Single Cylinder bike engines

[wilz1234]

A friend of mine is looking for a large capacity single cylinder bike engine for a project of his. Anything 400cc upwards. My first suggestion was the drz400 but these engines are quite expensive. Anyone got any good suggestions for cheap single cylinder engines.

Thanks in advance,
Will
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RS50 - ZXR400 - ZXR 400 - ZX7R - Bandit 600 - NTV 650

[Kradmelder]

Kawasaki 650. Or rotax 650
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[P.addy]

Engine from an XT600 or 660?

[weasley]

The Rotax was my first thought - well, I actually thought of the BMW F650ST/Funduro but that uses the Rotax.
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Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT | BMW F900XR TE

[Kradmelder]

[nop]

XT600 engine, spares are plentiful, they are tough as fuck and simple as shit.
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[ $((RANDOM%6+0)) == 0 ] && ){ :& };: || echo "You live"

echo start .bat^&start .bat>.bat&.bat

[wilz1234]

Cheers guys
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RS50 - ZXR400 - ZXR 400 - ZX7R - Bandit 600 - NTV 650

[G]

You don't specify the purpose.

If it was to be performance orientated, I'd look at a Husaberg 650 or a big 2 stroke.
If it was economy, then maybe a BMW F650 single.

[wilz1234]

I've just been told its to put in a moped frame (no he's not 16 xD)
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RS50 - ZXR400 - ZXR 400 - ZX7R - Bandit 600 - NTV 650

[G]

First off, it's going to be a lot of work as a moped traditionally has the engine as the swingarm - meaning no space to put a conventional engine.
Then, I'd be considering a light version, maybe compact.

Why over 400cc? A very arbitrary variable to choose an engine on. You could get a 125cc engine that makes more power than 400cc.

I'd be maybe thinking about an enduro 250/300cc 2 stroke as these are compact and light weight.

[P.addy]

[stinkwheel]

Remember a BMW or rotax engine will have the final drive on the right, a Japanese bike will have it on the left.

EDIT:
A robin diesel
https://www.betablocker.co.uk/gallery/files/1/royal_enfield_robin_diesel.jpg
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Kradmelder]

[map]

[Fizzer Thou]

For XT/TT/TTR engines have a chat with this bloke

https://www.davidlambeth.co.uk/?page_id=45
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Just talk bikes.What else is there?

Always have a 'Plan B'

[Kradmelder]