BRM's Flexible Honing, Surface Finishing, and Deburring Blog Blog

BRM's Flexible Honing, Surface Finishing, and Deburring Blog

BRM's Flexible Honing, Surface Finishing, and Deburring Blog is the place for conversation and discussion about how to solve difficult finishing problems. For over 50 years, Brush Research Manufacturing (BRM) has helped customers use brushing technology to clean, rebuild, and resurface components ranging from engine cylinders to brake rotors to flywheels to firearms. BRM's Blog on CR4 provides real-world examples of how flex hones and wire brushes work. It also evaluates related technologies and invites questions from the community.

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Flexible Honing for Motorcycles – CRF450X Engine Rebuild

Posted September 24, 2012 10:00 AM by Brush Research

In the history of off-road motorcycles, the 2005 CRF450X was Honda's answer to the Yamaha 2001 WR450F. Both big-bore bikes captured the hearts and minds of off-road riders, but Honda's belated entry packed enough power to climb the most challenging hills. Like the R version, the 450X featured Honda's 4490-cc, liquid-cooled, four stroke-engine and Unicam valve actuation. Instead of using multiple cams, however, the 450X featured a single cam that actuated lightweight titanium intake valves. Inside the bike's Nikasil-lined cylinders, lightweight pistons with a 12.0:1 compression ratio offered higher RPMs.

Engine Maintenance

According to an off-roader named Ehsan at the South Bay Riders on-line forum, the intake valves on his 2005 Honda CRF450X "got tight as they are known to do" and required a pre-race adjustment. Over the course of a weekend, the biker tore down and rebuilt his entire motorcycle engine. In the process, the biker inspected the pistons and cylinders. Both engine components were worn, but the Nikasil-lined cylinders "looked excellent with a visible crosshatch and no scoring at all." Nevertheless, Ehsan reported that he "used a ball hone on the cylinder and gave it a nice fresh cross-hatch to help the piston rings seat properly." Well-done, Eshan!

Ball Hones for Bikes

Engine builders sometimes call our Flex-Hone tool by other names (including ball hone), but you know you've got the best if it says Brush Research Manufacturing (BRM). Since 1958, our California company has provided American-made brushing technology to industries and individuals who need to solve tough surface-finishing problems. So whether you're an auto parts manufacturer that wants quieter brake rotors or a hobbyist who rebuilds motorcycle engines, you'll find that the Flex-Honeis versatile, cost-effective, and easy-to-use.

Cylinder Wall Deglazing

For bike builders like Ehsan, the Flex-Hone can be clamped into the chuck of a handheld electric drill. Always use BRM's flexible honing tool with a lubricant, and for best results choose Flex-Hone oil. Although our cylinder honing tool can be used in a variety of surface finishing applications, Ehsan's engine rebuild required cylinder wall deglazing. This promotes lubrication, reduces oil consumption, and helps seat new piston rings. By restoring the cross-hatch pattern that's worn away over time by the reciprocating movement of the pistons, cylinder wall deglazing helps engine oil to adhere properly.

Motorcycle Talk

Are you a mechanic who rebuilds motorcycle engines? If so, we'd like to hear from you. Honda fans now know how to use the Flex-Hone with a Honda CRF450X. There's also a blog entry about the Kawasaki ZRX1200. Will we hear about the Yamaha WR450F next?

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#1

Re: Flexible Honing for Motorcycles – CRF450X Engine Rebuild

09/25/2012 11:49 AM

? How many time do we have to see this flex hone advertisement? This is just another form of the same advertisement we have seen almost weekly for a while now. This may be a quality product but it is still an advertisement for it.

Can I advertise my products on here if I include a small story of its use?

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