When to rebuild the top of a Honda CR125?
The top end involves the pistons/rings and all of the replaceable parts above the base gasket. It’s time to rebuild the top of your Honda CR125 once the parts reach their service life or are simply worn out. Service life depends on a variety of factors including how hard you ride, the bike’s age, and the quality of parts, among other things.
Is it rare for a piston to fail again?
It is not at all a rare occurrence for repairs to be carried out and then for the same damage to occur again and the same components to fail again because, although the damaged parts were replaced, nothing was done to eliminate the cause of the problem. For this reason a certain amount of “detective work” is always needed to track down the fault.
What causes a piston to crack on a MX bike?
In most cases the top of the cylinder and the occurs. Most mx bikes have head stays mounting the head to the frame. Over time the head can become mount. It’s important to check for warpage of the head every time you rebuild the top end. cylinder clearance was too great. When the piston is cracks and eventually shatters.
How to tell if a piston liner has been damaged?
Cylinders and cylinder liners64 Longitudinal cylinder liner cracks 65 Torn off fl ange on the cylinder liner 66 Cavitation on cylinder liners 68 Irregular sliding surface wear 70 Bright spots in upper sliding surface area 72 Cylinder liner fracture due to hydraulic lock 74
Is the 01 CR 125 jetting a bad idea?
FMFs reccomendation of 50/50 race/pump gas isnt a bad idea-the 01 CR is sometimes on the verge of detonation but if you have good pump gas you may be ok-how has the last piston looked like?Is the top edge kind of worn away and has little pin markes on the top of the piston? A easy way round the detonation problem is to use 2 head gaskets.
In most cases the top of the cylinder and the occurs. Most mx bikes have head stays mounting the head to the frame. Over time the head can become mount. It’s important to check for warpage of the head every time you rebuild the top end. cylinder clearance was too great. When the piston is cracks and eventually shatters.
Cylinders and cylinder liners64 Longitudinal cylinder liner cracks 65 Torn off fl ange on the cylinder liner 66 Cavitation on cylinder liners 68 Irregular sliding surface wear 70 Bright spots in upper sliding surface area 72 Cylinder liner fracture due to hydraulic lock 74
It is not at all a rare occurrence for repairs to be carried out and then for the same damage to occur again and the same components to fail again because, although the damaged parts were replaced, nothing was done to eliminate the cause of the problem. For this reason a certain amount of “detective work” is always needed to track down the fault.