So what is involved in fixing a Zane 750 with crank failure?

Sporteous said:
I wonder if a Yamaha TRX850 engine would fit?
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Looking at dimensions, I think the top of the Trixie motor would be too far forward, and don't forget the big radiator that has to go in front of the motor. But a hotrodded XS650 motor would probably work, especially if you bored it to 850 and twisted the crank to around 270. Chain alignment would be easier too, TRX front sprocket is aligned to a much wider rear subframe/swingarm than existed on any bike in the 70s.

Ken
 
The photos I have seen showed a Commando engine in the trellis frame.
 

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During my time at OCT we have done about 10-12 complete engine rebuilds, another 18-20 cranks and perhaps a dozen heads and balance shafts.  To my knowledge, none of the OCT-built engines have had any further issues apart from normal consumables and servicing work being necessary.  Of course, we don't have influence on the quality of the DIY builds for which we only do some of the components, I know of 2 engines that suffered major knackering almost immediately after being assembled by the customer... :D 

There's not many really good bikes about, even less that come up for sale.  Please don't believe any crap stories, always insist on seeing an invoice to prove any far-fetched claims.  These repairs are not cheap, I seriously doubt that anybody having this type of work done doesn't keep the bills to prove it.

I honestly don't like the things, but I must admit it is rather rewarding hearing a former can of nails sounding like a half-decent engine again.  Actually mechanically surprisingly quiet once everything is sorted.

piet
 
My engine was done by OCT before I bought the bike. Runs sweet and faultless ever since, but has only done 3.500Km or so since I bought it. Loved every kilometer of it though...  ;)
 
I know I am in a minority here but I havent had any issues with my Zane bikes.  My experience has been that a few small upgrades such as a stainless oil filter, upgraded battery cables, the sidestand bypass and the voltage regulator fix leaves you with a very usable bike.  Now I will admit that I am not flogging the hell out of my bikes or racing them on the track but none of my bikes seem to be having crank issues. 

The later edition 668 engines in particular seem to be quite strong.  Perhaps this is due to their not having the loads placed on them that the 750 did, I dont know.

Anyway, just thought I would offer a bit of defence for the zane lineup.

Marty/Dallaslavowner
 
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