Return of the Cafe Racers - Smooth Operator – Scales Studio CB750K

Smooth Operator – Scales Studio CB750K

Last time we heard from Trever Scales of Scales Studio in Texas he’d just completed his Benelli racer inspired Yamaha RD250. Trever and his business partner, known only as “One with Enigma”, have past careers that saw them building show cars for the likes of Mercedes Benz so there’s been no shortage of customer projects at their shop. Amongst the classic four-wheeled projects, an occasional motorcycle makes its way into the mix, just like this ’78 CB750k.




Honda CB750K cafe racer

“We have been so consumed with customer work that we haven’t been able to build a shop bike since we open our doors to the public a year and a half ago,” says Trever. “This bike started as a 40% complete build. The owner wanted to change up the oil tank, make a proper seat and get the carbs put back together. Once the metal work was done and the frame painted things quickly escalated, and it soon turned into a full nut and bolt build.”

Honda CB750K cafe racer

The donor for the project was picked up in the backwoods of Alabama after sealing the deal on eBay for $800. Unfortunately, it wasn’t much of a runner with cracked intake boots, dodgy old lines and a couple of handfuls of bees encrusting the petcock. The bike had also already seen some custom work that was all pretty rough. So once it was decided that the bike should undergo a full rebuild Trever worked with the owner on a concept.

Honda CB750K cafe racer

“From the beginning, the bike was meant to be a fun, reliable daily rider. Marty (the owner) is a real estate agent, so he needed something to dart around town on and check out potential listings.” Trevor recalls. “He wanted the bike to look custom yet subtle at the same time. This fit our building style perfectly. There are provisions for riding two up with comfort and the rear shocks are adjustable to accommodate the added weight. As much as we like to make beautiful bikes, we have a heavy emphasis on building usable and comfortable bikes that you can put miles on with ease.”

Honda CB750K cafe racer

To clean up the rear end the bike had a Cognito Moto rear hoop and oil tank tig welded on. Scale the shaped the seat, using DZUS  fasteners from a Ducati 999R to hold it in place. The special fasteners allow quick access to the battery within seconds and doesn’t require the use of any tools. The frame was de-tabbed and smoothed right down to the swingers for a super clean finish. A Balistic battery was mounted in a custom box beneath the seat and secured using the same leather that covers the new seat. The wiring harness is a one-off and Moto Gadget supplied the bar end turn signals and grips. Most of the other aftermarket parts Marty wanted were sourced through Dime City Cycles including the velocity stacks. “We smoothed out the fins on the header clamps and had them chromed by Speed Sport Chrome,” says Trever. “Every piece including the motor mounts and the ends of the swing arm had their rough casting marks ground down and smoothed out before it was all covered in PPG paint.”

Honda CB750K cafe racer

“Marty took it upon himself to have a custom gas cap cast by CraftyB with ‘SCALES’ cast into it. We ended up cutting out the original gas door and making a fill piece which was tig brazed in with bronze. The indents for the logos on the side of the tank were filled with bronze as well. We raised the rear mounting point of the tank 1 inch which gave it a more aggressive stance on the frame and allowed us to tuck the seat under the tank instead of butting the seat up against it like many do. I mixed the grey color by hand and ended up with what we call a ‘Cosmic Grey’. The oil and gas tank received a lot of block sanding time to get the mirror like finish. All the line work was done by hand.”

Honda CB750K cafe racer

“We also fabricated the mounts for the tach and choke which kept them flush with the Cognito Moto upper triple clamp. The exhaust is a MAC 4-into-1 with the slip-on joint removed and muffler rotated to kick up. We then ceramic coated the whole unit to keep temps down in Houston’s heat.

The trickiest part of the build was fitting all the electronics under the tank and making the wiring look clean. No rat’s nest to be found here when you peek under the tank. The bike starts first kick every time and has a healthy pull. Confidence in her reliability has been restored!”

Read more like this

Return of the Cafe Racers - Forgotten Twin – Crooked Motorcycles CB450

Forgotten Twin – Crooked Motorcycles CB450

Their name may conjure up images of a suspect automotive salesman, but rest assured Crooked Motorcycles is anything but dodgy. Run by two German mates who share a passion for building bikes…

Continue Reading
Return of the Cafe Racers - A Super Clean CB750 by Scales Studio

A Super Clean CB750 by Scales Studio

Scales Studio is 2 man workshop that specialises in fabrication work and high-end paint. Based in Houston, Texas their list of recent projects include an award-winning 1970 Porsche 911 Targa in pastel…

Continue Reading
Return of the Cafe Racers - TÜV Approved – HB Customs Honda CB900F

TÜV Approved – HB Customs Honda CB900F

Everyone needs a hobby. German-born Holger Breuer found his back in 2004 when he built his first custom motorcycle. Since that project, Holger was built an impressive 30+ custom bikes. What’s equally…

Continue Reading