Two Stroke Motocross

Two Stroke Motocross Forum => General Two Stroke Talk => Topic started by: TMKIWI on March 08, 2013, 10:28:57 PM

Title: The Truth
Post by: TMKIWI on March 08, 2013, 10:28:57 PM
http://www.nzherald.co.nz/motoring/news/article.cfm?c_id=9&objectid=10855487
Title: The Truth
Post by: ford832 on March 08, 2013, 10:45:02 PM
Sweet,good article.  8)
Title: The Truth
Post by: Stusmoke on March 08, 2013, 11:35:39 PM
The first part is flat out wrong. KTM makes their EXc, XC, XC and whatever other variations there are and Aprilla makes a 125 two stroke road racer, RS125 which is Legal for road use in (In Aus anyway). Yamaha hasn't lead any two stroke revolution, they've pumped out the same bike since 06 while KTM's two stroke lines, offroad and motocross have been selling like hotcakes. KTM is the manufacturer that is consistently changing the bike and usually for better.
Title: The Truth
Post by: TMKIWI on March 08, 2013, 11:40:12 PM
He's talking about MX not offroad stu.
Different rules.
Title: The Truth
Post by: Stusmoke on March 08, 2013, 11:41:29 PM
He's talking about MX not offroad stu.
Different rules.

He mentioned dual sport and superbikes in the first paragraph, thats where I was headed. Everything below that was well written though. A no BS attitude is what magazines need.
Title: The Truth
Post by: msmola2002 on March 08, 2013, 11:48:14 PM
RS125 is no longer sold in oz. They started selling a 4 stroker last year I think?
Title: The Truth
Post by: msmola2002 on March 08, 2013, 11:50:30 PM
http://www.bikebiz.com.au/products/Aprilia-RS125.html

not quite correct - last ones are being sold now

Title: The Truth
Post by: Stusmoke on March 08, 2013, 11:59:32 PM
http://www.bikebiz.com.au/products/Aprilia-RS125.html

not quite correct - last ones are being sold now



I can understand people preferring four strokes for street riding. Ease of use and fuel economy at low RPMs is what you'd need.
Title: The Truth
Post by: factoryX on March 09, 2013, 12:44:11 AM
http://www.bikebiz.com.au/products/Aprilia-RS125.html

not quite correct - last ones are being sold now



I can understand people preferring four strokes for street riding. Ease of use and fuel economy at low RPMs is what you'd need.

Actually, most series don't allow two strokes to race. And as for fuel economy, r6's are reporting 29mpg if you ride the bike the way it was designed(45mpg if you cruise and do nothing else), so what fuel efficiency are you talking about?  The NSR500 was unmatched in the end and was put down because of it...
Title: The Truth
Post by: Stusmoke on March 09, 2013, 12:53:23 AM
http://www.bikebiz.com.au/products/Aprilia-RS125.html

not quite correct - last ones are being sold now



I can understand people preferring four strokes for street riding. Ease of use and fuel economy at low RPMs is what you'd need.

Actually, most series don't allow two strokes to race. And as for fuel economy, r6's are reporting 29mpg if you ride the bike the way it was designed(45mpg if you cruise and do nothing else), so what fuel efficiency are you talking about?  The NSR500 was unmatched in the end and was put down because of it...

Huh? Really? So two stroke onroaders are actually more efficient? How amusing. I wonder how much longer manufacturers can afford to push this four stroke bullshit. I'm actually pretty sure I could get better mpg out of my 125 and it barely functions.
Title: The Truth
Post by: 2T Institute on March 09, 2013, 01:10:20 AM
Aprilia only makes parts for RSW ans RSA 125's you could never buy a new one only lease, the RS 125 road bike is it's last year of production and derestricted with a 34mm VHSB carb they get about 9litres/100km(when used properly) about what my Ford Falcon averages. The RS125 is in every way a far faster and better learner legal road bike than the shitter CBR 125 and Ninja 250.
Title: The Truth
Post by: SachsGS on March 09, 2013, 01:14:01 AM
This guy must be smoking crack. Yamaha hasn't updated their YZ 2T line in years while manufacturers like KTM and TM haven't stopped. I can't recall the last time I saw a Yamaha 2T while every pickup that flies by has a KTM, usually 2T, or two in the back. The Yamaha franchise in my town has changed hands so many times I've lost track.
Title: The Truth
Post by: twosmoke595 on March 09, 2013, 04:55:42 AM
yes yamaha hasn't done much for the 2 stroke in a good while BUT they still make a really good bike, that is competitive even after all these years. I still see a ton of yamaha 2 strokes in my area. Plus in Oz dont they kit them stock with the new UFO plastic and gytr goodies? maybe that's why the resurgence. There are however more and more ktm's both 2 and 4, its really cool to see kids flying around the tracks on a 125/150, giving 250 and 450A riders fits
Title: The Truth
Post by: msmola2002 on March 09, 2013, 05:10:34 AM
the RS 125 road bike is it's last year of production and derestricted with a 34mm VHSB carb they get about 9litres/100km(when used properly) about what my Ford Falcon averages.

Round town I was getting around 9L/100 with my RGV, and funnily enough on a ride down wollombi rd cruising at 120-145km/h I think I got as good as 6.5 but that was the only time in the time I rode it that it was ever that good. RMX on public rds was easily a good 10 or more.
Title: The Truth
Post by: Stusmoke on March 09, 2013, 07:35:56 AM
the RS 125 road bike is it's last year of production and derestricted with a 34mm VHSB carb they get about 9litres/100km(when used properly) about what my Ford Falcon averages.

Round town I was getting around 9L/100 with my RGV, and funnily enough on a ride down wollombi rd cruising at 120-145km/h I think I got as good as 6.5 but that was the only time in the time I rode it that it was ever that good. RMX on public rds was easily a good 10 or more.

I do not get how a 1 litre V twin can get economy equal to a 4 litre 6 cylinder falcon. Roughly 4 litre anyway.
Title: The Truth
Post by: factoryX on March 09, 2013, 01:58:57 PM
That RS125 was sort of a lemon, but was getting 30-32mpg, which is hilarious as that is about the mileage I'm getting with my yz250 on the trail(Hauling ass). There was a reason people were switching out those aprilia motors.
Title: The Truth
Post by: SachsGS on March 09, 2013, 03:22:44 PM
Motorcycles have high drag coefficients compared to automobiles as well as being in a different (higher) state of tune. This is why I don't really understand electric motorcycles (not scooters) - high drag and no room for batteries.
Title: The Truth
Post by: msmola2002 on March 09, 2013, 05:07:22 PM
the RS 125 road bike is it's last year of production and derestricted with a 34mm VHSB carb they get about 9litres/100km(when used properly) about what my Ford Falcon averages.

Round town I was getting around 9L/100 with my RGV, and funnily enough on a ride down wollombi rd cruising at 120-145km/h I think I got as good as 6.5 but that was the only time in the time I rode it that it was ever that good. RMX on public rds was easily a good 10 or more.

I do not get how a 1 litre V twin can get economy equal to a 4 litre 6 cylinder falcon. Roughly 4 litre anyway.

rgv is a 250cc v-twin.
Title: The Truth
Post by: 2T Institute on March 09, 2013, 07:53:06 PM
the RS 125 road bike is it's last year of production and derestricted with a 34mm VHSB carb they get about 9litres/100km(when used properly) about what my Ford Falcon averages.

Round town I was getting around 9L/100 with my RGV, and funnily enough on a ride down wollombi rd cruising at 120-145km/h I think I got as good as 6.5 but that was the only time in the time I rode it that it was ever that good. RMX on public rds was easily a good 10 or more.

I do not get how a 1 litre V twin can get economy equal to a 4 litre 6 cylinder falcon. Roughly 4 litre anyway.

RS125 is a single cylinder 125, the 130kgs wet weight doesn't help
Title: The Truth
Post by: msmola2002 on March 09, 2013, 08:15:33 PM
Yeah the rgvs were a little porky for a 250, but I think they came in under 3 cwt, so could be worse
Title: The Truth
Post by: Stusmoke on March 10, 2013, 05:14:21 AM
the RS 125 road bike is it's last year of production and derestricted with a 34mm VHSB carb they get about 9litres/100km(when used properly) about what my Ford Falcon averages.

Round town I was getting around 9L/100 with my RGV, and funnily enough on a ride down wollombi rd cruising at 120-145km/h I think I got as good as 6.5 but that was the only time in the time I rode it that it was ever that good. RMX on public rds was easily a good 10 or more.

I do not get how a 1 litre V twin can get economy equal to a 4 litre 6 cylinder falcon. Roughly 4 litre anyway.

rgv is a 250cc v-twin.

Then that makes the case for it even worse lol.
Title: The Truth
Post by: factoryX on March 10, 2013, 06:29:18 AM
Not really, that's a carbed 250 with twin 125 cylinders, and it is tuned for semi full performance. So, 25-32mpg from a 250cc twin that will pull 120-140mph isn't that bad. With modern carbs AKA electron or APT, or EFI expect it to be closer to 40mpg. As for the RS 125 motor, it was honestly a turd.
Title: The Truth
Post by: msmola2002 on March 10, 2013, 07:14:17 AM
that will pull 120-140mph

140 maybe with modified gearing. and a tailwind. and a 120lb rider. Off a cliff.

Saw about 200km/h at eastern creek, my cousin saw about 206-208 on his before it ran out of gears.

no go with aftermarket carbs. Downdraft.
Title: The Truth
Post by: 2T Institute on March 10, 2013, 09:29:23 AM
As for the RS 125 motor, it was honestly a turd.
Rotax 123/122 is great engine. Recntly at the salt races a modified RGV got 210kmph a track based RGV got 202kmph, these a performance two strokes and fuel economy shouldn't be mentioned in the same sentence
Title: The Truth
Post by: bearorso on March 10, 2013, 11:54:34 PM
The Key thing about that article, is that it was printed / published in a Mainstream Newspaper .

When have you seen this sort of thing in the LA Times, Washington Post, NY Times / your major cities Newspapers / News Sites?

That there are inaccuracies - is disappointing, and, sadly, to be expected these days. 'Journalists' should make an effort to get it right, it's their job to get facts straight.  ::)

But, look at the inaccuracies / mistakes made here on this thread by posters. It happens.

As for the street RS125 - well, look to what is replacing it. A bloody 4t 125. I'd rather ride a learner spec RS125 (and they are not much fun - compared to derestricted ones), than the RSV125 (I think it strangely has the 'V' designation?).

Aprilia, bear as much responsibility as Honda in the demise of 2ts, especially in Road Racing, as I've pointed out many times. Bastards, equally. 

I wish I had the unallocated money to snaffle the last of the RS125 Road Bikes. A mate has snaffled nearly every last version of Sports 2ts, over the space of near 30 years - as well as numerous 4t Superbikes. He's recently wheeled a 'last of the line' RS125 into his workshop / gallery. Bottomless pockets can sometimes be put to good uses. 8)
Title: The Truth
Post by: Stusmoke on March 11, 2013, 12:23:01 AM
The Key thing about that article, is that it was printed / published in a Mainstream Newspaper .

When have you seen this sort of thing in the LA Times, Washington Post, NY Times / your major cities Newspapers / News Sites?

That there are inaccuracies - is disappointing, and, sadly, to be expected these days. 'Journalists' should make an effort to get it right, it's their job to get facts straight.  ::)

But, look at the inaccuracies / mistakes made here on this thread by posters. It happens.

As for the street RS125 - well, look to what is replacing it. A bloody 4t 125. I'd rather ride a learner spec RS125 (and they are not much fun - compared to derestricted ones), than the RSV125 (I think it strangely has the 'V' designation?).

Aprilia, bear as much responsibility as Honda in the demise of 2ts, especially in Road Racing, as I've pointed out many times. Bastards, equally. 

I wish I had the unallocated money to snaffle the last of the RS125 Road Bikes. A mate has snaffled nearly every last version of Sports 2ts, over the space of near 30 years - as well as numerous 4t Superbikes. He's recently wheeled a 'last of the line' RS125 into his workshop / gallery. Bottomless pockets can sometimes be put to good uses. 8)

30 or so years from now when everything is running off a renewable energy source, those things will be worth their weight in gold. That dude might have spent alot on his collection, but if he decides to sell them all much later, its gonna be worth it.
Title: The Truth
Post by: factoryX on March 11, 2013, 12:45:10 AM
Lawl, look on Aprilia forums, they struggle to get 36hp at of the rs125. The motor is a turd. And once you start pushing 34-36hp, the whole motor starts to fall apart. I wasn't joking about people switching the motors out.
Title: The Truth
Post by: 2T Institute on March 11, 2013, 02:39:24 AM
Lawl, look on Aprilia forums, they struggle to get 36hp at of the rs125. The motor is a turd. And once you start pushing 34-36hp, the whole motor starts to fall apart. I wasn't joking about people switching the motors out.

Well the bikes used in a Spanish CEV spec class all made about 29kW at the wheel. Please tell me you have actual experience with this motor rather than base your conclusions on on bikes with engines maintained by 16yr olds on forums.
Title: The Truth
Post by: msmola2002 on March 11, 2013, 04:19:34 AM
You mean that PJME is not the internetz pinnacle of motorcycle tuning? say it ain't so!
Title: The Truth
Post by: riffraff on March 11, 2013, 05:34:08 AM

"APRILIA RS125 - $3200   2009. Euro wiring harness. All stock. 550miles."

So is it worth it, it's on Craigslist
Title: The Truth
Post by: Jeram on March 11, 2013, 05:38:21 AM
You mean that PJME is not the internetz pinnacle of motorcycle tuning? say it ain't so!

hahahha
Title: The Truth
Post by: factoryX on March 11, 2013, 07:23:53 PM
Well isn't it? Why do shop owners hate the internet? Why do doctors hate google? Most of Doctors trying to diagnose something will actually google symptoms! Showing Dyno graphs on the internet vs. me going out to build my own set up. Why should I build something that someone else has already done let alone posted the information about their build? Is that not what you're doing by saying the bike is good? Why should we or I follow your advice? Its on a forum full of people that have never touched a bike, what makes you any different?
Title: The Truth
Post by: factoryX on March 11, 2013, 07:25:22 PM

"APRILIA RS125 - $3200   2009. Euro wiring harness. All stock. 550miles."

So is it worth it, it's on Craigslist
Yes, right now any street legal 2t modern sport bike is worth that price.
Title: The Truth
Post by: Jeram on March 11, 2013, 09:34:35 PM
Im not sure what is 'lemony' about the rs125 motor.

its a 15 year old design, goes 10,000km between top end rebuilds and 20,000km between bottom end rebuilds.

With simple porting, pipe and carb you can bring the bike up to and beyond what a modern 125MX engine can do.

But yes I agree, the optimum thing to do is swap out the rotax 123/124 and then insert a rotax 128 disc valve motor (no frame mods) or 257 motor (minor frame mods).
Title: The Truth
Post by: streaks383 on March 11, 2013, 11:21:47 PM
If anyone is looking for a 2T road bike project I found this one in central Ohio.

http://columbus.craigslist.org/mcy/3653827478.html

Suzuki GT750
Title: The Truth
Post by: _X_ on March 11, 2013, 11:45:18 PM
all right boys the truth is....























this is'nt pretty!HA!AH!HA!
Title: The Truth
Post by: Stusmoke on March 12, 2013, 12:00:20 AM
all right boys the truth is....























this is'nt pretty!HA!AH!HA!


Racer X I think we were all a little unclear on what your sexuality now I think its clear as day.

Its good we've all got some closure :D
Title: The Truth
Post by: beaner on March 12, 2013, 12:03:09 AM

"APRILIA RS125 - $3200   2009. Euro wiring harness. All stock. 550miles."

So is it worth it, it's on Craigslist

I wish I could get one here for that.

We can get them new, but they're a little more than double that price. Too rich for me.
Title: The Truth
Post by: _X_ on March 12, 2013, 12:09:18 AM
HA!HA!HA!HA! AH! i kill me.
Title: The Truth
Post by: factoryX on March 12, 2013, 12:13:33 AM
Lawl.  That H1 drag bike project would be cool but I would end up throwing it into a modern chassis.
Title: The Truth
Post by: riffraff on March 12, 2013, 04:59:49 AM
Racer, you gotta quit listening to your vagina, next thing we know you'll be riding a 150F   ::)
Title: The Truth
Post by: _X_ on March 12, 2013, 11:44:41 AM
HA!
Title: The Truth
Post by: Stusmoke on March 12, 2013, 11:12:35 PM
Racer, you gotta quit listening to your vagina, next thing we know you'll be riding a 150F   ::)

Hey now, I know 3 kids that ride 150Rs and are perfectly cool! Of course they're also not even close to the speeds of kids on 85s and they wear clogs with socks :D No kidding either, clogs with socks and riding pants, jersey aswell.

Thats my country :D
Title: The Truth
Post by: _X_ on March 13, 2013, 01:11:29 AM
your in the nederlands stu?
Title: The Truth
Post by: eprovenzano on March 13, 2013, 01:14:55 PM
I kill me.

some times we can only hope...    :o
Title: The Truth
Post by: _X_ on March 13, 2013, 02:17:08 PM
ha!
Title: The Truth
Post by: Stusmoke on March 15, 2013, 12:55:10 AM
your in the nederlands stu?

hehehe I wish, this is the great country of Australia! Where we give people 18 years prison for murder. Theres almost TOO MUCH justice going around here these days...
Title: The Truth
Post by: 2T Institute on March 15, 2013, 01:57:19 AM
You mean that PJME is not the internetz pinnacle of motorcycle tuning? say it ain't so!

No and they had not the slightest idea how to 'fix' the big end bearing  ;)

That Craislist bike is a steal crap examples go for that money here a 'Spain's No1' for much more