Wanted to synchronise the carbs on my Yamaha RD350. If carbs are not in sync, then one cylinder will work more than the other and reduce the overall power output of the engine.
Good job man, keep them coming, I need to re-jet my carbs but its such a pain to get to them, thinking about getting a pouch gas tank and using it in place of the actual tank, that way it will be easier to get to the carbs to change those jets out.
Thanks Arup 😃 yeah, removing the carb jets is a pain. Having a pouch tank will be super convenient. Changing jets feels a bit like rocket science to me. May be will give it a try in the future.
Was the left slide sitting further up already from the left the idle screw being further in? I have always started with setting the idle at between 1800, 2000 rpm with one plug wire off, then the other. The. set the idle by turning each equally out (always move both the same amount) until 1500 rpm idle is achieved-THEN sync which ensures both are at and starting from the same height, no?
This video was just about the syncing and making sure the slides go up and down in sync. What you said is right, syncing should be done after setting the idle and making sure both slides are at the same starting position inside the carb barrel
Great video. Is it really this easy? I've heard so many people complain about the ass pain of syncing carbs. Love your channel...so easy for a beginner like me to learn. (I've got a 75 rd350!) Keep it up, please!
The ass pain is dealing with the boots to the air box. This is a very clever way to sinc. I was taught to put a finger in each carb and feel the slides lift. I like your idea more.
How about a how to on carb tuning? I just got mine all bolted back together after changing the crank seals, boring the cylinders, new rings, and pistons. It'll fire, and seems to run smoothly, but won't stay running? Idle is supposed to be 1,300ish correct?
I will do a video on carb tuning. I am currently rebuilding my engine as well. I would troubleshoot your problem this way: 1. Clean carbs as there might be dirt in it, clean the pilot and main jet thoroughly 2. Check the air:fuel screw and make sure it’s turned 1.5 turns out from closed position 3. Check spark timing, each spark plug must fire 2 degrees before piston reaches TDC 4. And yes, the idle screw must be turned so the engine idles between 1000-1300 rpm
If there is no equal action, then you will lose engine power. One cylinder will carry the load of the other cylinder. So make sure the carbs are synced!
