Do you have to replace rings on a dirt bike?
If you are using a new piston and rings you do not have to check this. If the gap is too much, even with new rings, you will need to replace the piston. Everybody seems to think a new set of rings should cure everything. I wish it was true… but it’s not. I would say 95 % of the time, on a dirt bike, you will need to bore it oversize.
What happens when you put in a new piston on a motorcycle?
If it looks like a rat has been chewing on it watch out. It means that the bearings in the bottom end are starting to go. If you put in a new piston it will just be ruined as more bits of bearing shed by the lower crank and rod bearings. The cure? Rebuild the bottom end. Be sure to check the cylinder for any rust pits.
Is it a cast or forged piston in a motorcycle?
Is it a cast or forged piston. Is the engine air or water cooled. Is the engine two or four stroke. A small (50mm bore) cast piston, 4/stroke may have half a thou (.0005″ or .0127mm ) piston clearance, while a big, forged piston, 2/stroke (73mm, 2.874″) can need .003″ (.075mm) or more.
What makes Wiseco forged pistons the best?
Precision Forgings, state of the art CNC finishing, ArmorGlide® skirt coating, complex dome profiles, and optimized shirt shapes are only a few features that make Wiseco forged pistons the best available.
Where is the serial number on a pentonparts KTM?
1976- 400 1982- 420 1988- 350 The KTM motor serial number also contain a code that identifies what year and what size the motor is. On the 1972-80 motors these numbers can be found on the ignition side – just below the cylinder fins. On 1978+ motors the number can be found on the clutch side – on the bottom front.
What kind of pistons do dirt bikes use?
We offer Dirt Bike parts for Honda, Kawasaki, KTM, Suzuki, Yamaha and more! Precision Forgings, state of the art CNC finishing, ArmorGlide® skirt coating, complex dome profiles, and optimized shirt shapes are only a few features that make Wiseco forged pistons the best available.
Where is the serial number on a 1972 KTM?
The KTM motor serial number also contain a code that identifies what year and what size the motor is. On the 1972-80 motors these numbers can be found on the ignition side – just below the cylinder fins. On 1978+ motors the number can be found on the clutch side – on the bottom front. The first three numbers are the code.
How big is the piston on a vertex KTM?
This variation in sizing, a mere 0.004″, allows the piston to be perfectly sized to the cylinder for maximizing power and performance while reducing blow-by and oil consumption. Note: Vertex offers A, B, C, sizes so that the customer can properly fit each piston to the cylinder.