Hello!, My Kawasaki KMX 125 (B11). I've just had a 0.5mm Re-bore, Nicosil plate, Over sized piston-rings Etc... (Due to seizure because some Muppet didn't Aline the piston rings correctly!) The bike has been run-in and it still doesn't feel quite right... IE: small Knocking when rolling on & off the throttle when coasting?, occasional slight lag in power delivery almost like the clutch is being slipped?, coughing & spitting at 0-1/8Th Throttle (IE: When traveling At low speeds in traffic with the throttle just Cracked!!!???...(K&N Fitted) What Can be going on? Compression is fine, New plugs, seals-gaskets Oil changed all-round! Any help will be Greatly received, Ryan.
Hello M8, I took it to a 2 Stroke garage, he took apart & checked bearings-bottom-end! He told me all was fine!!! I'm well gutted because it cost me £450.00!!!Hello M8, I took it to a 2 Stroke garage, he took apart & checked bearings-bottom-end! He told me all was fine!!! I'm well gutted because it cost me £450.00!!!
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hi buddy you bin ripped off there £450 maybe it is your clutch making that noise my mates kx125 makes a horrible knocking clutch noise try looking at the clutch basket also the piston maybe slapping the head im not sure as this isnt common for kmxs
hi buddy you bin ripped off there £450 maybe it is your clutch making that noise my mates kx125 makes a horrible knocking clutch noise try looking at the clutch basket also the piston maybe slapping the head im not sure as this isnt common for kmxs
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Install a new cylinder and re-jet the carb back to stock. If the ported cylinder has been bored you will need new piston and rings also. I would re-jet the carb first and see if that change will suffice in the fuel economy area. Changing out the cylinder etc., is costly. Check the front and rear sprockets. If they are not the stock sprockets, ( 14 tooth and 48 tooth ), replace with stock. Please rate my answer.
It looks like Babbitt's has the parts. Pistons and rings are sold in 3 sizes; standard, .020 oversize and .040 oversize. I would suggest you have the cylinder bored and install new piston, rings and needle bearing.
Go to www.babbittsonline.com/pages/parts/viewbybrand/default.aspx You might want to install new crank bearings and seals as well but that involves an engine teardown. Please rate my answer. Thanks.
If the rattle is coming from the barrel / head area then it may well be a worn piston, worn or damaged bore / rings. The best way to investigate is to remove the exhaust, get under the bike & shine a torch up into the barrel Both barrel & piston can be inspected by removing the spark plug & slowly actuating the kick-starter
Ride safe
Bike-Doc
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Yes, but be careful not to over do it as you need to have a matching oversise piston ring. Most you can re-bore is 2 times with 0.05mm oversize total. Good luck.
hi man, I had a similar problem, so maybe I can help you. it can be connected with air filter. under your seat there should be some kind of cover on the air filter. just remove it. I've noticed this problem when I unrestricted my KMX 125. the hole on the cover on the air filter is too small.
Check the piston to cylinder clearance.You very well could have wore either the piston and/or the cylinder. Also check the rod for up/down play.Running out of oil could have ruined any bearing in the motor.
Hello M8, I took it to a 2 Stroke garage, he took apart & checked bearings-bottom-end! He told me all was fine!!! I'm well gutted because it cost me £450.00!!!
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