Cycle News - Archive Issues - 1970's

TR IUMPH - BSA - R ICKMAN BARBOUR SU ITS - KET T BOOTS RANDY'S' CYCLES RT . 14 0 , 80YLSTO N, MASS. 0 1505 ~ w Z Rusqvarna W ...J Klocker's U >- U SA LES & SERV ICE Northwest Mot o rcy cle Cap ito l Kaw asa k i, No nan , AJS , Mako, Mon tesa , ez, Pen t on, Large st Part s Stock in Nor thwest. Co m ple te line o f MX a nd dirt rid in g acc esso ries, Full Bore and Hi Po in t boo ts , Femsa tron ics for CZ '5. 1 Da y mail or d er ser vice , custo m ma ch ine work. STROKIN'IT 3620 SE Pow e ll P.O . Bo x 06396 Portlan d , Oregon 97206 235-8938 Kit. T he kit s are no t here yet but the pist o ns are . You can get the m from yo u r lo cal Hodaka dealer. These pistons are a o ne Dykes ring p is ton with the - ring pin in the cen ter o f the ba ck o f th e piston. By usin g this piston yo u can • ma chine two b oost ports on an y angl e into the t op o f th e in ta ke p ort. Refer to Diagram ~ o . 3. T hese bo ost po rt s, as in Diagrams 2 and 3 , will have to be ma chined in by a Every Sunday ma chinist or can be d o ne by us . Cost fo r A ll classes ma chin in g the b o ost p o rt~ an d pi st on for you is 25 . X ow th is Dy kes p ist on h as a th ird (7 14 ) 586 -7964 port jus t un de r th e rin g (Mo re abo u t this th ird port piston Ia rer.) bu t I d on ' t see h ow this p or i can hu rt th e perf o rman ce of yo ur reed-valved engine. • • .. • * • • • * • * • * * * * * Y ou 've a ll seen re ed va lve p is t ons . JIM FISHBACK 'Sh at o ne time or an other. So me o f th em look like a p iece o f Sw iss che ese. When yo u drill a p ist on lik e th at, it's j ust a ma tte r o f time befor e it ' s go ing to break an d invi te y o u r e ng ine o u t to lun ch . Big holes, sq ua re h o les, lon g ho les, fa t ho les, more holes. T h ey may improve h o rsep ow e r but I havc~ 't bee;' ab le to prove it on th e d y n o. Wh at I d o kn ow is th a t if vou drill BMW : th e p isto n as pe r Diagr am N ~. 4 an d p oli sh the hole s to h el p prevent crac ks. 9008 Sierra • it will give yo u go od per for mance l'rJ~· • Font ana, Cali f. wi tho u t mu ch worry of pist on brea kage . • (7 14) 822 -2252 • .*** • • • • • • • **.***". T h is is th e way l .ran Je ff J effr ies' dese rt bik e for awhile . MOTOCROSS RAGES ESCAPE COUNTRY 6624 Atla nt ic . Bell , Ca . (2 13) 58 1-3983 J&J MOTORS (Continued from page 3) SOUND COlilTROL 2 & 4 STRO KE PIPES CO MPETIT ION S ILE NCE r. s FRAM E A N D PI PE REPAIR H E Ll A RC AN D MI L L ING stRDX[B}b~1~} .436 6 E. LaPalma Anah eim , Ca . 928 06 T el. (7 14 ) 993-2602 Send $3.00 fo r St t okt n' It T-shi r t • • • • : Yama a & • Triumph • : of. Fontana • • • • • Sales Parts Sen;ce • • • • ~KW, @~ O DK A , ~ve'IiQugfil! HEAD MODS ATTENTION E -, IF YOU'RE NOT SELLING CYCLE NEWS • First with Pro fit You make 20t o n every copy sol d . Plus you hav e full return privileges . The profit maker that cost yo u noth ing. Mini mum o rder is ten cop ies and we pa y shi p pi ng (via 2nd Class mai l). Your cust o mers will come back fo r ever y issue of CYCLE NEWS . Each and every issue is filled with News o f happenings in the two- wheeled sp ort. Mo to rc ycles fr o m min i t o monst er . coverage of co m pe ti tion eve nts , a ll t he A,\lA Natio nal Champio nsh ips, local spo rtsmen events . loca l fun runs, tests o f fact , new products , legislatio n , wa nt ads, a nd a voic e for readers. T his is CYCLE NEWS. I I I I I I I L Ok ay, what can I l ose. Start my store selling CYCLE NEWS with the next i ssue. I understand you wi ll bill me monthly and I have full return privi leges on unsold papers, by .returni ng the price tag wi m my check for the balance. (This offer good for authorized --I o CYCL E NEWS EAST O CY CL E N EWS DI XIE O CYCL E NEWS WEST O CYCL E NEWS CENT RA L (Check o ne , two, three o r all fo ur) I wi sh to receive copies of: motorcycle sto res o nly) 10 15 20 25 30 35 40 50 OQDDDDDO Send CYCLE NEWS to : Name of store _ Address _ City State Z ip National and Regional Authorized by Coverage (2 13) 427 -7433 or 636-8844 _ I I I I I· I I ------------------Mail to: CYCLE NEWS WEST, Box 498, Long Beach, Ca. 90801 • With ou t ge tting co m p licated wi th a bun ch o f co m p ression ratio figures, j us t mill .04 0 thousan d ths o ff th e head fo r Stage I po rt ing. an d .0 6 0 fo r th e " Ex per t " po rt ing. If co mp res sion ratio is ro o high , engines ove rhea t and sei ze. Now, as men tioned before, the Co m ba t Dy kes p is ton has a cas t-in th ird po rt. All an y body can do is guess how the Co m bat cy linder lo o ks. I kn ow th at it is an allo y cylinder so it wiII run coo ler , with a cast-in p o rt in the back of the cy lin de r th at will p robab ly lo ok lik e Diagram '"'o. 5 . Two third ports , as in Diagram ,",0. 6, is what I use with the Wombat Dy kes piston. They can be gro un d into yo ur st o ck c y l i n d er. Th e increas e in horsep owe r would be so mewh ere aro und 15 %. I use a thi rd p ort lik e this . with out th e reed valve , fo r my better riders and Ex pe rts. You can bet that the Co mbat Kit cy lin der, when it co mes o u t, will be very fas t. A little p ip ey ma ybe, but a go od hi gh h o rsep ow er bo lt -o n kit. "E.C." pipes for yo ur Wombat can be had fr o m your lo cal Hodaka deal er . T hese p ip es. h igh or low, have be en dyn o-tun ed and race tr ack-proven fo r the 125 cc Wo mbat. T he alloy to p ends tha t yo u see on th e tes t bikes are bi gger th an the Com b a t Kit will be . We designed th em that wa y b ecause w e wa n ted coo ling so th a t in lo ng races horsep ower would be m a intain e d wit hout loss due to he at. One m o re s tep tha t was take n is th at both engines h ave been treated wi th Kal-Gard. Kal-Gard is a new process fo r the motorcycle rid er w ho wants that extra lillie edge. It 's a coatin g which is a co o ked-in ch emical that lowe rs engine temperature by 20% and de creases friction by 10%. Ex tensive d yno tests have been run to back up these figu res. (Mo re details can be had by con t actin g Kal-Gard, 7 1 I 8 Ger ald Ave n ue. Van Nu ys , Cali forni a 9 14 06. Ph one : (2 13) 99 7-16 73.) J eff Jeffries" de sert bike has a 14 0cc engi ne. (You wasn ' t read y for that. was yo u ?) In th e desert. this b ike can h o ld its o wn agains t th e best o f th e 250cc bikes. T o n y Rogers" b ike h as a 125 mill. Bo th bi kes use Bin g carbs: 30m m in size . Eac h alloy top end is bu ilt fo r the rider wh o wa n ts a special eng ine . Whether it's a 14 ()cc engi ne for desert racin g an d end ures, or for the rider wh o wants to beat his buddies' 25 0's an d 400's o u t there on th e trail riding party. The st ock trans, which was left in Val 's Steen 's 10 0, h as a wid e rati o gearbox wh ich was built wi th th e en d u ro rider' s n ee d s in mind Fi fth ge ar is an overdrive, allo wing a high cruising sp eed o n the roads. In J eff' s deser t bik e, I used a Super R a t trans mission. T ony's motocross bi ke has th e old 9 0c c close ra tio gearbox. With third, fo urth and fif th gear very close t o each o th er, it makes gearing on tigh t tr acks easier to set up and on an engin e tha t's a (Continued on page 4 7)

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