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/125852
i~~ Da ...;I 1: g chain lub e int o the approp riate ho le, and h it the bu tton. Yo ur cab le is insta nt ly lubrica ted. The most amazing th ing of all is the fact t hat th is litt le bea uty ac tually works, and works well. It is reasonabl y p riced , d oes wh at used to be a slo p py job with no mess or slo p, and sho u ld last forever . You ca n get it fro m Yamaha dealers. We've already bought ours - it work s. '<:T' r-O"l ..... What, no br ack ets ? Yes ! It' s a Presto n Petty (no snickering, you liber als) "M ud er" IB ( Integral Brac ke t ) fen de r. Com es in a bu nch of co lors (America n blu e, co m mie red , willow wh ite, etc.) from Prest on Petty Prod uc ts, lnc . , Dep art ment We' re-just-kidding, 403 N. Main si.. New be rg, Orego n 97 132 . O r yo.u can wake them u p night s at 503/538·4104 or 503 /22 8-0436. Product evaluation Malcolm' s Orig inal Mink Oil? Is th at like snake o il? No ! It' s specia l wat e rproof for leathe rs and boots. Ma lcolm Sm ith, win ner of f ive ISDT go ld medals, sells it, a nd he says it works. Guess he ou ght to know if an anti -water compound wo r ks. Get it fro m Malco lm Sm ith Rac ing Products , Depa rtm en t F amous Movie St ar, Bo x 1086 , Riverside, CA 92502-;- Mu rphy Muffler By I. Kelso Smith, III T he Murph y Muffl er is des igned for use o n anv tw o stro ke mo tor cycl e. It is with out a dou b t the most unusually designed si le n~·er wc 've eve r seen. \-\'e like it be cause it is rela tivel y ligh t, it is maintenance free, and it is un ique. N a t on ly th at , it wo rks. T he muffler mellow s an d red uces the ex haust no te of any bi ke it is installed on. It in clu des a built -in U.S. Forest Service approve d spa rk arrestor , an d mu ffles wi th a silicon rubber sleeve which the sound waves have to go around to reach yo ur cars. The ma terial itself absorbs sound, too. It ne ver needs any repacking. Dyn o tes ting using the Murp hy Muffler as an add-on silencer/spa rk arresto r on a tun ed ehamber showed two th ings: T he Mur phy Muffl er did n ot cause a po wer loss grea ter tha n those caused by " fac tory equip men t" ad d on muffl ers installed o n tuned pipes below 7,000 R PI\I, ye t was quie ter. Above 7,000 R PM on the smal l-bor e test bi ke, there was a 10% pow er loss re lative to the per form an ce of the same pipe with a bolt on mu ffl er sold as fac tory eq uipme n t o n several rnoto cro ssers. How ever , tests show that whe n used with a pipe spe cif ica lly des igned and tu ne d for use wit h a :\Iur ph y Muffler, th er e is n o significant power loss at any RPM. In fac t, the re is a mid -range gain. The gain in quietn ess ove r othe r silencer/sp ark arres to rs mak es the conversion well worth while. If you can ride quietly in an are a, you can pr obably ride longer. A rider co uld ad d a very hot (an d lou d ) tuned exhaust syst em to his bik e, add a Murphy Muffler, and be st reet lega l, While the Murp hy l\luffler will poss ibly ta ke a bit of the edge off the p ipe (unless th e pip e was designed for use wi th -t he Mu rph y Mu ffl er }, that po wer drop will be less than th e increase a ttain ed over stock - yo u sti ll gain in the end. On e th in g we fou nd was that the larger th e b ike, th e be tte r the Murphy Mu ffler set-up wo rke d , It seemed to us to be an advan tage to rep la ce the sto ck gigan ror silenc er/spark arres to rs found on so me large bore Japa nese and Swed ish b ikes wit h th e Murp hy because it was sma ller , ligh ter , and less pr one to wearin g out. (However, it sti ll cos t more.) Wow, t his press release we just got in says th is is a shot of a new two st roke synt hetic oil for rac ing, bu t it sure doesn 't look like oil to me. It looks like a girl to me. Does it look like o il to you ? Doesn't even look greasy to me. Boy , sure would like to meet her. . .Hey , baby, if you read th is, wh at are you do ing ne xt weekend ? Want to learn to ride enduros, maybe get you r picture in the paper and become famou s? Call Crash here at Cyc le News. He' ll d o ya right , honey. (If yo u're int erest ed in the two dollar can of o il, try Klotz SFP, Box 1343 , Ft. Wayne, Ind iana 46801 . A decrease in noise level , perfor man ce co mpa rable to o ther si lencer se t-u ps (with a pro perly tuned pip e), n o main tenan ce, an d lon g life are fea tures in favor o f inst alling a Murp hy Muffl er. T he o ne draw back is th at it retails for $32.95 . If yo u're well heeled , love silence, and want to im pro ve yo ur pu blic relat io ns, you migh t want to dr op Murphy a lin e. Murphy Muffl er s, 53 12 E. ' Beverly , L.A., CA 90022. Got weak hand s? Th is is a Hand Helper. It see ms to wo rk, but ou rs threw two bands in ten m inutes after we started using it . They are easier to replace tha n when your '56 Chev y throws a rod , however. CMS Prp d u c t s. Inc. , Depart ment Stronghand Sam, 2134 Old Middlefield Way ., Mt. View, CA 94043 . Skyw ay wants to sell you hearing insurance in the form of Skyway silencers. They carry a one ye ar written guar a ntee a ga inst de fects a n d w or kma ns h ip , c o m e a s or iginal equ ipmen t o n Bu ltacos, Husq varna and Yama ha motocrossers, and ar e available at all sorts of de alers. Th ey ca n get t hem from Sk yway, Dept . Buffalo, 12300 Glad st on e Ave., Sa n Ferna ndo, CA 9 1342 ,2 13/365-3172. Yam aha MX boots By Irving K. Smith These boo ts are fairly du rab le but do n ot p ro tect eno ugh in the ins tep /ankle areas of the fo ot. T hey arc very co m fo rta ble bu t are no t to o s tro ng . Th e y d o not have steel kick plates like m ost boo ts. Th e bu ckles are accep tab le, b ut not especially trick. Lik e thei r l\IX ser ies bi kes, the se Yamaha boo ts loo k nea t but are for the _. "no n-serio us" ride r. A co mpet ition-minded serious rac er will w ant st ro nge r boots offering mo re protect ion. 30 What t his nicely retouched photo (to emphasize the "Yamaha" ) illustrates is a genu ine Yam aha cable ju icer. You clamp it on to t he end of a contro l cable, insert the spray tube of a can of spray Th e casu al t rail ride r will like the m be cau se they aren ' t real stiff, offer flood feel. and arc easy to shift w ith. You ca n buy a se mi -p ro tec tive bo o t th at isn 't s t~t . We cannot recom mend th ese for roa d raci ng, but they wo rk swe ll for touring, and beat Engineer Boots all to hell on the m o tocr oss co urse.