Exactweld TZ250
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Re: Exactweld TZ250
I remember one being raced in various 250cc club championships in 1994/1995. It was a scruffy, run of the mill looking bike, but it transformed into something really interesting once the bodywork was off.
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Re: Exactweld TZ250
It's their own engine. A twin tandem disc with 4 carbs. Rear end bolts to the crankcase and front on the cylinder head.
Have you spotted the rear brake system ?
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Re: Exactweld TZ250
Cathcart always did write the best stuff for PB years ago and that article being one of his just confirms it.
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Re: Exactweld TZ250
Me, thinking on the top of my head and don't know shite.....would assume that a single/ parallel transfers are not restricted by the confines of having to squeeze cylinders together. Is a guess. I shall get that question off to the Boys that designed it.inewham wrote: ↑Sat Dec 26, 2020 1:42 pm Can someone tell me the advantages of a tandem twin over a more conventional parallel twin?
You can use disc valves on a parallel twin and surely there must be losses gearing the 2 cranks together.
They seemed popular for a while in the 80s but ultimately V-Twins seemed to work better
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Re: Exactweld TZ250
It'd be narrower, and with with small capacity water cooled cylinders there'd be no extra cooling problem nor would the motor be too long.
The crankshafts would turn in opposite directions too, that might be an advantage.
That's my guesses anyway.
The crankshafts would turn in opposite directions too, that might be an advantage.
That's my guesses anyway.