MOTOR-CYCLING.

Press, Volume LX, Issue 18194, 3 October 1924, Page 6

MOTOR-CYCLING.

BEACH RACING TO- j MORROW. I j The Pioneer Sports Club's bear.h j :n~ r-':5.-w opera to-morr<ys". when T H~ CC j ♦•vents -wilt bo ran inc3'*i:n~ n : rare in r i:o--Owing to i trl-'- •; Ir■ - - •irperienfx.d in pasr. the coropeu- | 5.0 rs arc being inirrueted to avoid car-;- j fijJJt* anr broach of the Now Brighton ] or" tSio North Boa<--h upon t!v J mor-or-'' ■'!-.-. r'?cft is within f h>: 'A ai- i train (,'iur.fT < .bunr:!. and r.o dsSk'ilrr | - ;A penen<"-ivd hr the H-:b >o ; far a* that lo'-'il body is con.oernrci. but j r,-, r ,-sfr-\i rpc ; i r'Oroi!™h ha;, to bo Th r - ! machine* w.ii have bo pusnod over I that «hort as in us within an j area in .-.-hi'-h motor-rvolo riding is j pr"iiibir.fiJ bv "'.i*- borough. To-morrowra»'trg ,-houid provide j rno rood sport. Tin bark markers m ( *.}«■■. » vrr.r have been set- " hat j ,w : ms .•» well-nii'h impossible ta;-k on I t!;e short and .if- a re-uit j no'v rider- norh": bo brought 'o light in | '.ho '.vinninr *....r0'"-. 1 ho fo»!Io'v;u r s a r-~ Four mile nviidrn : -ri!o i;ar.dn ap- 'J . j G, Ibimsav <6 b.p. Douria..-.!. r. V. j 13'. .Wirr.on i. 'J<J-.■'•<• • F?. J. t Fin re (:j > F)-"'io 1 3-o -JO.-er ; I>. v. Shaw .i h.v. "Hariej i. :•/>?<:• : W. fi. Weigel :7-0 Hsrlov;. . H. Bishop . 7/> Flsrievi, .30»" ,r ■ A. H . Mangm i : -'•' Tlar!«-v>. rs'i-e--. T. C. Whitlow r -i A .F.S.i. 12 mil-; open o'o 'r. Lambert Indian.-. :.or; I. C. ATonekman (7-9 j Ha.rle.vt. '„.~-o-- FI. W. Birdling i"-" 1 Hirley. -30<-ec: I.- F. Poors '->!• Triumph). In on 30 .w: A. Smith 1 • Indian.'. '2mm - r i?eo; T d Parniav (6 i ,p. Douglas;. 2mm 'iOseo. r>. -f. Batr '.'i-i Norton.', 2mm 30sec; K. .1 Hor c Douglas*, -3rr.in 30sec; F. C. Bile* Norton). 3rnm 30soc ; D. N. Shay' i li.p. Harleri. 3min oosoo ; \\Vi.2-l .7.9 HarlflT), -3mm ->>sei-; H. Hi iop (7-9 Haxlor). 3min -vsser ;T. C. Whitlow- A.-T.S.!. Imin 30:-e.-. 20 mile or«en, c .olo bandi^ar —d. Tygmbf.rl" (7-9 Indian i. scr: T<. *" • Monrkman (7-9 Harlevi_ 3."fier . If. 'A. ?7_ r i HarleV>; "/>;;<•: 1,. F. Poo--e JU Triiimohb 2mm 40-e-". A. Smith (t Tndianb 3min -iOyer; T. G. Ramsav (6 b.p. Donalas*. -tmin 20ser : J. Bart fn.* Norton), tmin 'JOsco: P- b Hore i ,3) Dorijrias). omir. -^.teeo; F. <\ Pilcy '.3\ Norton), "'mm "/tee.-. T> N. Shaw (■S b.p, HarleT). 6mtn £■ Weijrel 7-9 Harley). bmm Bisiiop (<-■) Harlcy). 6nun 30s<;c. AIR LEAKAGE. I Although the modern trriii motorrrcle engine ia .iusf- a? reliable as the <r one Innger." and almost a.3 easy to understand, tbr nnvioo may not know that its running efficiency is easily upj set by faulty carbnration. i Tt is surprising how the - singlecylinder engine will get along on a flooding carburettor and a leaky induction pipe, but the slightest air leak •will give trouble with a tturin. It tnake3 starting difficult, and the engine labourn to get up apeed on top gear. Indeed, on hills which have an eaay gradient up which the machine should roar on top gear it quickly decreases speed so that changing down is imperative. Another symptom of air leakage ia "spitting" out, of the carburettor gauze air intake. Sometimes with a two-stroke engine this will be preceded ,by a fierce explosion in the crankcase, and in some cases it is possible that a sheet of flame will spurt out of the intake. What makes it difficult for novices to detect the real canse of his troubles is the fact that the twin will run just as easily on low gear when there is» a leak, as it will when there is no leak. ' This is due to the fact that the engine "revs" quicker, and thus provides a. more powerful suctioft in a short space of time. Thi3 suction seems powerful enough to prevent a leaky induction pipe having much effect in such circumstances. But in high gear the engine take 3 longer to get into its stride,, and until it "revs" fairly fast the suction is not powerful enough. Against a head-wind on a bad road, or a long gradient, the fault will be easily noticed, but once the engine gets fully going on the level, or with a rear wind to help it, the fault i 3 not so obvious. These air leaks usually take place at the induction pipe unions at the cylinders, or the junction of the carburettor and pipe. If the fault* is discovered on the road a - temporary repair may be executed by binding up the joint with black insulating type. Usually it is caused by a worn washer, which should be replaced.

NOTES. B. Lc Comte, the winner of the Timaru-to-Christchurch road race, left last night en route for Melbourne, where he, together with D. Wright (fastest time) and C. Bell (second fastest) will represent' New Zealand in the Warrnambool race. Lc Comte's machine, through a mistake, has been wrongly described as to its make. He rode a Bell bike in the big race, and he is taking the same machine with him across the Tasman. The light-weight motor-cycle championship of New Zealand will be decided at Botorua on Labour Day. This should be one of the most interesting races of the year. Among the probable entries arc the Norton, this year'a T.T. winner, the A.J.S., holder of fastest T.T. lap, the Connaught, with the Blackburne engine, which established a world's record for the 350 c.c. class, at oyer 100 m.p.h., and the Douglas, which last year won the T.T., and was so prominent in Brooklands records. Besides these, it is rumoured that a new 500 c.c. Harley-Davidson may be present, and, if ridden by Coleman, it certainly .will be in the running. It is the first 500 miles in the life of a motor-cycle which means so much to its subsequent sweet running and service. Badly handled, raced on the stand, opened out while its bearings are still stiff, it soon becomes noisy and inefficient, and worst of all, the harm done can never be undone. Treat a motorcycle intelligently in the babyhood of its life and it will serve you well for the rest of its days. Modern machines are, of course, so reliably built with so large a factor of safety, that even the greatest mishandling is unlikely to cause actual breakdowns on the road—it is the ultimate performance of the machine that is affected. Stick to small throttle opening on your first trips and lubricate generously. The engine will probably require de-' carbonising after 500 miles, but this is a simple operation which takes but little time, and of course no money, whereas the alternative is a rained engine.