 | 17 Oct 2003 13:37 |
All times are GMT +1. The time now is 08:27.
