Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles
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e HoIne 8. '" By Rod B"••", Q. o ,... '" ai Workshop ~ g Gl ~ w Z MOTO-BETA ENGINESTRIP, W ..J Moto-Beta seems to have been one of the most popular of the lightweight Italian imports and many were sold across the U.S. to riders interested mostly in a lightweight dirt bike. Like so many of the Italian machines, it sports an engine built by F.B. Minarelli, so this engine strip could be suitable for any number of machines. This is not meant to be a step-by-step disassembly, but more in the line of suggestions of things to watch for and hints to make the job a little easier. <.J >- <.J 4.) First remove the adjusting screw and lock nut and replace them with a large bolt that will thread into the plate in place of the adjuster. Using a spacer and a large washer with a small hole, the bolt can be drawn down until the springs are compressed enough to remove the spring cI ip. The springs can be set aside as a unit until ready for assembly. 12.1 The shifting and transmission assembly ready to be installed into the case. The knack of inserting them as a group is not too hard to acquire ~nd makes the job a lot easier than setting them in the case individually. 9.) When the bearings are to be replaced, the case should first be heated. If a blower unit as pictured is not available, the kitchen oven will work just as well, or even a propane torch. The bearings should never be removed or replaced without first heating up the cases. 13.) If for no other reason than to keep it neat, th is rubber "0" ring on the clutch operating shaft should be replaced as rt keeps oil from seeping out around the shaft. 1D.) Check the shifter forks and shifter cam for wear, both forks work off the same cam groove and any wear can cause problems. 1.) As the head gasket seal is with a lip on the cylinder, a small amount of grinding compound is placed on the barrel lip and the head rotated back and forth on it to lap in the two surfaces. After you have lapped them in, be positive you have washed away all traces of the grinding compound before re-assembling the engine. 5.) This is the complete clutch assembly, ·:heck the steel plates for glazing, if apparent. rough up with a piece of sandpaper using circular strokes. If the bonded plates are bad, they must be replaced. 14.) When re-assembling, if the engine is placed in a cardboard box or on a small wooden frame made from 2 x 4's, the shafts will protrude down inside and the case will be held securely wh ile it is assembled. After the engine has been assembled, look closely to be positive there has been nothing forgotten. 11.) Both sliding gears are on the same shaft and the area where the shifter forks ride as well as the engagement dogs should be closely inspected for wear. 2.) The electrics should be gone over before re-assembly and after assembly, the ignition should always be double checked. Riders report good results with the timing set anywhere from 2.8mm to 3.6mm BTDC. I have had good results on a slightly modified engine set at 3.Dmm BTDC. Shown here also is the flywheel puller that must be used when removing the flywheel, if you don't have one, purchase one. 3.) When removing this type of clutch unit with the spring-clip type of retainer, it is a lot easier to make up a tool from bits and pieces found around the shop than to try to compress it in a vice. ........... .. ;. Mik; Patrick's ~ t YWHA of COIOIA· •• '~, 6.1. This is what will confront you as the left-hand case is taken away. Always check for shims and thrust washers as they are very important, also check the left hand case for any that may have been held in to the case by oil film. 7.) A diagram like this for the case screws similar to this is a good methOd to not only keep from losing the screws, but upon re-assembly it will assist you in getting the right screws into the right holes. MAICO WINS OREGON 'INTER-AM Ake Jonsson and MAICO conquered the freezing rain and mud at the Northwest Classic to chalk up another win for MAICO in the great Inter-Am Series. The win puts Ake and his MAICO well into the lead for the overall Inter-Am Championship. Ake's 1971 production MAICO has proven its performance and reliability as the Series record sh ows: 1st. 2nd. 1st. 1st. 2nd. 1st. 3rd. 2nd OREGON PHOEN IX SACRAMENTO LOS ANGELES ATLANTA MID STATES PEPPERELL ELKHORN Nov. 22 NOY.15 NOY.8 Nov. 1 Oct. 25 Oct. 18 Oct. 11 Oct. 4 OREGON INTER-AM (Salem, Oregon) Noy. 22,1970 500cc INTERNATIONAL 1. AKE JONSSON - MAICO 2. Bengt Aberg - Husky 3. WILLIE BAUER - MAICO ~ 250cc JUNIOR 1. OWEN BELMONT - MAICO 1101 E. 6th St. - Corona - Cl14) 135-11n 0 •• HUSKY parts & SACHS accessories BMW Specialties 411 West Whittier Blvd. Montebello, Calif. 90640 (213) 724-9474 250cc EXPERT 1. BILL COOK - MAICO 2. KEITH NERSETH - MAICO 3. LARRY MASCOTTE - MAleO 8.) These are the important parts to make the engine run, they should be checked thoroughly. Before re-assembly, the barrel should be de-glazed and a new set of rings should be fitted. A close examination will show the top ring to be of the "Dykes" type which can only be installed one way and only in the top groove. We like to list the results in supporting classes in this great Inter·Am Series - to indicate that it's not a case of two great riders (Ake and Willie Bauer) standing alone in the MAleO bid for glory. ' . The American riders in the supporting classes have done a fine Job throughout the entrre Series (winning by far the most supporting events). Which should prove to you, as it does to us, that you too can Win on Maico. Get yours today and join the Winnersl West Eost Southeast COOPER MOTORS EAmllN MAICO _ICO SOUTHEAST AMOR SAUS LTD. 110 E. Santa Anila Ave. Burbank, Ca. 91502 Royal & Duke Sis. 6918 Tomiomi Trail Sarasota, Flo. 33581 31.(3 W. Broadway Reedsville. Po. 17084 Canodo Voncouver, 8.C.