Great vid Mark had a purple one myself I raced mine up didn't have an expansion chamber but it did fly 65 down hill went to Southend and back Reg Number HLA 62N don't know if it still going amazing machine
The mod that real does the most to increase power after all the usual porting, jetting up blueprinting etc is to remove a certain amount off the trailing edge of the fibre disc valve. easy job and gets more fuel charge into the combustion chamber. it ups the rev range and compliments the raised exhaust port mod. 55-60+ mph is certainly possible then. use only the very best synthetic racing two stroke oil. actually with one "experiment" my friend did back in the day was such extreme exhaust/disc valve mods were tried that the bike was revving to 15000+ rpm that with its small cast iron barrel it was overheating and seizing so he tried "Castrol R" Racing mineral oil and vollia. no more seizing.
Castrol R - either R30 (recall buying this many years ago) or R40 - is Castor-based. It does tend to help “marginal” or highly stressed engines last, though. Needs substantial and frequent maintenance to deal with the carbon and gum. R30 tends to be hard to find. R40 tends to be a bit more available in much of the world.
How in hell those engines managed to take all of the tune-up tweaks etc to get a few more HP without exploding is a testament to how well Japanese 2-strokes were built.Brilliant fun
Class whatever you had - I had a Fantic SuperT - went well....then, at 17, I went and got an RD250 Air-cooled - expansion pipes, Silver with Red stripes - doing the most mental things on it - only knew one position for the throttle - I wonder to myself 'what do the poor young f__ks have today????' cos I think they've got nothing apart from mobile phones, electric scooters and Mandbags .....it really is pretty sad - you have to feel for them - they'll be nothing and they'll have done nothing and you can't just say "it'll work itself out" as my Dad said and it did ... cos it won't
That Kenny Roberts 1978 RD250 is just delicious 😋
I had an FS1E-DX in 77 and then as it had an electric start, a blue RD200 in 78
Happy days 😊
I found the RD 200 engine was too fast for the frame. Yes, you could pull wheelies where the RD250 couldn’t. But the 250 handling was better.
Legend has it the purple ones were always faster. Great vid. that took me back to the 70s, can almost smell it 👍
Oh the smell of blue smoke in the morning. 😎😎😎😎
Takes me back had a fizzy back in the early 80's, one up on those in the school car park with a Sukuzi AP50 or Honda SS50.
Fs1e days great times my mates had fantics and ap50s.
KTM Comet Cross for me. An arm wrenching 3 BHP.
Great vid Mark had a purple one myself I raced mine up didn't have an expansion chamber but it did fly 65 down hill went to Southend and back Reg Number HLA 62N don't know if it still going amazing machine
Go on DVLA site and put the number plate in search engine. It tell you if it’s still around.
No Vehicle Details on HLA 62N Mate
The mod that real does the most to increase power after all the usual porting, jetting up blueprinting etc is to remove a certain amount off the trailing edge of the fibre disc valve. easy job and gets more fuel charge into the combustion chamber. it ups the rev range and compliments the raised exhaust port mod. 55-60+ mph is certainly possible then. use only the very best synthetic racing two stroke oil. actually with one "experiment" my friend did back in the day was such extreme exhaust/disc valve mods were tried that the bike was revving to 15000+ rpm that with its small cast iron barrel it was overheating and seizing so he tried "Castrol R" Racing mineral oil and vollia. no more seizing.
Castrol R - either R30 (recall buying this many years ago) or R40 - is Castor-based.
It does tend to help “marginal” or highly stressed engines last, though. Needs substantial and frequent maintenance to deal with the carbon and gum.
R30 tends to be hard to find. R40 tends to be a bit more available in much of the world.
How in hell those engines managed to take all of the tune-up tweaks etc to get a few more HP without exploding is a testament to how well Japanese 2-strokes were built.Brilliant fun
Takes me back. I used to have a yellow DX OTF523R No idea if shes still about.
My 1st fizzy was XFT523R pretty close.
I have a mint purple one bored out to max oversize Racoon tuned and pretty quick with my 13.7 stone on it...good for 55 mph more downhill
Just the sounds take you back 🤣
Tell the truth how many got over 50mph in standard form, 😃
Nice vid mate
Class whatever you had - I had a Fantic SuperT - went well....then, at 17, I went and got an RD250 Air-cooled - expansion pipes, Silver with Red stripes - doing the most mental things on it - only knew one position for the throttle - I wonder to myself 'what do the poor young f__ks have today????' cos I think they've got nothing apart from mobile phones, electric scooters and Mandbags .....it really is pretty sad - you have to feel for them - they'll be nothing and they'll have done nothing and you can't just say "it'll work itself out" as my Dad said and it did ... cos it won't
Where's Karl