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Have you done a compression test on it.
Quote from: moorey on November 24, 2018, 10:39:15 PMHave you done a compression test on it.No not yet but this problem has happened suddenly and all 4 plugs wet + thought it's unlikely that valve/bore problem on all 4 pots Sent from my Moto G (5) using Tapatalk
Hi Phil, which carbs are you running, PD41’s with an accelerator pump?
Ok, mine started to get difficult to start, I found that giving the throttle a couple of sharp twists to make the accelerator pump squirt fuel into the intakes and then pressing the starter button regained instant starting, I think maybe my primary circuit is blocked, really must get around to taking carbs off and sorting, obviously you can’t try that because you don’t have an accelerator pump.First I would try new plugs because it’s easy, but I think you’re issue could be fuelling , so I would..1. Check the choke mechanism is working correctly 2. Check float heights and check that floats are not Punctured3. Check the needle valves are seating/operating correctly 4. Check the carbs are receiving fuel from the tank and the tank isn’t forming a vacuum.5. Give the carbs another clean.Then, check the inlet rubbers for leaks.Then alter your float heights away from the standard setting, if it gets better or worse you might be on to something.Then because my bike ran badly with Pods until I grafted the original intake trumpets onto the front of them which makes me think pods are a bit crap I would get some velocity stacks, this doesn’t fit with your problem suddenly appearing but I think you’ll find the bike generally runs better with stacks, plus they look nice!Also check your timing with a strobe gun so that you know the advance/retard is working It will most likely be none of the above of course 🙂
I've only been putting half a gallon in at a time as I have been waiting to get the CR replica fuel tap back from the guy who makes them (as it was leaking) and knew I would need to drain the tank. I have a cr250 motocross tap on at the moment (its not a tap issue as I've had that fitted since start up).
I use super unleaded in all my bikes to avoid the thernol related problems - until it gets put in that too!Seemed to have sorted problem (see previous post) - duff plugs.