I think the 4 stud came in 1948. Though some say that some 5 studs was made in -49. My first speedway bike was a 5 stud JAP back in 1969. Not bad from tapes up to first corner, then the JAWAs with better handling frames took over. The 5 stud had an aluminium conrod which over time got longer. If not replaced in time the engine exploded. 4 studs has steel conrod. You had to have blacksmiths hands when changing from warm up spark plug to race plug.
It has been done, I have seen at least 2 examples here on TH-cam. Obviously the mods would depend on local regulations and laws, and it might not be able to happen everywhere.
@@TombstoneHeart I guess so. The vids I watched didn’t go into specific detail but they had rudimentary brake system with associated brake lights. And also the right side foot peg was removed or repositioned to another spot. I am not even sure what fuel they ran on either, I would guess regular petrol and not methanol. They had license plates attached too so one must assume they were somewhat road legal. I imagine some countries aren’t too fussed on maintaining some standards.
I think the 4 stud came in 1948. Though some say that some 5 studs was made in -49. My first speedway bike was a 5 stud JAP back in 1969. Not bad from tapes up to first corner, then the JAWAs with better handling frames took over. The 5 stud had an aluminium conrod which over time got longer. If not replaced in time the engine exploded. 4 studs has steel conrod. You had to have blacksmiths hands when changing from warm up spark plug to race plug.
Thank you for interesting information about The JAP engine. Its a friend of mine who own and ride this bike. I myself have a Jawa from 2006.
A dream bike of mine. Lucky you! 😊
Super. Prawdziwy motocykl żużlowy bez udziwnień z tłumikami itp. 👍👍
They were the best sounding engines of all .
I can almost smell the methanol and Castrol R 👌🎵
Это точно! 😊
The best Sound ......Jap 🥰
Wow, just wow. :)
Yeah luv that smell Castrol R !!!
Can't you just smell that Castrol R. Not so much an engine - more a work of art.
just love the 'Look' of these bikes!!!...could they be 'converted' too be Street Legal???...
Remember this bike is specialy made for Speedway, no breaks, no gears, no lights. So I dont think this is a Good Idea!
It has been done, I have seen at least 2 examples here on TH-cam. Obviously the mods would depend on local regulations and laws, and it might not be able to happen everywhere.
@@jswaggart01 The first thing you'd have to do is find a way of replacing the total loss oil system.
@@TombstoneHeart I guess so. The vids I watched didn’t go into specific detail but they had rudimentary brake system with associated brake lights. And also the right side foot peg was removed or repositioned to another spot. I am not even sure what fuel they ran on either, I would guess regular petrol and not methanol. They had license plates attached too so one must assume they were somewhat road legal. I imagine some countries aren’t too fussed on maintaining some standards.
Yes, with quite a lot of attention to street requirements. It has been done.
A 4 stud JAP on methanol?.... Real Brit engineering👍
It looks like 5 screws engine. Could be even older then 1952..
Ein Ohrenschmaus eine Jap
Put some throttle in on the bends zzzzzz
that's a jawa