Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles
Issue link: https://magazine.cyclenews.com/i/125976
.-. . III ' ~ ... r;. co ,...( Fig. 1. The tiny arrows show where you'll need to fill and grind to make th is mod. work. Use care with this, make sur.&. the mag will dear, and the rest comes easy• . , Fig. 2. Use the height gauge to pick up the Position of the left bearing land, then scribe that same height in the die, marked transfer pOrt area. This gives you a target for the hole you're going' , to have to drill. small bolt. or weld the h ole shut so that th ere won't be an air , leak in to , the engine. Beside the left crank b~imng there is of Dykem. Now move your height gauge a spacer and a oil slinger. Since we arc to the outside of the case an d scri be a lubing the bearing with pre-mix cut this line across the transfer case' op ening .' shield down and make a shi m out of it fro m one side to the other side (F ig. 2). so that the bearing an d sp acer are in the same place that they were before you. With the line scribed on the case , set started. end' mill on a face the case up in plate. Bolt the case so that ' it is 90 At the rear of the en gin e where the , degrees with the m ill table. Pick u p the oil pump was bo lted on , take a new' center of your scribed line and drill a , gasket and use it for a template. Take one-eighth inch hole down into the this gasket and scribe around it on a bearing set. . piece of aluminum. making a cover to .rep lace the pump. , After you have 'th e hole drilled into the bearing scat. remove the case from While you have the cases apart, now the face plate. bolt the case flat to the is the best time to push the crank apart , mill table and cut a notch into the hole and check the big endbearing, replace if With a flat end mill. {Duplicate the ' it looks burnt or has excessive clearance. cutout just like the one that is in the Re-assemble your engine and install it case from the oil injection hole. back into your bike. Now don't forget. - old oil- injection hole Where the the oil has to be mixed in the gas and if comes out of the case and the oil line you forget you will be in worse shape than you were with the oiler. _ used to bolt to it. plug this hole with a an The Malcolm Rathmell original Malcolm Rathmell on Montesa, working out ncar home. Look for Montesa to get their trialer on the works-replica bandwagon this year or next. as Rastus will spend the season developing a 348cc six-speed. to be marketed as (you guessed it) the Malcolm Rathmell Replica. ' [XI (!JJOO~ 11,and ~ 11¥J ~ j\ ec at #\~ 11OO{9) [P)@ [M) ~ ~#\ WO~~ O~~ ~@[M)130~#\ 110@[M IMPAC WINS AGAIN ... Not Motocross! Not Enduro orIrialsl (asusual) BUT... th is ti rile WE teamed with Da rry I Hurst and his Yamaha Sho rtTracker at the Yamaha Gold Cup in the Houston Astrodome Darryl Hurst chose IMPAC lever assemblies for his Short Tracker be~ause of their dependability . when the stakes are high. don't gamble with inferior equipment. You too can rely on' IMPAC dependability. Our nylon control levers and gearshift levers are built to take the punishment of,grueling competition. Guaranteed? You Bet! For Life! IMPAC... The Choice of Champions Remember.. : if you fall and break alever, it wasn't ours . For more information , Contact your nearest dealer: , . . ' Attention Dealers: See us al booth no. 1401 in Cincinani IMPAC Industries 5704 Bella ire Blvd . Houston Ix 77036.l713 } 66B 9017 and booth no. 123 at Daytona MOM Trade shows . ' 17