tombo46 Posted October 28, 2008 Report Share Posted October 28, 2008 Someone suggested to me that the carb on my 2008 GasGas 300 might be running lean, after the bike has been revving it starts to make a strange noise from the head, kind of like the noise you get when its running out of petrol. is this because the float height is set wrong? if so, how do I correct it? Thanks in advance All the best Tom Quote Link to comment Share on other sites More sharing options...
copemech Posted October 29, 2008 Report Share Posted October 29, 2008 Someone suggested to me that the carb on my 2008 GasGas 300 might be running lean, after the bike has been revving it starts to make a strange noise from the head, kind of like the noise you get when its running out of petrol.is this because the float height is set wrong? if so, how do I correct it? Thanks in advance All the best Tom Not quite sure what conditions you are describing here, yet may be what I call the throttle chop "ping"! There are two small passages in the bore of the carby that you want to be sure are clean as well, the second is the transition circuit. Operates off the pilot jet. Long story made short, not sure which pilot jet you are on, but you may consider an increase to find a change. I am on a #36 in the Sherco and still find a ping, am going to try the #38 to see how it does. Mine runs smooth otherwise, and some of this I may attribute to the alcohol blend fuels we have now, which I cannot avoid it seems. Quote Link to comment Share on other sites More sharing options...
copemech Posted November 15, 2008 Report Share Posted November 15, 2008 Just as an update, the 38 pilot seems to work well so far in my back yard testing. I was able to take the fuel screw to a range of just less than 2 turns out(optimum 1-3) and transition range ping seems to be gone, yet still smooth. If you actually look at that fuel screw taper, you can pretty well figure that it is not really doing much after 3 turns out! Some of this I just cannot explain, never would have thought it, as I have had a number of these bikes over the years and at one point ran the 33 pilots with no problem, yet the motors and the fuel has changed! Oh well, I put off the issue for many months thinking a change from the 36 to a 38 would not make a difference, count me wrong! I am running the Boyesens as well, which are a bit more sensitive it seems, yet smooth off the bottom. Of course, this type of thing may well vary from bike to bike and carb to carb. But as things go, most are similar with same type, and even a Gasser as compared to the Sherco for that matter. A Dellorto is just that, nothing special but works! Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted November 15, 2008 Report Share Posted November 15, 2008 Have you checked the banjo filter? Float height 18.5 Quote Link to comment Share on other sites More sharing options...
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