Cycle News - Archive Issues - 1960's

n ow that the chassis is just about finished you're probably chomping at the bit to get started on the engine. Before we plunge into the engine though, take a look at the photo showing the tank tie down strap. This was made from a section of an old inner tube. A straight edge and an Exacto knife or a razor blade is all that's needed. The loops on each end were made up from 3/32 brazing rod. Fold over the ends of the rubber strap and, using Super 3-M, bond the ends together. Just follow the instructions on the tube and you won't have any trouble. It's a good idea to clamp the ends in a vise overnight to be sure of getting a perfect bond. Braze on a hook just in back of the tank on the frame for the rear tie down loop. That's all there is to it. 11--_5_oc_c~RO~A~D~RA~C~ER_.P_A_RT_6_1 Story & Photos by Bob Braverman HOW TO BUILD A TEACUP RACER FOR UNDER you can carefully file $300. the cutaway) - the epoxy to fit the new shape of the carburetor bore. Jus t be sure the slide is clean and dry before apply, ing tbe epoxy. While the epoxy is setting up, remove 3/1S- (.187) from the backside of the piston. Also we're going to leave off the bottom piston ring. Study the drawing of the $21.00 and the carb is $24.00. For those of you who are not really enthused about engine work, all of the above mentioned parts are bolt on goodies. You can reach Don at 2S7~ S. Poplar Street, Brea, California or give him a call at (714) 529-5603. The Gasworks Bolt On Goodies Now let's get back to the engine. Remove the head, cylinder and piston. If the piston and cylinder are in good shape, you can modify these to get more performance. If these items are worn and need replacing, you might consider the kit being produced by Don Anslem. Don is selling heads, cylinders and pistons, expansions chambers and carburetors for the Mondial and Ital Jet machines. .A cylinder is $19.95, the head costs $12.00. An expansion chamber is However., if you do like to modify engines, there are a number of things you can do to improve the performance considerably. Let's start with the carburetor and intake tract. The stock carburetor can be safely bored to 20mm (.800) by any competent machine shop. Likewise the intake manifold. The porting itself can be done by a small grinder, the type usually found in hobby shops. In order to achieve the results we're after, you'll have to plan on doing some port work. Once the carburetor is bored, you'll find the slide will no longer drop all the way down. This is easily remedied. By building up a layer of epoxy on the back side of the slide, (the slide opposite RESULTS PROVE IT•• HODAKABILITY DOES IT EYERY TIME! Pacific SoDthwest CblmpioDsbip European SCrambles July 9, 1967 JACK FROELICK - HOD JACK MORGAN - HOD FRANK WHEELER - HOD DICK WRIGHT - HOD Istthru 13th were HOD sage Hoppers 5O-Mile July 2, 1967 1. JACK MORGAN - HOD 2. ROY BARNETT - HOD Ponderosa Hare & Hound July 4, 1967 J, SPENCER HOD S. HOLLADAY - HOD E. C. BIRT - HOD lstthna 7th were HOD Southern Calif. No. Calif. Distributor Area Representative • LEAVITT POWE C H.A. 'NELS' NELSON ~.~ 2~J;°~~r1s~'~rv~ Pbone (213) 243-1017 Rancho Cordova, Calif. . Phon. (916) 635-6970 Glendale, Calif. Deliped & I~ortetl By PABATCO medium size batteries because they're good all day long. For a coil and condenser there are many good onl$ to choose from. One that I can recommend is the late model Ford 12 volt coil (part no. 12029 B). You can also get a matching condenser. This coil and condenser combination really puts out a healthy spark at high rpm, with very little battery drain. Be sure to put the ignition switch in a handy place, just in case you have to get to it in a hurry. The top fork plate that the bars are welded to is a good spot. You can use the original coil mount on the frame. Wben you wire all the electrical components together try to be as heat as possible and fasten the wires to the frame. Don't leave them dangling. , U Ie the above dlalJam as a culd.lln. for the modifications ~ the Inla... and .llIIaust ports. parts. This is what you want to wind up with. Take your time and do a good job. If you hurry this phase of the work, you'll be sorry later on. It's far better to do the job right the first time than to have to do it again, (and it's a lot cheaper too). You can go more radical than what we show here, but you begin to lose reliability and the power range becomes very narrow. I I , ,. ! This Is th. d1acram of the exp.anslon chamber. All JOu have to do Is build It! Modifying the Ignition System Since we're going to use total loss ignition we can eliminate the magneto flywheel. All we need is the hub with the attached ignition cam to the crankshaft. This is all the modification needed for the ignition system. The choice of battery size is up to you, but don't make the mistake of getting a tiny one just to save a few ounces. The capacity of these small batteries is very limited, and they don't last very long before recharging is necessary. I prefer the You'll find that the engine will require a larger main jet, and possibly a colder plug. Treat the engine with care once you start riding it. Take plug readings often to be sure everything stays put. The re' s nothing like a holed piston to dampen enthusiasm. Next week we put 011 the finishing touches. See you then. ::e ll> ~ ~ ~ '" ..... ~ "'"; .... ~ ~ ~ ~ j ;>., U

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