Fred1956
New member
Hey to all and thanks in advance,
I just put head and carb back on my '06 EC250 after RB Designs head and carb mods. Followed all instructions per Ron's sheet. Bike feels crisp after warming up but I have a couple of issues/concerns. I got to ride some single track for about 45 minutes last night before it got dark so...This may be jetting but may be something else. When rollong the throttle on from idle in medium speed, any gear, flat ground, I hear a clatter noise. Not a tinny sound but deeper. Could it be pinging? Or could it be piston "slapping"? I could not find a way to make it stay "in the noise" it only happens for a double blink but it is there. I did not pull the cylinder as the bike ran very good before, but like most of us I was trying to get a little more.
Also it seems to have lost a little low end, just the opposite of expectations. It started with a 40 pilot and Ron put in a 42, I have the RB air screw and it is at 3/4 turn out, it had a N1EF needle set in the middle and sheet now says CEK-3, with 178 main (same as before). The low end feels flat and doesn't respond to the clutch as it did before. It doesn't just fall flat but seems more like a 125 with out the clutch feather boost. I was at around 1200 feet above sea level. Bike runs great through the mid and top, just seems a little 'dead' off the bottom.
Any ideas or suggestions?
P.S. I may be getting fooled, while the EC was down I've been riding an '06 GasGas TXT 280 Pro trials bike and that thing is a locomotive off idle so... something else to consider.
I just put head and carb back on my '06 EC250 after RB Designs head and carb mods. Followed all instructions per Ron's sheet. Bike feels crisp after warming up but I have a couple of issues/concerns. I got to ride some single track for about 45 minutes last night before it got dark so...This may be jetting but may be something else. When rollong the throttle on from idle in medium speed, any gear, flat ground, I hear a clatter noise. Not a tinny sound but deeper. Could it be pinging? Or could it be piston "slapping"? I could not find a way to make it stay "in the noise" it only happens for a double blink but it is there. I did not pull the cylinder as the bike ran very good before, but like most of us I was trying to get a little more.
Also it seems to have lost a little low end, just the opposite of expectations. It started with a 40 pilot and Ron put in a 42, I have the RB air screw and it is at 3/4 turn out, it had a N1EF needle set in the middle and sheet now says CEK-3, with 178 main (same as before). The low end feels flat and doesn't respond to the clutch as it did before. It doesn't just fall flat but seems more like a 125 with out the clutch feather boost. I was at around 1200 feet above sea level. Bike runs great through the mid and top, just seems a little 'dead' off the bottom.
Any ideas or suggestions?
P.S. I may be getting fooled, while the EC was down I've been riding an '06 GasGas TXT 280 Pro trials bike and that thing is a locomotive off idle so... something else to consider.
