Bikernet Bonneville Effort, Part 14, Chop N Grind Hides Out


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Choplead

Since the visit to the Biker Net Headquarters a lot has transpired. First off thanks to the 5-Ball Racing Team we were able to score some parts from some of our sponsors. Jims USA and BDL Belt Drives. Also a few extra parts unknown to the 5-Ball team. What the hell. they were just lying around. I thought everything was up for grabs. There were parts everywhere; we just helped ourselves to all the good stuff.

BDl
Thanks to Bandit and BDL, we’re running one of their performance systems. We need to build a primary cover for it.

Well all hell has broken out since then. 5-Ball Minutemen were spotted all over the desert looking for us. We are now forced to go underground. Our original shop has been shut down due to all the heat from our so called brother team. Shit, I just took a few parts, no big deal. So we found a secret bunker in the middle of nowhere. It’s a big desert, so I suggest our 5-Ball competitors watch your step. People tend to get lost out here, fast.

Chphead
Secret Chop N Grind headquarters in 99 Palms, California.

The good news: Dave Mackie finished the heads. Jim Leinweber is going to deliver the cams. One set of Avon Tires are being buffed and shaved at Nicks Tires Service in Long Beach (5-Ball Territory). Ross Forged Pistons are ready to go. A small amount of welding is yet to come on the rear controls.

Chopteam
Chop N Grind team, Bob T. (left), and Larry P. Somber lookin' bastard, ain't they.

We are on our way. I would like to say thanks to all our sponsors and all those who have contributed to our cause. I have received a lot of e-mails from other riders and race buffs across the country, looking forward to meeting you all on the salt.

road test
Chop N Grind testing strip.

Saw the “World’s Fastest Indian” the other night. Now, I can’t wait to get on the Salt again. Remember if you can throw a few bucks our way, it sure will help. We’re getting down to the wire. Larry P still needs Race Leathers, pop-ups for the shade on the Salt, and other miscellaneous items. But this won’t keep us down. We are going come “Hell or High water”.

Chppiston
I don’t like the look of their pistons, but I’m not tellin’. –Bandit

We’re proud to report Bill Hayes of the Booze Fighters wrote an article on the 5-Ball team for The HORSE Magazine, look for it in July /August issue.

Cams

http://www.leinewebercams.com/Links.htm

Welding

–Bob T

Chicks
Just a taste of Bikernet motivation.

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Bikernet Bonneville Effort, Part 12, The 45 Brakes

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FlatOut

I’m running back and forth between bikes fabricating shit, waiting for parts, dodging bullets and counting the days. Yesterday I received a note from David Zelma at Performance Machine. “We found the front caliper bracket,” he said and I sighed. I was beginning to wonder whether I dove into an odyssey to find the un-findable part.

I can vision that 10-inch front brake rotor bracket. I could swear I owned one at one time. Here’s the number, PN 1208-0017. It was designed for their standard 4- piston calipers to mount on XL-FX 1978 through 1983 with 10-inch disc brake rotors. The 10-inch number is the critical bastard. I have a handful of the ’84 and up jobs for larger rotors. If you have one of the 10-inch brackets, frame it and mount it on a wall.

rotor blank undrilled

So we shifted to the rear bracket. We had the coolest PM 8-inch floating rotor without holes in the aluminum center. Jay took it home and carefully measured the center of the lip, figured out five even positions and drilled them.

rear wheel on tube stand

The PM based rear wheel hub needed to be drilled, for the rotor and that was going to be a trick. We didn’t have a drill press base large enough to reach the hub but we did have a large chunk of 6-inch steel tubing and center punches to mark the holes.

k drilling rotor holes

We marked, punched and drilled the holes with guide holes first. We taped the drill bit to give us the proper depth without drilling through the hub. Then we drilled the holes the proper diameter to tap them with 5/16 coarse threads.

hub drilled for rotor

With the rotor drilled and fitted, we dug around for a bunch of domed Allens to fasten the rotor to the hub.

With every move there’s a consideration.

The bolt heads needed to be shallow enough to miss the caliper bracket and stainless domed heads did the job. The other consideration is strength. According to Derek from DMP Enterprises, our fastener connection, (818) 775-9804, we should not use stainless fasteners on rotors. “You need grade 8 fasteners,” Derek said.

rotor in place

Okay, but this is a much lighter, less powerful bike. Next move, a wheel spacer between the two Timken bearings in the hub and Jay brought over the seamless tubing necessary, and we did our damnest to make a measurement. Then he took the data to the lathe and cut the tubing square to make sure the bearings ran true to the races in the hub.

jay measure wheel spacer

After several precision cuts, Jay cut the bearing slightly short and we used a couple of shims to make it good with a clearance of .010-inch. Then I greased the bearings thoroughly and slathered grease on the races. With the spacer/shims in place we installed the bearings and seals. The wheel was ready to rock. We needed to grapple with the small rear PM two-piston caliper and mounting bracket.

45 drilling brake axle hole

This is a tricky Performance machine setup. It works with several sized rotors for axle spacing. It also allowed us to run the anchor bracket out either side of the caliper. It bolts into the middle of the caliper halves. First, we determined where to drill the ¾-inch axle hole by the PM gauge stamped into the caliper bracket. We drilled a guide hole then the major ¾-inch puppy.

45 anchor brkt on axle

Here’s the deal. The bracket fit right onto the axle, then we had to take the caliper apart and install the anchor-rod bracket. As you can see, in the top of the shot below, the bracket is sticking north. It can also be installed aiming south, or east and west, depending on how you’re holding the caliper. I musta split that caliper a half-dozen times during this process.

45 anchor brkt

caliper halves

It was a trip figuring out all these components and how they fit together. You get the results of all our puzzle work. Okay, so once we put all the pieces together properly and wrapped the caliper over the rotor, centering the pads with the proper wheel spacer, we installed the wheel.

45 rear brake brkt softail style

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FLAT OUT FLIPPED

Our first custom notion was to mount the caliper Softail style so the caliper rested between the frame rails. We actually manufactured a brake anchor bracket and machined it to fit perfectly. Then we discovered that the wheel was seriously off center and we’d misplaced the sprocket spacing. We had to regroup.

softail style anchor

We returned to the bike and dropped the axle caliper bracket straight down to allow the bracket to act as one of the wheel spacers and be pressed against the frame axle plate. There was a catch, a lump in the frame that didn’t allow the plate to set flat.

k j m team

Bikernet.com does not have a CNC machine, but a BJ&M (Bandit, Jay and Masa) machine. This is truly state-of- the-art machining. Jay controlled one cutting direction, I controlled the other and Masa sprayed the cutting fluid for perfect accuracy and efficiency.

masa spraying

Note the cutting fluid being precision fed into the Bikernet Machine Shop operation.

milling break anchor

We notched the bracket then discovered that our notch was on the wrong side. No worries, as the Aussie’s say, we flipped it and notched again.

cat in faring

During this operation a highly trained guard cat watched the shop door while positioned in the fairing we planned to modify for the 45 flathead, Sportster front end, since we my run this puppy in the partially streamlined class.

milling closeup

We’re missing some shots of the heim joint anchor rod we built and fastened to the frame through an Epson scanner glitch, but we’re working on it. We may retrieve them yet. In the meantime our frame is out to powder at Foremost in Gardenia.

But the shop isn’t on vacation. We’re cleaning the shop, rearranging equipment and refurbishing some new-to-us equipment in preparations to build these two bikes fast, once the powder is back.

belt sander

We captured two old Delta wood working machines and transformed them into metal shop hands. One is a belt sander and the other a band saw. We needed both. We cleaned and grease ‘em, then try to make ‘em work. My problem was finding the right blades for the band saw in the correct length.

John Reed, the V-Bike designer for Custom Chrome, came to my aid.

You can get a blade welder. You buy a bulk length of blade cut it to length, put it in the welder and it joins each end. Then you have to heat the weld red, and let it cool, to anneal it. Rutland tools sell lengths of Starett band saw blades in specific lengths.

blade machine far

Come to a crunch, you can get your saw blade the right length, grind each end so it chamfers to a razor edge about ¼-inch in on each end of the blade.Put some silver solder flux and warm it with a gentle negative acetyline/oxy flame until it melts, (just under red) and touch it with just enough silver solder to let itcapillary across the surface, hold each end together with some flux, heat it, and it will join, and grind the side so its the same thickness all over.

john reed blade illo

We tried the welder and it didn’t work so we decided the man with the torch could weld it, and I did, very carefully. Then ground it and we have a working bandsaw, I hope.

Next, I’ll bring you the exhaust pipe fab on the V-Bike 120-inch Panhead, followed by the assembly process on both bikes. We’re burnin’ daylight and Whiplash reminds me of the Sturgis deadline on a weekly basis.

blade machine close

golfer
Some Bikernet shop motivation.

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