What is the stock bore of a CR125?
What is the stock bore of a CR125?
53.94
1992-1999 Honda CR125 Dirt Bike Engine Piston Kit [Bore Size (mm): 53.94 (Stock)]
What is the standard size piston?
Choosing the right piston size:
| English | Metric | |
|---|---|---|
| STD. Bore | STD. Bore | Manufactured specification size |
| + .010 | 0.25 mm | Ten thousands of an inch over manufactured size |
| + .020 | .050 mm | Twenty thousands of an inch over manufactured size |
| + .030 | .075 mm | Thirty thousands of an inch over manufactured size |
How fast is a Honda 125 CR?
120.0 km/h
With this drive-train, the Honda CR 125 is capable of reaching a maximum top speed of 120.0 km/h (74.6 mph) .
Do I need bigger pistons after honing?
Light honing [1](not a full re-bore) does not always require a new, larger piston though. Usually the engineer who re-bores the cylinder will have a specific diameter to aim for when creating the new surface and by doing so an off the shelf over-sized piston can be fitted to replace the old (smaller) piston.
Should I get oversized pistons?
Always, always, ALWAYS consider oversize pistons, even on a low mileage engine block. Do not immediately assume your engine needs standard bore pistons. With the large assortment of pistons on the market, the selection of off-shelf pistons is huge and no longer costs tons of money for non-standard pistons.
How do I know if my pistons are oversized?
If it is oversize the pistons should have a stamping that shows it. They should be stamped 030 or 30 or 03 on top near the indexing mark.
How much material does honing a cylinder remove?
in theory you could use a hone cab to take out as much material as you want. in practice normally about . 003″.
Can you just replace piston rings without honing?
More often than not, you will need to hone your cylinder when replacing the piston rings. That is because honing creates small crosshatches in the surface of the cylinder, to allow the wall of the component to retain oil and provide lubrication for the piston ring.