SP1 Stone-Type Glaze Breaker

SP1 stone-type glaze breaker for V-twin motorcycle cylinders, featuring three cutting stones and adjustable pressure control for consistent honing. Works with any standard electric drill to remove glaze before ring installation or reboring.

Features

• 2" to 7" adjustable range (50.8–177.8 mm)
• Three stones for faster glaze removal
• Adjustable stop-collar with two range settings (2–4" and 4–7")
• Easily compressed one-hand operation to prevent vertical scratches
• 180 grit stones included
• Compatible with any electric drill

Specifications

• Brand: SP1
• Manufacturer Part #: SM-12153
• UPC: 191361193262
• Weight: 0.84 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits V-twin motorcycle cylinders with bore diameters from 2 to 7 inches.

Frequently Asked Questions

What size cylinder does this fit?

Adjustable range from 2" to 7" (50.8–177.8 mm). The stop-collar lets you lock in either 2–4" or 4–7" range quickly.

Can I use this with a cordless drill?

Yes — works with any standard electric drill, corded or cordless.

Will this scratch my cylinders?

One-hand compression allows you to lift the tool easily while the spindle turns, minimizing vertical scratches that could damage the cross-hatch pattern.

What grit stones come with it?

180 grit stones are included. These are suitable for removing glaze on stock rebuilds.

Do I need special training to use this?

No — it operates like a standard hone with an electric drill. Follow proper honing techniques to maintain the cylinder wall finish.