yamaha v4 2 stroke 125 race bike

super rare yamaha race bike at 2010 classic bike festival in pukekohe

[@ColdSmokes]

@1100HondaCB This bike actually ran under 10,000rpm unlike the honda 5. The honda 5 was nothing to sneeze at but never dominated the 125 class like this ra31 did. This bike was the1st 125cc bike to do a 100mph lap at the IOM in 1968 with Bill Ivey in control. I believe Phil Read did it also though. This made 44hp @17000rpm and had a 9 speed gear box .-I gather that this gentleman(Ferry Brower) put all of his rare gems in action this year for the big aniv at the IOM. VIDEO ANYONE ???!!!

[@cidertom5140]

Several sites say 17,500rpm.

[@sirclip]

Love this post! One of these ridden by Bill Ivy averaged 100+ MPH lap in the 1968 TT in the Isle-of-Man. Yeah, and on those tires!

[@jeelink9187]

wow!

[@stevematz7354]

That is the little RA31A Rocket that won 2 consecutive FIM World Championships. 1967 as the RA31 by the late Bill Ivy (1942-1969) and 1968 RA31A by Phil Read. The 67 bike was the RA31 which was essentially a scaled down version of Yamaha's 250cc RDO5. The engine was a liquid cooled V4 using a rotary disc valve intake system. Power output was 40hp. Extremely rare, probably only a couple left in the world. Bill Ivy tragically died in 1969 during practice at a race venue in East Germany while riding a JAWA ....

[@tonypate9174]

Thanks for the "info" you may enjoy on you tube ----CLASSIC TT LAP OF HONOUR START UP GATE 2013 if only for the pre war DKW @ 1,10 ish

[@paulallenMacca]

Nice video i had a Yamaha TZ125H in 1986.

[@johnr6292]

Timed at 144mph at the 1967 TT only 8 mph slower than Agostini's 500cc MV.

[@ColdSmokes]

@rikwalker917 Ummm, this is one of the rarest 2 wheeled machines ever built. I believe only two currently exist on the planet and both are reproductions. These were raced with great success for only 2 years(1967 and 68) by the best and brightest in the world.

[@jraybay]

If you listen closely... you can hear the bike begging to be let loose :(

[@2stroke4me]

Glorious symphony! Bikes like these should race in the 125 class nowadays instead of the lawnmowers they use now!

[@Yurrah]

You might like it or not but i still think this is of great historic value for all bikers.

[@survivor194]

Gee, I wish my smartphone would emit the sweet smell of burning castor oil.

[@bri879]

The great Phil read allways road with his hand on the clutch lever because of the stroker seizing on him,on one such occasion he was passing Jim redman on the honda 6 when his v 4 250 decided to stop reving

[@wontputrealname]

+bri879 Bill Ivy was killed in 1969 when the Jawa 500cc V4 seized. I don't think it was during a race though.

[@1100HondaCB]

Wow, I am totally blown away! I heard Kawasaki did a KR3 (4cyl 2stroke), but never believed it. This is the first time I've come across this. I love the high pitch scream. I wonder if this beat Honda's 5cyl 4stroke 125.

[@waveman1500]

Awesome bike, nice video mate.

[@janmarsh]

To state this little machine is a V4 is not accurate. That suggests all four con-rods were on one crankshaft.......... not so. It was a two twin crankshaft configuration, one crankshaft set above & forward of the other & mechanically coupled. It was said Bill Ivy tap danced on the gears & sounded like a bubble bee when he managed to become the first rider to average 100mph around the Manx course on a 125cc machine. Same configuration for the 250cc four as I recall.

[@sirclip]

Bill Ivy averaged 100MPH on a lap (38 Miles) at the Isle of Man TT in 1968 on one of these!

[@PenttiTolonen]

You can see and hear the same bike running in Imatra 2010 in my video "Yamaha RA31A 125cc V4 in Imatra memorial GP 2010 "

[@amccullough]

You can see the smoke from pipes 3 and 4 at the bottom, even tho the pipes are hard to see.

[@TheBONZOID]

Sixties two stroke GP bikes were fairly prone to seizure, mechanics at the time erred on the side of caution & often jetted them to run a little rich, thus the smokescreen!

[@ianharrd]

sound like it just wants to take off ... Awesome!!

[@CosmoxYRik]

I think two strokes are pretty awesome, but you can see why no one wants to be behind them on group rides.

[@RDEnduro]

so it doesn't idle then

[@MrDenniski]

Stunning bike

[@barthoedemaker]

They do run a bit to much oil mixture. It can burn lean without the smoke. I usually use 1:45 on two stroke race engines and that's proven enough. To bad they almost died out, and 4-stroke took over. Two stroke is in your blood or not!

[@blagahaga]

So i'm guessing you don't usually warm up your two stroke...?

[@ClassicTrialsChannel]

you cant beat the smell of racing 2 stroke oil with avgas it gets the hair on the back of the neck up lol

[@SoyBoySigh]

I for one, would love to see more details of the bike's construction. Maybe that's what the wwwaaaannnkkkeeerrr meant!

[@Lanny615]

@burghill1979 Oh! the lovely smell of Castrol R from a 2 stroke!

[@tpvalley]

@burghill1979 I agree, 2 stroke smell is like aromatherapy, it makes me feel good!

[@bellapetuttidario93]

bicycle?

[@netharad-cx1nb]

125 🤩maquettes, ambraiyage a sec 💥 Qui fesai les CAMES DOUBLE AVANT, GRIMECA ✨

[@ironDsteele]

I can't even imagine what that thing revs too

[@browny993]

@DeVoN420zz thats how a 2 stoke should be warmed up

[@trblcumn]

@trunk39able KTM has a clean air 2 stroke 900 twin in works, How about a 2 stroke porsche 911

[@winterstellar]

What? the four cylinder??

[@tribulation138]

jeez. that thing smokes more than my chainsaw

[@pmay222]

like a swiss watch

[@idriftf1]

@DeVoN420zz lol it's being warmed up

[@huguesamal]

NIce sound this RA31 !!!!!

[@nilsonlucas2783]

H.P?

[@Holydiver7019]

Does Yamaha Japan own the same model ?

[@rockypupoxo]

?????????

[@trunk39able]

A fascinating piece of racing history.The ultimate 125cc two stroke.They kill off the 125cc class next season so effectivley killing the 2 stroke engine in gp racing for good.Shame really,

[@jocelynmercier6310]

I see this bike on swetzerland (St Sergue hillclimbing)

[@KOPP6650]

really...three whole minutes of ziiiiinngg ziiiiiiing ZZZIIIIINNNNGGG!

[@tekboyg]

Sounds like a crack fueled chainsaw on steriods...Love it!

[@eamh2002]

@powertoweight100 3mins isnt long :o

[@2stroke4me]

Holy Smoke :-)

[@skingraph666]

yeah it is :D yay two strokes

[@stephenjames2920]

sounds like my suzuki er 100 with no tailpipe

[@guri131]

9 speed gearbox FTW

[@davidmesa9400]

yamaha RD125 1965

[@vesukarvonen8161]

Yes. Ääni on yhtä matavaa kuten aikoinaan Imatralla Suomessa.

[@juhajuaranen9576]

+vesu karvonen kaks tahdeista ei ikinä seuraa mitään hyvää

[@12valvepower4]

sweeeeeeeeeet

[@burghill1979]

sounds like my mum on a good day or should that be a bad day!!!!

[@moortemraph3815]

Shure this is not a twin ?

[@rockypupoxo]

Its a fucking V4 you div !!!

[@professorfidelcat]

single 2 stroke already so zingy, never been around early enough to ride a v4 2 stroke!!! too bad video doesn't show its prowess while let loose on the road! must be a true 100mph bike even with a mopedy 125cc displacement

[@cidertom5140]

professorfidelcat this is a 125 V4

[@cidertom5140]

single 2 stroke??? self expanitory

[@cidertom5140]

no he didn't hem mentions it after calling it a single.Yamaha built 250 350 v4's all two strokes

[@cidertom5140]

yipee!!!!!

[@DeVoN420zz]

reving the fuck out of it cold wtf

[@schlusselmensch]

Sweeeeeeeeeeeeeeeeeeeeeeeeeeeeet

[@bongosrest]

spoilt only by some muppet reving up a diesel in the back ground

[@wontputrealname]

+bongosrest not a diesel but a four stroke racing machine.

[@richard4165]

That's what he meant. Two stroke racers used to call four strokes "diesels".

[@chargincobraa]

@seribupulau WWWAAAANNNKKKEEERRR!!!!

[@Nutguy95]

zzzzzZZZZZzzzzzzzZZZZZZzzzzzzzZZZZZZzzzzzzzzZZZZZZZZ Current soundtrack in my head LOL

[@itsWOAR]

mmm, skip to 3:00 and watch.

[@yuvrajhorizon999]

carburetor not set properly ,, or the plug has extra gap

[@kurosaki0001000]

@chargincobraa LOOOOOOOLL

[@rikwalker917]

this bike is not rare, when i was a kid this is what everybody raced, the 125, 250s 350s and 500s and yes the wonderful 700s

[@moortemraph3815]

that's right , sorry ;)

[@JOHNMINKA]

SEEN ONE OF THESE AT TT 1965 RACE THIS IS JUST WORMING UP THE ENGINE REVS LIKE HELL ON FULL CHAT YA CAN GET HOOKED ON CASTROL R WHY DO YAMAHA SCRAP ALL THEIR BIKES WHEN THEY MOVE ON AND NOT SAVE LIKE HONDA DOES?

[@123pvpworld]

no match for my yz 250

[@rockypupoxo]

Yeah ok , keep taking the pills ...

[@seribupulau]

booooorrrrrrriiiiiiinggggggggggggg

[@renevandort7015]

Beeld is super slecht....amateurisch