Starting a Jawa DT500 Four Valve 

I had a Jawa 500 4 valve in 1981 to 83 when I was driving speedway in sweden. I can feel the sound from the past. Goran

Nice restoration. So cool to see an upright cylinder again :)

Wow, what a great sounding machine!

I can tell you had joy in fixing it up, it looks and sounds fantastic!

very very nice piece of racing history you've got yourself there definitely a sweet Jawa dt500 and I bet it would still be competitive today

Lovely, always my favourite Jawa..... I used to have a Briggo four valver...... Keep it mate, nice bit of history........

Love these bikes! Good job!

I read about those bikes and dreamed of riding one. I never realized they were so darned hard to start!

Superb machine. I have similar bike 10 years ago.

Really nice video mate.

Magnificent bike.

A thing of beauty

Pamietam jak sie scigali w Tarnowie na takich jak bylem dzieckiem. Cudowna maszyna.

Looks like a fun bike. Thing is sweet.

LOL! Yeah! she certainly took off when she fired and I had to struggle to bring her under control alright. The bike has given me an enormouse amount of satisfaction getting it going after so many years of gathering dust. It actually has an enormous amount of history including winning an Australian title many years ago (so I have been told)

Awesome bike !

just watching this i can damn near smell it loved it especially when there was a little nitro in the mix

Thanks pyrofella, The oil syringe is a commonly available item from any auto shop. I got mine from the local Auto One here in Australia for around the $8AUS mark, but depending where you are in the world, any auto shop will sell them. They're great for bleeding brakes as well.

At 0:30 You can just pull the spark plug and achieve the same results for the dry top end. Take the plug out, and wind the back wheel till you see the oil run through the oil pump tube. Or, drill and tap two holes with set screws above the cams on the valve cover, and inject oil into the valve cover. Either way, saves time and a gasket-- 3:25 Anyway, nice Jawa '894'--this is the 38mm Factory(1976-79) Mikuni carb side port. The 895 was a center port, with a Dellorto 34mm factory carb. This motor won many World Championships in sPeEdWaY, it received a bad reputation on the 'Amateur' circuit, because some guys didn't know how to time it, since there were no timing marks for the twin cam set-up.

Thanks for that. Having not cleaned out all the R40 from it the last time someone ran it was as if they had tipped a bucket of areldite down the top end and then left it for 20 years or so. The main challenge was cleaning all that out. I now run Penrite 50 or any other reasonable MINERAL oil in it. It still runs on Methanol though. Mind you I try to run it up every month or so - having said that, I'd better go out there now and give her a quick run up now! Maybe put your up on U Tube as well!

nice job I have a DT 500 makes me want to go start it

Remember these bikes well when Edinburgh had a track can still taste the speedway smell Cheers.

@TedsChopper I bet it does! Lovely looking bit of kit. I much prefer the uprights to the modern laydown engines...

the front tire looked flat to me. but only on the bottom ! all bikes are somewhat irresistable. very fabulous.

Beautiful machine.

What a cool thing !

Wow good engine.

Would love to see a video of you racing it!!

Great - now it's time for a ride in the town...

Your 1977-79? Jawa Twin cam side port has the outlawed factory 38mm Mikuni Carb. The FIM ditched this carb, and conformed all speedway carbs at 34mm, even to this present day. Nice M/C.

Truth of the matter is I've never raced one - my scene was more enduros and motocross. This bike kinda lobbed in my lap as a non running wreck, and being the person I am, I took enormous joy in fixing up and getting it running again. Even though I have run it around a track relatively slowly (and believe me, it wanted to take off), the only running it gets is once every couple of months or so as you see here. However, it would be good so see it ridden around a track the way it should be!

Just can't beat the sound an the smell of a speedway bike.

yeah nice job man

Beautiful...

Nice video! Have you any ideas into previous owners of the machine? Also how did you aquire it, eg where exactly was it rotting away in storage? Thanks.

CLASSIC BIKE

very good

2:22 looked for a second like you were going indoors!

It acts surprisingly user friendly considering. I trust there is no oil ring on the piston? I once got to try a friend's push-rod Jawa speedway bike in the mid '70s. Sure are clumsy to operate in an off track environment. Too bad the basic engine design didn't go into a street worthy version with unit construction and gas fueled, of course.

too bad they dont these old school mufflers are not allowed anymore. i remember those days... greetins from STAL RZESZOW SPEEDWAY TEAM

friggin sweet... my hayday. costa mesa california....

Like it ,If only I could smell the methane as well.

What a sound......!!!

Love that Jawa sound...nice rebuild .. where did you get that oil syringe from?.. I want one!

That's how Speedway bikes used to to look and sound

I LOVE SPEEDWAY - FALUBAZ ZIELONA GÓRA :-)

@samtromb Thanx Goran, sorry I haven't replied to you earlier (couldn't access my account). Where in Sweden did you race? (I love Sweden - it's a magnificent place). What level did you reach?

I've received a lot of requests, and dare I say flack about seeing the bike racing. Truth of the matter is I have never raced one of these bikes and before we were to even think of racing this one, it would have to be completely disassembled, inspected and re-built. Keep in mind, the bike was made operational again (from a completely seized state) with a whole lot of WD40 and mountains of oil syringed through all the oil galleries - the engine was never fully disassembled. I'm sure one day we'll give it a burn around a track in a classic race situation, however that will be after the motor is completely re-built (when I have the time and $'s to spend on it) and in the hands of a good rider!

Nice...:0

I love speedway.

@claudiusk8erul That's for sure - not sure what a Harley "Travidson" is but I do have a Harley Davidson chopper, and there's no way you would get that around an oval track as fast as the Jawa (LOL!)

Where do I buy one? Do you sell it?

My father would start those by hand spinning the wheel.

Czy do tych motocykli używa się klucza do sprzęgła o rozstawie otworów 130mm? Mam taki klucz i nie mogę go zidentyfikować co do czego. Podobno jest do sprzęgła i bardzo ułatwia robotę. Ktoś coś wie na ten temat?

iddle?

You can easily add brakes :L Obvious you'd have to modify it, indicators etc.

Do you think you could ever get one of these road legal?

No brakes? Yikes.

cz engine? I like the overhead cams

Глушитель не родной, мне нравится родной.

@1nickdanger Thanks for that. lol, no I didn't add any nitro to it (not a bad idea though, lol!), only methanol, which is what it runs on.

no breaks !!?

without brake system...?

bppga!

Pourquoi ce genre de moteur n'existe pas pour le grand public ? en plus pas de vitesse à passer.

what oil are you using???

they have no brakes

Ether or ethanol....

I thought these used ROTAX engines..?

nothing worse than a dry top end

Come la mia

Your front tire is flat...

It won't idle? Don't expect it to live long, revving a stone cold motor like that but hey, it's your machine...

re chetoooooooooooooo gatoooooooooooo

4 такта, а дымит как ушатанная Верховына.

это херня а не мотик

CZ PUSH