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Messages - john.k

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i think these caps originally had a cork seal,which is softer and more resilient that rubber......the cork is fuelproof and easily conforms to the gap without force being needed.

Identify these bikes! / Re: Can any one identify these gearboxes?
« on: February 11, 2019, 06:24:27 AM »
The top lever ones are BSA rigid single around 48-54 350 and 500/600

British Bikes / Re: Auto advance
« on: January 29, 2019, 10:52:27 AM »
Its likely a new capacitor is needed...........the spark may not be as strong as you think.

British Bikes / Re: Is a Sunbeam S8 capable of cruising at 57mph?
« on: January 26, 2019, 12:02:23 AM »
To be passing any speed limited trucks in Aus,you ll be needing a Vincent Rapide.....speed limited to 104k,they cruise at 120k,and pass cars a dozen at a time.........there are plenty of the S8 Sunbeams for sale here ,for not much money,because they cant hack it on the hi way.

British Bikes / Re: Is a Sunbeam S8 capable of cruising at 57mph?
« on: January 24, 2019, 09:14:58 PM »
Hypoid and extreme pressure (EP) additives DESTROY  bronze gears in worm need some kind of high spec industrial worm gear lube............The old worm drive iubes contained around 20-30% castor oil.........Pre 1950 many big trucks had bronze worm drives,and worm oils were freely I remember is Dentax W which we used in the worm diffs of the Coles 30 ton cranes.

British Bikes / Re: 1955 Matchless G9
« on: January 09, 2019, 11:20:09 AM »
Nope,..Enfields were never popular because of the appalling gearbox........full of false neutrals.......I remember when we sold the very last TT Interceptor............the guy was back next day complaining about the gearbox.....But the boss didnt give a toss.........we were also selling the first Suzuki 4x4s......a "jeep" for $750 ,out the door.With a marvellous 750 twostroke 3.....Couldnt keep up with the demand.....the little things would go anywhere,just bounce across the sand that would bog a Rover.....You will never find one now ,though ....the thin metal rusted away while you looked .......We cleared out the last Velo Thruxton and Enfield TT ,so the space could be used for Suzuki cars......As I remember ,the last Thruxton was sold for $700 to clear it.,reduced from $1150......which is about what i took home every week on comissions from the cars......About 5 years later ,the Suzuki franchise was sold for millions.

British Bikes / Re: 1955 Matchless G9
« on: January 09, 2019, 02:49:55 AM »
The box is a Burman,yes.....but the B52/GB was only in production for a couple of years,as AMC had spent a lot on their own plant to make the AMC box.,fitted from 1957...........The Matchy twins were pretty bikes,but never wildly popular............probably because of the T bird and A 10...both 650s,for the same money.

British Bikes / Re: 1955 Matchless G9
« on: January 08, 2019, 02:11:02 AM »
The G9 should have been the perfect bike for the careful owner.......they had oil filters everywhere......unfortunately,put one in the hands of the average idiot who owned old bikes in the 60 and 70s,and they suffer.........the meehanite crank didnt resist dirt very well,or reduced oil supply caused by neglected and blocked its very common to find cranks ground 060 under ,and more.............IMHO,the other main problem was the forks didnt wear well ,and were easily bent......the stantions apparently a very soft steel.............other problems were cam and tappet wear,IMHO,caused by too strong valve springs........strong springs needed for the 7000 odd revs the horsepower was quoted at...................the B52/GB gear box was ok,but nowhere as good as a AMC box.,and the splined clutch adaptor is often loose on a worn mainshft spline....which means primary chain runout,...same problem as Nortons always had in that era.

British Bikes / Re: 66 Bonneville T120
« on: January 04, 2019, 01:40:00 AM »
Amal jets were sized in an Amal jet sizing machine,which measured flow of a calibration fluid.........consequently its very difficult to guesstimate jet size ,if wear or alteration exist...........i would assume that a properly calibrated jet would only be available from the current manufacturers.....all the aftermarket ones will have approximations of dimension.

British Bikes / Re: Pre-1920's Side-Car Canopy Pictures....
« on: January 03, 2019, 01:33:53 AM »
Fighters didnt have canopies in the early days.........the pilot had to be able to reach the guns to reload magazines and clear stoppages.

British Bikes / Re: Oil
« on: January 03, 2019, 01:27:48 AM »
I used the same idea on Indians.......when the clutch on an Indian sticks,you can drive with the pedal thrown out before the plates will free simply leave the clutch pedal in the fully released position,and the plates dont stick......Over time the springs may weaken slightly,but a lot better than replacing gears in the gearbox.

British Bikes / Re: Oil
« on: January 02, 2019, 12:34:29 AM »
You have to be careful of any kind of modern car "friction modified" will cause a bike wet clutch to slip............old fashioned oils are OK.......but IMHO,you are probably better off using an ATF..Dexron oil in the chaincase,so there can be no mistake..............the same applies to engine oils..........modern oils are formulated to be compliant with pollution regulations and especially to not poison things like particulate filters,and sensors.

Identify these bikes! / Re: Bmw boxer engine motorbike or what?
« on: December 15, 2018, 11:58:57 PM »
there are a lot more brands in Russia than may be something not exported......ive even seen pictures of a half baked Harley copy.....more of a larger Yamaha 250.

British Bikes / Re: Reworked old motorcycle frame .
« on: December 04, 2018, 08:47:44 AM »
Looks like one of the scrapyard specials from the wilds of eastern europe or the balkans pre glasnost.Its obviously seen fair use for a period ,probably until someone saw value in the motor and gearbox,and sold them on ebay.

British Bikes / Re: Nut Sizes
« on: December 04, 2018, 08:38:53 AM »
FN used a lot of existing gun fitting threads.....for instance the 1/4" x 22 thread is from the two triggerguard screws of the 1889 Mauser rifle that FN was set up to make.All the machines and tooling were supplied by Ludwig Loewe of Berlin,who were also variously part owners ,mortgagees in possession,and finally all the machinery was repo ed in 1914 to form a fifth production facility in Berlin at DWM......then all grabbed back again in 1919,with Loewes dispossessed permanently as they were jewish ,however DWM seized the plant again in 1939,and used the FN military bike as a model for the BMW sidecar wheel drive.

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