BSA A10 dyno run, great noise
Posted on By chop
my bsa a10 super rocket on the dyno testing power and air fuel mixture. sounds great fantastic noise many thanks to Bob for video.
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BSA Motorcycles
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I have goosebumps
its a 1961 a10Â it has an alloy head i think thats a efect you get on low def cameras we have better full hd cameras now.
curently the a10 is having a major rebuild its been very expensive but it will be fantastic.
I am curious about the flashing on the cylinder head at the exhaust outlet. Got a 1956 .
For those knocking the old A10 design , just remember ,they owned the hill climbs in the USA for years and some are still doing it.
Looks like a Rocket Gold Star brake on the front,am I right.I had a 62 Super Rocket and the brake was different to yours.Mudguards were painted red not chrome on the 62 Super Rocket.
The RGS never did have twin carbs, in fact with an unmodified head that would be impossible as the inlet tract was siamesed and moulded to the head. I did see a twin carb head but it had a great deal of machine work to make it.
hi I own a plunger a10 and use it in the summer to play on the back roads and out in the country side cant beat the sound of a a10 shutting down. not the kind of bike to buy if you want fast performance but in top gear will pull up a mountain without missing a beat. classic motorcycle at its best
This is a weird bike. Older engine with newer forks & brakes.
Coś pięknego 🙂
That's a sweet looking bike!
@lightningrob i have a 1957 bsa A10 road rocket trials bike that was use din competition, what was the issue with yours?
my a10 for an old bike its ok it was running well back then but it had been mesed with some serious high comp pistons and for an old bike it had some poke. i got fed up with the reliabily of it tryed to blowit up one day it got me mad but i put it to the back of the shed till i find time to rebuild it and calm it down so its more reliable. though my a10 is a pain i will sort it coz all my other bsa's ive sorted take me 1000's of miles across europe and uk. many thanks for ur coment
my standard NSR 250 mc18 is 65bhp, about 60ish at back wheel….
the restriced mc16 that i also have is 45bph
Centimeter=US spelling, centimetre=uk spelling, theatre=uk spelling, theater=us spelling, litre=uk spelling, liter=us spelling..
the road rocket sounds nice better in real life obviously i restored a A10 and using a old motor cycle guide timed it with a packet of rizzla papers ! and it started first kick the biggest enemy of the bikes are the capacitor in the end on the mag bobin
replace it with a tv capacitor and it gets the mag running well !
If the gearbox and chain was losing 20hp then in 20 mins no more gearbox
Beautiful bike, beautiful noise! I have a GS 500, which is 1980's air-cooled technology, and it has 47 HP, which is almost 1 HP per 10cc, as it is 487cc, but it's a DOHC twin, not a SOHC single. A 500cc air-cooled single will net you less, about 40 HP, which is what my friend had with his 1978 Yamaha SR 500, which strains to do 90 MPH. These are stock numbers, and you can't hot-rod a single very much because it will vibrate like crazy and be a pain to ride.
true bikes better than jap plastic
k, thats about 1hp per (<)4cc (guestimate)
but thats an expensive 125cc bike that may or may not last really long, this is very uncommon for a motor to be that strung out, plus it probably gets that amount of power at 15K rpm. if you wanted you could probably build an engine that will get 1hp per cc, the possiblities are endless with the technology we have nowadays, im just talking from a realistic/common perspective (yes the aprilla is reslistic, just not common)
aprillia rs125 – 33hp though probably about 29. thats alot more than 1 per 10cc
needs a goldy track on it, then it would sound even better
85 cubic centimeters ?
39 horsepower ? …dont think so bud…maybe 3.9 HP, if you get 1 horsepower per 10CC (cubic centimeters) you're doing pretty* good geed even by todays standards, especially if you want the motor to run for more than 5
minutes
If 40hp is 85%, it will be around 47 at the crank. That`s pretty good hp rating. My old 71 lightning got 24 at it`s best. After having a top end overhaul, checking timing, changing jets… I got tired of not finding
the fault and sold it.. By the way, I get my top A10 readings at about 85mph in third gear. Changing to fourth calms it down immidiately after hitting top rpm.
thanks for leting me know this info
it wasent taken up to its max only 75 mph
i aso put a bsa lightning oif on the dyno at 80 mph puting out 40hp at the wheel
crank power max acording to bsa 52hp
but all in all im not to worried about hp
more the fact air fuel mixtuer. thanks for your coment .
Bsa (and everyone else) used to exaggerate (read: lie) their hp ratings for sale profit. If my math is somewhat right this puts you around 29hp. Not bad. Srm says that the most they have seen on a highly tuned A10 is about 49, if I remember right.
Hi, Nice Bike !
What is your setup?
pistons, cam, big or small inlet valves, jets, timing and any mods ?
I Friend of mine got 23 rear wheel hp on his stock Golden Flash. I`ve heard that the loss though drivetrain is 10-15%, I guess Old bikes have more loss so 15% would probably be about right. Sorry to disappoint you but adding 20 is just not right after my experience.
my 85 ccm got 39… lol
hi thanks for watching it recorded 24.7 at the wheel and i was told that the gear box and chain drives loses about 20hp. So ad 20hp
to get the engine hp 44.7
not far out
im confident with all my BSA's i enjoy traveling all over the uk, abrord and the isle of man.
use em properly thats what they are for
thanks for your intrest from rob
How many HP? Good to see some one confident in their BSA. Thanks fore posting.