stu109

Out today on my 2013 Evo 4T and noticed a strange noise. Sounded like a chain slapping on metal. Only occurred in the higher gears, 1st, 2nd, and 3rd all normal. Regular "clack clack clack" about twice a second. Seemed to get a litter quicker with speed and stopped with the clutch engaged. Anyone got any ideas?

Hi Have you tried contacting Joël Corroy? He has helped me out with questions on my 323. www.trail70.fr

Got the springs off (I use a loop of picture wire) but could not get the pipe off. May try warming it all up by running the engine. If that does not work will remove the manifold. Only looking to clean and paint it so won't rush on the manifold as it looked as if the rad needed moving to get at the bolts.

Changed the oil today, and the spark plug. Oil looked good and clean and nothing untoward in the filters. Looking to change the coolant. Is it best to pull off one of the hoses or is there a drain plug? Would like to take the exhaust header pipe off to give it a clean up. Manual suggests it is held on by to springs to the manifold, Could shift it though. Anyone got any suggestions for detaching the pipe from the manifold?

Looking at the jet table in the manual the richer "competition" settings for the 300 are 120, 27.6 and 60. The only variance from factory jets is the slow jet that goes from 17. to 27.5. The 127.5 looks to be the competition main jet for the 250. May look at my jets and needle setting at some time but not rushing to take the carb to bits as it runs so well at the moment. Has a look under the rear mudguard yesterday. (Mud guard seems poorly named as did not prevent me getting splattered in mud when riding). Air filter was full of debris and there was a small amount of muddy water in the bottom of the air box. Do the clear plastic filter covers work? I see it the manual it suggests replacing the piston (although not the rings) and the water pump shaft and seal at 80 hours. What do you make of this?

Yesterday took delivery of a 2013 3004T and took it for its first trial today. The event was a real mudfest as it had been raining all night, bu what a ride from the bike. Took me a little while to get the feel of it but the grip was fantastic and you just fly up muddy climbs. Managed to complete sections that I would have had no chance on on my 125 Rev 3. I procrastinated a good deal about getting a different bike. Kept telling myself its not the bike its the rider. But I am so glad now I made the change. Did contemplate the Montesa 4RT but could not find a good one at a reasonable price. Heard good things about the Beta on this forum so decided to give that a go. Couple of technical things that perhaps some other riders might be able to advise on: The fuel tap has two positions according to the operating manual, one for normal running, and one for starting/filling the carb after have fall. Have used both of these, but is tap straight down anything, a reserve perhaps? On over run I get a "phut phut" from the exhaust, is that normal? Thanks

Hi Thanks for all your suggestions. I have tried the WD 40 spay but nothing. Eventually I bought a new, bigger, pilot jet. Went from a S42 to S44. I don't think the mixture was lean but hoped that a bigger jet might be less prone to blocking. Recleaned the carb, fitted the new jet and have just managed to get round a trial with no issues. Not sure if there is/was something kicking around inside the card or if I was getting a new blockage each ride. Airbox looked clean inside after the trial and I have already cleaned out the tank, the tap filter and fitted a new in-line filter so difficult to see that it was getting freshly dirty each time out. Will continue to clean carb airbox and filter after each ride and just hope it continues to run OK. Interestingly, even though I adjusted the mixture screw to take account of the bigger jet I did feel I had a bit more zip than before when picking up from low revs, but this might just be wishful thinking. Stuart

Hi, thanks for the replies. It is running a Dellorto VHST26. I have repacked the exhaust rear section and cleaned out the mid section,

Hi I have a 2005 Rev3 125. It has all the symptoms of running lean, difficult to start, fast idle, hunting, and poor pick up on the throttle. (It has run fine previously.) I have cleaned the carb to within an inch of its life including an ultrasonic clean, replaced the crank seals, the air filter, the plug, the hose between the carb and the air box, and checked the gaskets and inlet rubber, all to little effect. It does seem to be marginally worse when the engine is hot. Any thoughts on what else I could try?