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Hi.
I had a DR750 powered WASP outfit a few years ago,which i bought as a non-runner.When i stripped the motor,there were lots of nasty lookig metal bits in the bottom,and the oil pump drive gear had shattered.On full insteption the cause of all the trouble was found to be the starter reduction gear had broken up and bits had found their way in between the drive teeth of the oil pump,causing it to break up aswell(hence no oil pressure).Now there's no oil pressure warning device on the DR750,so the owner had just carried on oblivious until the damage had already been done.The oil starvation damage was limited to the head really,in particular where the camshaft runs in the alloy head bearing journals,which had got a bit chewed up.Anyway,i found a guy in Norfolk who races the Tigcraft singles,powered by DR800 motors who had loads of knowlage and more importantly spares for the 750.He said this was a well known fault with the 750 as the starter gears were one-piece cast iron and just could'nt take the beating of turning over thet huge piston! The remedy arrived as a complete 800 starter gear set,starter,starter gear casing,and a 750 cam to replect the chewed one.The 800 starter gear is made up of several thin hardened plates riveted together which will never break he said.After the rebuild everything ran as if it had come from the factory,and i used it for 2 years in classic trials before selling it.As far as i know it's still going strong now.
So the answer is,if you're planning to go RTW i would reccomend this as a precaution first.The only other comment i'll make about it is that it had a very healthy appetite for back tyres! The most i ever got out of one was 900 miles (nine-hundred) though this may have been due to the sidecar.
That's my tu'pennyworth if it can be of any use.
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Just going for a short ride on my bike....
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