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OK, guys, here is the answer. I know it sounds hard to believe, and this is why I never even thought of changing the oil. I did look at the sight glass and the oil looked ok, i.e. not frothy or milky, but then again this bike does not have a water cooling system so should not have expected to see wa...

Brummbär hat geschrieben:Maybe a lack of valve clearance will prevent valve closure causing leakage?

Nope, the valves were not the problem.

Acacius hat geschrieben:<delurk>

Dodgy rectifier?
(going for the really unlikely here...)

Sorry, but wrong

Guys let me know if you give up and want the answer.

Hi, I had a similar behavior after reassembling the carburetor. It was caused by a leakage in the vacuum system, unfortunately I forgot to attach the vacuum hose to the fuel tab. :oops: Greetings Manuel I can confirm that all the reassembly was in my case was done correctly, nothing missing or left...

AoS hat geschrieben:Okay, another try. Mice living in the airbox?

Dirk,
hopelessly lost and hoping that others have a better guess. Where are the Englsich speaking people?

I can tell you that there were no animals of any kind involved.

Let's have a try. It must be something not fuel related since you haven't thought of it and the carbs were your guess. Is it an electrical problem, like a failure of the voltage regulator when it gets hot? Dirk Hi Dirk, It wasn't an electrical problem and not really a fueling issue. Do you guys giv...

That's too hard. I don't know your experience, so I can't tell what you have ever heard of or not. Can't you give us some hint? The point is not my experience but the people on the board :roll: This problem was certainly not anything one would normally think of. I'll happily share the solution with...

Well, the problem is fixed, but it's nothing I've ever heard of before, or would have guessed.
I'll PayPal $10 to the person who guesses the correct answer

I'd just throw out all the unnecessary parts to reduce possible origins for the error. But I can't imagine that the vacuum system affects idling in the way you describe. There is no temperature sensor, and the sensor on the butterfly valves just registers the position. Together with a gear sensor t...

There are two different systems we have to speak about: On the one hand there is the vacuum system that regulates how fast the piston valves rise, especially in gears 2 and 3, for the purpose of noise reduction. The solenoid, the sensor and many of the vacuum tubes are related to that system. The s...

For my unstanding unfiltered air does not enter the carbs through the air vent hose. The carbs are working like the venturi principle. So the carbs need an ambient air pressure to adjust the correct air and fuel flow. When you plug the air vent hose, the carbs are adjusted with a static ambient air...

Guys, thanks a lot for the clarification. I'm never comfortable having unfiltered air coming into the engine or carbs so I was wondering does anyone see a problem with plugging this hose into the currently unused hole in the airbox as shown in blue in the updated diagram? http://i17.photobucket.com/...

On a related topic, has anyone here removed the silly PAIR system? I have done it on my other bike which has EFI so it was easier to figure out which hoses and parts where not needed :roll: I would really appreciate any advice from people who have successfully removed the useless PAIR system on the ...

Thanks for the suggestions guys, but I don't think they are correct. @Vaty, I already have the VTV all hooked up, and the only other hoses in the area are accounted for. The one running down towards the back wheel connects to the fuel tank (water release I think it's called in the manual). The secon...

Hi all, Hope you can help me, like a total noobe I forgot where one of the hoses is supposed to reconnect to. I pulled out the carbs to check them over, to try to fix a rough/poor idle problem. Now that I am trying to hook the carbs back on the bike I can't seem to figure out where one of the hoses ...