750 Posted September 7, 2014 Share Posted September 7, 2014 Can anyone help diagnose the cause of this? I've had the carbs off, I'm guessing there's something wrong with the slides, especially the one that doesn't move. Could this be down to balancing issues? Thanks! http://youtu.be/xHzxtqauezs?list=UUYDBUwcKtSO3xH17OdouAsg Link to comment Share on other sites More sharing options...
FlyingDeck Posted September 7, 2014 Share Posted September 7, 2014 Try gently pushing the slide with a screw driver to see if it is stuck. Also of you remove the air box and plenum (the plate between the carbs and air box! You can remove the carb top and then remove the slider. If slider is not stuck try blowing compressed air down the various small holes visible once slider is removed. All this can be done without removing carb bank. Good luck! Link to comment Share on other sites More sharing options...
750 Posted September 9, 2014 Author Share Posted September 9, 2014 The diaphragms are junk. Removed the carbs and they're all loose, must have been something in the fuel as I cleaned the carbs fully not so long ago. Ugh, more money to be spent on replacement parts then! Link to comment Share on other sites More sharing options...
Member Contributer YoshiHNS Posted September 9, 2014 Member Contributer Share Posted September 9, 2014 I'm very confused. What do you mean by "they're all loose" ? They are rubber and are supposed to be nice and soft and pliant. Only issue would be if they hardened or have any tears in them. Link to comment Share on other sites More sharing options...
mcrwt644 Posted September 10, 2014 Share Posted September 10, 2014 if your diaphragms were junk, you'd know it. Those you have are not. It would appear to me that the needle is stuck on the one carb and nothing more. Like it was mentioned, take a screw driver and gently push the slide up. I'll take a guess and say there is corrosion of some sort on the needle. Link to comment Share on other sites More sharing options...
FlyingDeck Posted September 10, 2014 Share Posted September 10, 2014 The diaphragm is in the pic on the left. The cylinder with a rubber diaphragm at one end and a needle at the other. Th access remove the four screws on the cover (top right in picture) If indeed the needle is stuck you can release it from the main jet with a Phillips head screw driver through the cylinder opening by applying a half turn to the needle retailer. Then use some Lilongwe nosed pliers to gently work it free. Hope this helps. Link to comment Share on other sites More sharing options...
Member Contributer Dutchy Posted September 10, 2014 Member Contributer Share Posted September 10, 2014 Lilongwe nosed pliers... Must these pliers come from the capital of Malawi? or is Lilongwe the aboriginal word for long?? Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted September 10, 2014 Member Contributer Share Posted September 10, 2014 Me think a total rebuild is what you need. But it will be a great bike . Link to comment Share on other sites More sharing options...
750 Posted September 13, 2014 Author Share Posted September 13, 2014 Haha, trust me...they're junk. The rubber diaphragms have lost their shape, there's a lot of slack between the outer ring and the base at the slide - so little so no suction is happening. The diaphragms should move all the way up without issue - this isn't caused simply by a 'stuck needle', that's one of many symptoms that can stop the slides from moving. I just needed to remove the carbs to confirm this which has now been done. So some used carbs are en route from a relatively low mileage bike which should solve the issue. I'll upload another vid once they're on to prove the point. Link to comment Share on other sites More sharing options...
Member Contributer taglicious Posted February 19, 2015 Member Contributer Share Posted February 19, 2015 So much rust.. Link to comment Share on other sites More sharing options...
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