Author Topic: when is a RD250 twin a RD125 single  (Read 303 times)

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Offline RDJames

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when is a RD250 twin a RD125 single
« on: September 21, 2018, 10:31:50 AM »
Well they say never buy a bike without seeing it and trying it 1st.,

Doesn't always apply to me as I break them for parts.But this one did amuse me.
Got it from a chap in Germany without seeing it (payed good money)  :(

When it turned up looked ok but not as good as the pics, kicked over with some compression but a bit odd, anyway time to take it apart.

SHIT....... one conrod one piston and one carb blocked off it was ridden with just the one piston. ::)

 you win some you lose some..but you can have a hell of a laugh along the way.


RDJames on Ebay

http://stores.ebay.co.uk/rdjames

Never take life too seriously, no one gets out alive anyway

Offline paul n

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Re: when is a RD250 twin a RD125 single
« Reply #1 on: September 21, 2018, 10:41:21 AM »
Perhaps it was a weight reducing exercise.  :-\ 
No garage is large enough!
Nottingham

Offline tony2stroke

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Re: when is a RD250 twin a RD125 single
« Reply #2 on: September 21, 2018, 11:19:27 AM »
You have to wonder how it performed, also how did any lube get to that blocked cylinder and crank bearings, I have heard of this being done before, someone mentioned it a year ago or so on here somewhere, wonder if its the same bike.

Its pure needs must I would think, pure desperation and need to keep bike on the road, we all did some crazy stuff back in the day when young and stupid through lack of money though didn't we, or is that just me. no wait it can't be just me, this bike proves that.

I stitched a tyre that split on a vespa with fishing line  :D  the tube kept trying to pop through the gaps in the stitching, it was in the side wall too, I think back sometimes and wonder how I am still alive, tying not's in cables where the nipples snapped off ( brakes and throttles) stitching tyres, lost some individual bearings from steering. no worries as long as there is enough to go more than half way around, I turned a piston around that had broken (RD125A) hard to start but once it did man it was quick, didn't think it would work "but it did" whatever needed to keep riding, safety and any thought for the bikes were just not given any consideration.
« Last Edit: September 21, 2018, 11:22:49 AM by tony2stroke »

Offline Ozhammer

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Re: when is a RD250 twin a RD125 single
« Reply #3 on: September 21, 2018, 11:46:03 AM »
I know the Germans are eco-bonkers but that’s a bit of a dramatic way to reduce your emissions! :o
2 strokes are all I need!

'74 S3
'75 CB400-4
'78 RD250E
'78 RD400E
'79 RD400F
'79 RD400G
'81 GT250EX X7
'81 RD350LC
‘83 KE175D3
'86 RD350F2

Offline shaunthe2nd

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Re: when is a RD250 twin a RD125 single
« Reply #4 on: September 21, 2018, 01:19:26 PM »
Most of the German 2 -strokes were restricted! Lol
RD350LC - RD250LC - RD200DX

Offline betty foRD

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Re: when is a RD250 twin a RD125 single
« Reply #5 on: September 21, 2018, 03:28:04 PM »
You were allowed to do that and it classified as a 125cc conversion when the learner laws changed.
Normally just fill the dummy side half full of oil.

I also have a good working one on the shelf, it’s my old Dyno engine from the ‘80s..but built with a bob weight to balance missing rod.
« Last Edit: September 21, 2018, 03:32:02 PM by betty foRD »
Rev 'em till they rattle

Offline 5port

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Re: when is a RD250 twin a RD125 single
« Reply #6 on: September 21, 2018, 07:40:43 PM »
Yes, mate found a 350/250 combo (that worked well!) and, another European race bike 175cc that was a 350 with one cylinder and a plate over over the other hole .   :'(

5port
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Offline kawazonkey

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Re: when is a RD250 twin a RD125 single
« Reply #7 on: September 21, 2018, 09:31:14 PM »
I know someone who did that to a 250 Super (wet) Dream back then. Life expectancy was about a month, it lasted 2 weeks and went BANG! This is the same chap who fitted a Sidewinder to a 250LC... :D