paul Posted July 4, 2005 Report Share Posted July 4, 2005 I'm not sure if this has been mentioned before but on all of the 04 and 05 rev 3 i've seen so far the float bowl overflow pipe has no plastic pipe fitted to it. All previous models seem to have one fitted. When i purchased my 04 rev3 second hand the pipe was not fitted and the carb never leaked. So after a few months I fitted a short one of about 3'' and it started leaking. I ran the bike with it fitted for a few weeks and then fitted a longer one which terminated at the same point as the gearbox breather. The leaking became even worse so mid practice i removed it completely and now it does not leak at all. Seems to me that the pipe is causing a siphoning effect. I appologise if this has been mentioned before. Any comments. Quote Link to comment Share on other sites More sharing options...
clarkp Posted July 4, 2005 Report Share Posted July 4, 2005 ... sigh ... do this... bookmark this... Not only mentioned before, but is a current "Topic Title" Please update your profile to show your location. Quote Link to comment Share on other sites More sharing options...
paul Posted July 5, 2005 Author Report Share Posted July 5, 2005 Clarkp, Thanks for your reply but I said that the fuel was leaking out of the float bowl spigot and not the side vents. I have looked at your links and I can only find one references to the float bowl spigot (unless I've missed something which is possible/probable as there is rather a lot on this subject). Which suggests connecting it to one of the vent spigots. I live in the south of England where in winter the bikes are subjected to vast amounts of mud and weekly wash downs. I fitted the pipe as I was concerned that it was vulnerable to ingress of dirt on wash down. Initially I presumed that the original one had just fallen off. It wasn't till I'd looked at a few dozen others that I realised that 04/05 didn't have them fitted. A friend of mine with an 03 has now removed his, fitted as standard tube, and cured his problem. My 04 carb float settings have not been adjusted since new but is very close to the adjustments shown in one of your links and not like the, parallel to carb body, setting shown in the handbook. Also with the tube fitted and the tap off when I used an air line to remove dust from around the carb area the carb emptied its entire contents out of this tube. Obviously due to the perfume spray effect and then the siphoning effect once the fuel had started to flow. I presume that with no tube connected the spigot does not hold enough fuel to create a siphoning effect. I'm sure Clarkp you will tell me that its all been said before but if it helps anyone at all then I think it's worth it. Quote Link to comment Share on other sites More sharing options...
clarkp Posted July 6, 2005 Report Share Posted July 6, 2005 Paul... sorry about the knee-jerk response - my apologies. Have you tried fitting a larger diameter tube that has the end cut off at an angle similar to what is shown in the links? The larger diameter and the angle of the cut might stop the siphoning action (likewise, you might drill a small hole on the "more protected" side of the tube to break the siphon while protecting the end of the spigot from mud and washdowns. Again, sorry about the flame... Welcome to the group. Clark Quote Link to comment Share on other sites More sharing options...
paul Posted July 6, 2005 Author Report Share Posted July 6, 2005 (edited) Hi Clark, No need to apologise. How could I be offended by a fellow trials rider. Especially one from the USA. Bernie Shreiber was my hero and I had the privilege of riding in a trial with him in 1979 over here in the UK. Guess what he won it on 3 marks lost where as i came 12th on 32 riding my 1972 Bultaco(which I still own & ride). It was winter and he was wearing five scarves , two pairs of gloves and the biggest coat you have ever seen. Was also magic watching him ride he even seemed to like the mud. The larger pipe and hole is a good idea i'll try it when I get the chance. Another mod that i've done is to fit a tube to the rad cap and run it down under the engine. I didn't fancy corrosive coolant all over the electrics and all the connectors situated around there(this is my first water cooled bike). Its suprising how much vapour and coolant is expelled after you have topped up to the recommended level. Takes a couple of rides before it finds its own level. Small amounts of vapour can still be seen in the tube two months after i last checked the level. I've seen a couple of new Betas which have had overheating problems resulting in coolant all over the place. Can't do it a lot of good hosing off the coolant from the electrics either. I think the bore of the tube is large enough not to cause a problem if the coolant needs to get out quickly. Clark i'm sure you'll tell me that this has also been mentioned before(Just Kidding) Paul Edited July 6, 2005 by PAUL Quote Link to comment Share on other sites More sharing options...
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