Customer Project | Honda CB Gas Tank Mod

Ok, so Sean came to me with a little project. He wanted to flatten the sides of his Honda tank, “the flatter the better”. I started out by making really rough cuts, just to get some material out of the way. Then I started to map out my final cut with 1/8″ fine line tape. This was working well, but in the back of my head I was remembering Sean saying “the flatter the better”. So, I noticed that the bottom seem of the tank was nice and flat. I was able to use that as my guide line to making a nice flat cut.

After I had my final opening I needed templates. The easiest way to make those is a set of dirty hands. I placed a piece of paper atop each opening. Then using my hands I rub the edge of the openings. This leaves a outline of the shape I need. When transferring the template I add a 1/8″ all the way around to make sure its oversized. I will latter trim it down to an exact fitment.

After I had the templates trimmed down it’s time to weld them on!! Sean also wanted a new gas cap and bung so I welded the one he provided in place. I was happy with the end result, at first I wasnt to sure about the flat sides. But seeing the finished product my opinion was changed. I ground down my welds, pressure tested for leaks. Oh yeah, Sean liked it too!!

I forgot to take photos of the finished tank so next time I see Sean hopefully Ill remember to take some.

For Sale | Custom Kz750

 

THE STATS:

DONER BIKE: I started out with a stock 1980 Kawasaki Kz750 LTD.

DRIVE TRIAN: The 750cc motor has been completely torn down cleaned and all tolerances check against factory specifications. New piston rings were installed. I lapped and  re-shimmed the valves, and installed new valve seals. All gaskets and seals have been replaced. The carburetors received a rebuild kit and new jetting. The exhaust is a four into one header, with a baffle and packing in place for noise reduction and back pressure.

ELECTRICAL: A new wiring harness, new blade style fuse block, and a Shorai lithium battery (saves space and worry) were installed. A new regulator/rectifier from Ricks Motorsport was also put in place. I installed a Dyna ignition, coils, and plug wires. The turn signals and taillight are LED. New 2.5″ LED backlit tack and speedometer were installed. Handlebar controls include, turn signals, HI/LO beam, horn, and flash to pass switch.

BRAKES/SUSPENSION: The forks, wheels, brakes, and swing-arm are from a stock ’78 kz650. I did this swap because I didn’t like the height of the Kz750’s front-end and the original swing-arm bushings were bad. I had the Kz650’s running gear from another build so I put it to use. In doing this the Kz750’s ride height really leveled out, and bushing problem was fixed. The forks have been rebuild and resealed. The brakes received new seals and new EBC pads. It has a new radial master cylinder in front and rebuilt master in the rear, and new braided steel brake lines all around. The rear swing-arm has been modified and reinforced to a mono-shock set up, using a CBR929 shock.

FRAME/BODY: The frame has been modified to accept the mono-shock conversion. The subframe is totally new and designed to suit the new suspension. In the subframe under tray (under the seat) is where you will find all the electronics including the battery. All Balls tapered steering bearings were used to update the neck bearings. The gas tank has been scalloped which is not only aesthetically pleasing but holds your knees quite well. The headlight bracket doubles as a gauge mount, and has turn signals built in. I made the seat pan to fit, and sent it over to Gotcha Covered Upholstery where they always do an amazing job!! In painting the Kz750 I went with a tri-tone of ivory white, Kawasaki green, and jet black. I use a base coat clear coat system.

The Kz750 is a absolute joy to ride, and gets more than its fair share of looks going down the road.

$7,500

kz750 | Shop Shots

Here are a couple of photo’s of the bike on the bench. I still need to get a new front master cylinder, repaint the swingarm, as well as touch up a few things here and there but here’s a glimpse.

Final Assembly | kz750

I am at the end stages here!! I’m sure a few bugs will show their ugly little heads, but I’ll just deal with that when it happens. Stoked on everything so far though!!!