Author Topic: YZV250 'SuperBiker'  (Read 893 times)

James P

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YZV250 'SuperBiker'
« on: December 23, 2018, 04:49:13 AM »
I found this in a 2016 Bikers Station magazine recently (two-page spread, so scroll across if it doesn't all fit on the screen!):




This bike was originally featured in the Bikers Station December 1994 issue, so some of you may have seen it before. You also may recognise the man the photo as Tadao Suzuki; former Japanese motocross champion and owner of SP Tadao (https://ja.wikipedia.org/wiki/%E9%88%B4%E6%9C%A8%E5%BF%A0%E7%94%B7).
The bike was built in 1994 for the SuperBikers competion, based on the American ABC Television sponsored series which started in 1979 and which seemingly gave birth to the SuperMotard phenomenon. I'm not sure of the extent to which this sort of racing was run in Japan, but I did find this Japanese Wikipedia page (https://ja.wikipedia.org/wiki/%E3%82%B9%E3%83%BC%E3%83%91%E3%83%BC%E3%83%A2%E3%82%BF%E3%83%BC%E3%83%89) which gives a brief outline.

The chassis is 1991 YZ250 with smaller diameter wheels and modified suspension, with the aim of improving the handling on the paved section of the SuperBikers track. You will also notice that the chassis has been modified to accept a TZR250 3XV motor. The crankcase is 1991 TZR250R, fitted with a hybrid TZ/TZR crankshaft, a hybrid TZ/TZR gearbox, a TZR-RSP dry clutch, 1994 TZ125 cylinders and 1994 TZ250 pistons and cylinder heads. The carbs are TM36SS, which I presume are TZR-RSP. The expansion chambers are of course from SP Tadao.

The complete bike weighed 120kg (complete, but without fuel), this comprising 59kg at the front and 61kg at the rear. Castor angle is 24 degrees, wheelbase 1420mm.

I'm not sure what happened to this bike (a brief internet search didn't reveal any info or photos), but I thought it may be of interest for those who haven't seen it before.
Incidentally, the 2016 Bikers Station magazine these photos came from was part of a series of issues showcasing Japanese 250cc two-strokes:

No.348 - September 2016 - Yamaha
No.350 - November 2016 - Honda
No.352 - January 2017 - Suzuki and Kawasaki




The Yamaha issue is particularly interesting, running for 47 pages and featuring a variety of road and off-road 250cc models, as well as factory racers and production racers. Well worth a look if you can get hold of a copy.


Regards,
James

Warwick

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Re: YZV250 'SuperBiker'
« Reply #1 on: December 23, 2018, 02:21:47 PM »
That YZV is fantastically bonkers! Looks like the rad took a bit of a beating from the front wheel, and I imagine the dry clutch took some grief from mud and debris too, but I'd have loved to have a go on it!  8) 8)

Gonna shuffle it into the gallery later though as it'll be more at home and get a broader audience there I think  (-P).
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ybk

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Re: YZV250 'SuperBiker'
« Reply #2 on: December 23, 2018, 09:56:52 PM »
Haha this awesome! It probably puts out 70+ hp!? On that gearing it must be quite a ride :o Can't imagine the front wheel gets much road time ;D

I like how they kept the stock airbox on the lower carb.

Would be interesting to know where the bike is now if it survived...
« Last Edit: December 23, 2018, 09:59:13 PM by ybk »

thump566

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Re: YZV250 'SuperBiker'
« Reply #3 on: December 24, 2018, 09:25:02 AM »
Always in awe of bikes people that build something different that works  (-P)

Never seen this one before and wonder if this might have spawned an idea with Aprilia for their more recent SXV 450 and 550 v-twins :-\
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Hoatso

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Re: YZV250 'SuperBiker'
« Reply #4 on: December 27, 2018, 02:31:01 PM »
Here is a video of one of the Superbike races. Not sure what year.

https://youtu.be/APEdTAQE3EA

thump566

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Re: YZV250 'SuperBiker'
« Reply #5 on: December 27, 2018, 07:54:22 PM »
Awesome  (-P)
Been to a couple of supermoto race events in the UK years ago when they were in their infancy, similar format and amazing to see them 'backing it in' on the tarmac section with both wheels drifting.  :o
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SeaR1ck

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Re: YZV250 'SuperBiker'
« Reply #6 on: December 27, 2018, 08:19:47 PM »
That video is from the ABC super bikers series from the early 80's. Broc glover and Ricky Johnson were in that video looks like 84. I think the series ran from like 81 till 85. Was a made up series which many years later after it died off was credited for the birth of super moto.

They had a round one time in like 2009 at this local county fair. One of the AMA national rounds they used the car circle track and the infield were some mx sections. Was cool to watch but crowd turn out was poor and they never came back. But shortly afterwards supermoto really dropped off on popularity it was huge in the early 2000's.