OzVMX Forum
Clubroom => Bike Talk => Topic started by: justanothercgrader on January 14, 2013, 04:50:10 pm
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Hi guys,
Whats your opinion of such a build for motocross ?, i already have both the donor bikes.
It could be used in the Pre 85 250cc and open class
Or 50 years and over class, that me.
Or Pre 85 125 cc class?, back in the day i thought that up to 200cc four strokes where in the 125cc two strokes class , or am i dreaming?
It would look similar to this,
http://i252.photobucket.com/albums/hh23/mcphotonut/200right03.jpg
Your thoughts, Mark
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I can't help but think what a lot of work for such a big loss....
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if you're factoring fun into the equation it wouldn't be a bad thing ;)
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Fun Fun Fun I had a XR 200 engine in a 84 Husky frame and I'm building a new one in a RM / N frame the bike was slow but I smiled the whole time and on single track Vinduro there fast remember XR 200 won enduro's in the 80's
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What does it do better than a stock 84 CR125?
You'd get smashed by the 250 MXers off the start. While you will be able to reel in some of the slower riders over the course of the race, it would take an exceptional set of circumstances to get more than half way through the pack.
Not legal for the 125 class, BTW.
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All depends on how much grunt you want, I would rather put a 1980,81,82 XL,XR500 donk in a CR250,500 1984 frame 8)
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What does it do better than a stock 84 CR125?
It would sound better........ :D
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What does it do better than a stock 84 CR125?
You'd get smashed by the 250 MXers off the start. While you will be able to reel in some of the slower riders over the course of the race, it would take an exceptional set of circumstances to get more than half way through the pack.
Not legal for the 125 class, BTW.
But won,t they all pull over when they see the awsomness of it?
The CR125 i have is only a roller,
Although i dream of it being unique, i certainly dont want to get lapped in the first lap either.
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No it wouldn't Tony. My 84 125 sounds sweet. It even has usable bottom end power (surprisingly). I don't think an XR200 would get near it anywhere. I don't remember an XR200 winning anything. Good for learning how to ride, then move on. How would you fit a carby and air box on it?
Cheers, Grahame
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Go for it. It will be great fun.
You won’t get the holeshot but you won't be to far back, then when all the 2t’s are on the brakes you will still be on the gas and you will be able to out brake and turn in under most 250s. You won’t be worn out towards the end of the race and you will finish in the about same place you would if you were on any Pre85 250.
With a big smile on ya dial.
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In 1992, whilst working at the 6 days in Cessnock , one of the workers had a multi hybrid CR/XR/XL that was actually registered (as a XL185).
If I remember correctly, it started as a XL185, then grow a big bore XR200 top end, then rebuild again with big cam and piston, then went into a stock CR125 frame, then worked the suspension, To cap it off he made all this stainless stuff to bling it up.
Sure on the transport sections it would have been a dog but I was told once he got to the single track everyone was minced.
I'll never forget the sound when he started it up. The crack in the exhaust was very similar to the moderns now. Sure it cost him a bomb, but fun was in the making it and making it go.
Would I do one of these Frankensteins, in a heard beat! Most of the fun is in the dreaming!
Peter B
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I'm with Noel, I reckon it would be a hell of a lot of fun to ride unless you're my size. :D
But the bottom line is if you reckon it will be fun to build and ride, then it's a good idea.
Do it! ;D
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An 84 CR125 would have about 32hp. An XR200 has 18hp. It weighs more and the weight is higher up. It would use less fuel and have a less vulnerable exhaust. If anyone can ride a hybrid like this very fast it is because he/she is a very fast rider, not because the bike gets faster with about half the horsepower.
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I'd build it just to sit in front of the Coonara with a 6 pack of Jimmys and talk shit about how I holeshotted every race coming home in the top 5. Like most of us we've won more races on a Thursday night after a few cans than Bill Nilsson ever did. Agree it wouldn't be a championship winning bike but it old be a hell of a lot of fun and would generate more campfire bullshit than a standard CR125!
Go for it.
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If anyone can ride a hybrid like this very fast it is because he/she is a very fast rider, not because the bike gets faster with about half the horsepower.
Your right but it’s all relative.
You would have to time the rider on the 125 and then time the 200, this is the only way you can know if the bike is faster or slower for THEM. I would bet you would find there would only be 1 or 2 seconds difference either way. If the rider is not that fast my money would be on the 200.
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If you build it you will have a one off,and something that will spark the imagination of alot of others.
Its good to think outside the square, and not become one of the cardigin wearing 2 stroke brigade who believe anything out of the ordinary is a waste of time. Who knows you may just prove them wrong ;D
Hell it would be boring if we all rode the usual run of the mill MXer, aaah oops thats what most of them do ::)
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I'm with Graeme. Rider for rider the CR 125 would smash the thing in all but probably the worst conditions (and probably even then). Put your money and effort into something that'll have you at least racing against other people and not the calendar.
The 125 also sounds a lot sweeter..... :)
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I can appreciate the workmanship and time that goes into some of these hybrid bike builds. It shows how clever and skilful the builder is. I just doubt that it is ever worth the effort if your main aim is to make the bike faster. Different, sure.
What is the general consensus to the butchering of good bikes in the Euro twin shock class? Is this any different just because it is a lowly 125?
I think the first post was asking if it would be a good idea to mate a CR roller with an XR200 with the aim to VMX it. The obvious answer is no. It would be slower under all MX conditions. It also puts the bike up a class.
I'm not against 4-strokes, love them actually.
Cheers, Grahame
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Rider for rider the CR 125 would smash the thing in all but probably the worst conditions (and probably even then). Put your money and effort into something that'll have you at least racing against other people and not the calendar.
There ya go. Build nothing ::)
I agree
The 125 would sound better, if it had a motor.
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the 82 xr200 has single shock and fairly long travel forks std why not shove the cr suspension into one of those then bomb the motor out,you can even stroke/bore them to 230cc
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What is the general consensus to the butchering of good bikes in the Euro twin shock class? Is this any different just because it is a lowly 125?
I think ole mate has said he only has a CR roller so hes not butchering a good bike , The euro twin shock class is a bit different as they are to all intents and purposes reversing history or de engineering a product to race against earlier bikes ::)
I think the first post was asking if it would be a good idea to mate a CR roller with an XR200 with the aim to VMX it. The obvious answer is no. It would be slower under all MX conditions.
Agreed but i think it would make a cool trail bike and certinaly a talking point :)
http://i252.photobucket.com/albums/hh23/mcphotonut/200right03.jpg
Cheers, Grahame
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I can appreciate the workmanship and time that goes into some of these hybrid bike builds. It shows how clever and skilful the builder is. I just doubt that it is ever worth the effort if your main aim is to make the bike faster. Different, sure.
Yeah normally I like a good hybrid but the idea is to build a better mousetrap not a worse one, why not sell the XR200 and find a motor for the CR125 and enjoy those 34 hp. Back in the day we had this kind of argument 2 stroke versus 4 stroke and my RM125X shut down a mates XR200 on even the worst snottiest hills.
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I can appreciate the workmanship and time that goes into some of these hybrid bike builds. It shows how clever and skilful the builder is. I just doubt that it is ever worth the effort if your main aim is to make the bike faster. Different, sure.
Yeah normally I like a good hybrid but the idea is to build a better mousetrap not a worse one, why not sell the XR200 and find a motor for the CR125 and enjoy those 34 hp. Back in the day we had this kind of argument 2 stroke versus 4 stroke and my RM125X shut down a mates XR200 on even the worst snottiest hills.
The reality is 90% of people talks up horsepower when 90% of that 90% only use 50% of the power available anyway ::) Particularly on 125s how many wobblers do you see pissing around trying to race 125s ??? When somone can ride a 125 to its full potentiol its impressive but very few do ;)
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When somone can ride a 125 to its full potentiol its impressive but very few do ;)
Too true it used to be interesting at MXdN when the 125s were raced against the 500s all with top riders on them, the outcome was never entirely in favour of who had the most horsepower.
Had a ride on current model 144 Husky the other day..... fast as fark and felt like BMX bike
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Remember watching Johnny O'Mara on a 125 pass Dave Thorpe (I think) on a 500 on an uphill straight? ;)
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Here's a kiwi xr200 frankenstein bike in a 1981 rm125x frame
To me this is the ultimate sin destroying one of the all time legendary bikes- but each to their own....
http://www.trademe.co.nz/motors/motorbikes/motorbikes/dirt-bikes/auction-552926095.htm
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OK time for my 2 cents, if you had any other early 80's 125 I would say get an engine for it and restore to race but because its a HONDA with the well known magnesium achilles heal clutch/waterpump cover, chuck the 200 in, add some lights and vinduro it.
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Hi i have a 1983 yz 125 with xl185 motor in it .Most fun bike i have ride.Got a gold medal at harrow vinduro on it last year an i weigh 115kg.But if you dont do it i would be interested in purchasing bikes if that would be posibly .Check out hybreds and roaches on this forum.I also have same motor in 1983 xr 250 frame due to original havin head problems,Bit of fiddlin but both good fun to ride .. Cheers GREG
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Remember watching Johnny O'Mara on a 125 pass Dave Thorpe (I think) on a 500 on an uphill straight? ;)
Tony..1986 MXDN, At about 9 minutes into vid shows O'Mara on the 125 hunting Thorpe on the 500 and eventually passing. O'Mara second beaten only by David Bailey who was also on a 500 ;)
http://www.youtube.com/watch?v=CSeAP3OGSEI (http://www.youtube.com/watch?v=CSeAP3OGSEI)
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XR 200’s are great little bikes that shouldn’t be under estimated.
Because they are underpowered they are fun to push hard but they are no match for 2 stroke horsepower.
I raced an XR 200 in a natural terrain MX in the mid nineties on a wet track. In practice I was hounding a lot of the young guys in the corners, I think some were about ready to retire from MX when they realised an old fat bloke on an XR was rounding them up.
But the track dried up and there was no way the little XR could keep up on the straights when the 2 stokes could get the power to the ground.
Depending how it is put together it should make a fun little bike that will be good in Vinduro’s but you will be wasting your efforts if you think it will be any good on a serious MX track.
Much easier and less effort to just sell the parts you have and just buy an XR200.
83 on they had good suspension for a trail bike.
The CR frame may make it a taller bike and take away the advantage in the corners
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Remember watching Johnny O'Mara on a 125 pass Dave Thorpe (I think) on a 500 on an uphill straight? ;)
Tony..1986 MXDN, At about 9 minutes into vid shows O'Mara on the 125 hunting Thorpe on the 500 and eventually passing. O'Mara second beaten only by David Bailey who was also on a 500 ;)
http://www.youtube.com/watch?v=CSeAP3OGSEI (http://www.youtube.com/watch?v=CSeAP3OGSEI)
With Dacka coming in fourth behind Thorpe.
Caught a glimpse of a real Malboro Yamaha as well :)
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An 84 CR125 would have about 32hp. An XR200 has 18hp. It weighs more and the weight is higher up. It would use less fuel and have a less vulnerable exhaust. If anyone can ride a hybrid like this very fast it is because he/she is a very fast rider, not because the bike gets faster with about half the horsepower.
How much and where is the torque in the comparo. I bet the XR has more in a sweeter spot and therefore there might not be much between them on the track.
My only miss giving would be the XR is very prone to wear as mine shits its self too regularly-shit it's fun to ride though :D
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if its your dream just do it ,you have the two bikes