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Discussion Starter #1


Hey, Guys and Gals.
Well, since I've got my rolling chassis and fiberglass at Lossa Engineering in Lakewood, Ca for some fit up mods, I thought I take an hour or so to start my official build thread.

History: My neighbor had seen my complete builds of an 86 Honda VFC 700 Magna and an 86 VF 700 Interceptor. He comes out to the shop one day and says he knows a guy who might be willing to part with his beloved 67 Bultaco M26 Matador. Hmmm. - " always wanted a Bultaco" says I, "how much filthy lucre do ya think he'd take for it" " I don't know but he says it's in great shape"

Couple weeks later I finally go to this guys house and this is what I see. I don't get the pipe or the lights in the deal and "it is my Dads beloved cycle and I really don't want to part with it" ( Uh-oh, I've heard this before) " I thought I heard it was in great shape?" -

"well, you don't have to do too much to it, the motor has been rebuilt so it's fine" (Sure it is, pally - we'll see)

I make my offer and he says "Well, I was hoping for a little more because on E-Bay these Bultaco's are classic bikes and go for a lot more" - Yeah, this guys got all the cliche's down, thats for damn sure, right?[8] "Alright homes, save the bulshit because my ears are gonna fall off in a second here" I'll take it off your hands, help me load it up in my truck" I fork over the hard earned payola for this rusted out piece of crap and drive home. This was 17 months ago.

For 3 months the bike sits in my garage over by the rest of the garbage while I ponder over yonder at my Yamaha MX 125 build for vintage cross. I have fun in local club races and AHRMA regional stuff here in Southern California. One day I'm watching AMA Superbike from Laguna Seca and the thought hits me like a ton of bricks - I will turn that Bultaco into a Road Racer!!!! WTF? Let me get this straight - You're going to take a trail bike and run vintage rr with the Honda's, Yamaha's and Metralla's?

And away we go! -
I go out to the garage on Saturday and with a heavy heart and a handful of metric wrenches, we " get after it"

The motor is pulled and sent over to Scott Clough Racing Engines for the full race treatment - spare no expense, right. whatever it takes.
on
I get full race V2420 shoes mounted on a Honda 350 front and I go ahead and keep the Spanish OEM rear. I polish my guts out on the hubs and Betors. Brand new spankin Excel high shoulders laced up from ( helluva nice guy, btw) Michael "Mercury" Morse at Vintage Brake - Vintage Brake did the brakes too, arced, the whole nine.
Dunlop K85 and KR 125 from RC Barker Engineering. Four Star service from RC Barker!!! Highly recommended!

While I'm waiting for this to be done, I go ahead and send out the frame for bead blasting. Bring on the paint. Vintage Koni shocks from FleaBay
and . . .

tapered head stem bearings from Sammy Miller in Jolly Olde England (Ka freeking Ching!)


All new wheel bearings from Johnson and Wood in L.A and a new 520 44T rear sprocket from PMP Custom Sprockets ( just send them your old one and tell em what you want, what could be easier for vintage racers?!?)


Here's the Honda CB dual leading shoe set up ( this turned out to be a pita, let me know if you need help, I consider myself somewhat of an expert in knowing what NOT to do. Good to go now though!





I pick up the A and B motors next weekend and the roller from Jay at Lossa (sporttrucks on caferacer.net) I will return with more pics.

Special thanks to CafeRacer.net for all the inspiration!- you guys and gals RULE.
Scott Clough Racing Engines, Yucca Valley, CA
RC Barker Engineering, Fla.
Vintage Brake, Ca.
SammyMillerUK.com
AHRMA
Circle F Pipes, Tejas!
Lynn Mobley Bultaco, Nv.
Hugh's Bultaco and Tim Weaver, New York.
Air Tech Streamlining, Vista, Ca.

I'll be back.
 

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Trepanned,
Nice build. It must feel good to be able to throw a little money at it to get it done right the first time. I can't usually do that on race bikes myself, but every once in a while a little indulgence is in order. Post some more picks when you get it running. Maybe we will see yu at Mid-Ohio next year.

Ken
 

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Discussion Starter #3
While I had some time to screw around, I have always been interested in composites. I got some Basalt fiber which is the Soviet version of Carbon fiber. I guess the Russians wanted to use basalt because of the lower cost for high tech stuff during the Cold War. Anyway, there seems to be more of it on the market and cheaper than carbon so I ought a few yards and thought I do a little experimenting.



This is the fresh pour of the oil catch pan that I sculpted the mold out of from a plain old block of styrofoam. I first made a cardboard single plane template and just used a surform to give the countours I wanted. When I was happy with it, I carefully applied clear shipping tape to the inside of the mold. All I had was polyester resin and polyester resin goes thru typical garden variety styrofoam like shit thru a goose. It has to be sealed. I used to layers of basalt fiber but I really only needed one. Reinforced the corners and voila!



A lot of sanding and bondo later and I have a giant ashtray because I never accounted for the FACT that THE OIL CATCH PAN FOR THIS BUILD NEEDS TO GO UNDER THE PIPE!!! It needs to look more like a big "V" shape. Oh well, It's good practice and I still have plenty of fabric but don't buy cheap resin from Home Depot (polyester resin) because it is, well . , . . cheap. Epoxy resin is much better - the kind you get from surfboard supply warehouse's.
 

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Discussion Starter #4
Thanks, Kenessex. Love to go to Mid-Ohio next year. I'm thinking I'll have this bike running before the end of September easily. I thought I could make Bonneville on 5-6 September because I would really like to take The Spaniard out on the salt - and the GP on the same weekend. Not going to happen. Sandia is a possibility though, that is six weeks from now.
 

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Neat bike even stock and looking good.

Are you going to shorten the forks?

Sprocket Specialists would be the only answer to your question about easier. I simply pick up the phone and they mail me what I request no matter if it's custom or off the shelf. I don't recall ever having them request a sample sprocket being mailed to them first.


What was it you found painful about setting up that front wheel? The last time I set one up was on a set of 650 Kawa Lower legs and it was easy and crapping in the well and not nearly as dangerous. Have put two on girders and one on a springer. Didn't find any of those adaptations tricky.

Also, why did you have to spend large for timken bearings in the steering head? Stem or cup bores have some bizarre non-standard dimensions?

The stem doesn't really look large compared to the max possible cup bore size.... the K factor of the bearing does look very steep.... but I'd guess off the shelf bearings would do the deed. No?
 

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Discussion Starter #6
Hackasaw,
I guess the bearing races have a much smaller W dim. They fit up into shoulders - upper and lower stem. I could not find correct dimension bearings from any US distributor. Anyway it was about 90.00 US for the set.

About the CB brake, sorry, sarcasm doesn't come across too well on the net. The cams were installed backwards from the rebuilder. I had never worked on this version before and didn't think to stop and figure out why the pivot arms will not go on unless the 'flat spot" on the cams are pointing down.
 
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