Wish I had more to report, its been yonks since I took my engine and box to the engineers to have them grafted together and he's been that busy he's done almost nowt on my project . I called in last week and he had skimmed the flywheel to take my bmw clutch but now the starter won't fit upto the ring gear on the flywheel , so I'll have to have a new ring gear made, ho humm. Started to strip the ural outfit yesterday and will deliver the bike this week and hopefully we can have the engine an box fitted, I hope to have some pictures too.
Go on, kickstart it...it's fine when you get used to it, and since you'll never stall in traffic (mine didn't, even when the nipple came off the end of the clutch cable and away we went) you'll not need an electric start to save your blushes at traffic lights...
Hi mate, which clutch are you using? BMW have a heavy (early) and a light (later) clutch. Ive mated a heavy one to my kubota d950 and found that the flywheel is only just heavy enough, I would think it would stall when coming off the throttle with a lighter clutch.
mark_in_manchester wrote:Go on, kickstart it...it's fine when you get used to it, and since you'll never stall in traffic (mine didn't, even when the nipple came off the end of the clutch cable and away we went) you'll not need an electric start to save your blushes at traffic lights...
M.
Hi mark, I would have if I could have got hold of BMW box with a kick starter , they are like rockin horse shite (don't tell me you've got one ) it would have worked out loads cheaper too, and no wiring etc etc.
OilyPhil wrote:Hi mate, which clutch are you using? BMW have a heavy (early) and a light (later) clutch. Ive mated a heavy one to my kubota d950 and found that the flywheel is only just heavy enough, I would think it would stall when coming off the throttle with a lighter clutch.
Phil
Hi phil, I am using the daihatsu flywheel machined to take a BMW early (heavy) clutch. The flywheel is quite alump of metal so I hope they are gunna work well togerther, am having trouble holding tools and keeping my fingers crossed
I used a Ural flywheel and clutch, which is about 30% lighter than Daihatsu one (I've not attempted to calculate relative moments of inertia based on integrating the mass over the radius, though I did think of using my lathe as a brake and timing how long they both took to slow down on a faceplate when I turned the motor off) - engine ticks over fine even when very cold, and won't stall. I think you'll be fine. If you're suggesting that someone has buggered up your Daihatsu flywheel (starter ring problem etc) and you think that it would be possible to install the BMW clutch you have into said flywheel and avoid this problem, if the job had been approached in a different way, then I may still have a D. flywheel which I didn't use - I can't remember if I weighed it in or not.
Hi all, got a bit done on my outfit so, hopefully some pictures. The engines laid on its front but thats not how it will be in the bike That gearbox does look big but its a bmw R65.
mark_in_manchester wrote:I used a Ural flywheel and clutch, which is about 30% lighter than Daihatsu one (I've not attempted to calculate relative moments of inertia based on integrating the mass over the radius, though I did think of using my lathe as a brake and timing how long they both took to slow down on a faceplate when I turned the motor off) - engine ticks over fine even when very cold, and won't stall. I think you'll be fine. If you're suggesting that someone has buggered up your Daihatsu flywheel (starter ring problem etc) and you think that it would be possible to install the BMW clutch you have into said flywheel and avoid this problem, if the job had been approached in a different way, then I may still have a D. flywheel which I didn't use - I can't remember if I weighed it in or not.
cheers
Mark
Hi Mark, flywheel is machined and clutch is mounted, and the way the engine and box fit together there may be no need to make another ring gear. In its original position the starter was in the side of the daihatsu bell house, but it should sit central above the bmw gearbox and mesh onto the ring gear to start the beast.
Great - you've done the difficult bit, all the rest is conflakes box templates and birdsh*t welding (in my own experience )
I bought a small benchtop reciprocating hacksaw 2nd hand from ebay, which sure made all the cutting less of a pain in the neck.
Keep us posted
cheers
Mark
. I called in last week and he had skimmed the flywheel to take my bmw clutch 
but now the starter won't fit upto the ring gear on the flywheel 
, so I'll have to have a new ring gear made, ho humm. Started to strip the ural outfit yesterday and will deliver the bike this week and hopefully we can have the engine an box fitted, I hope to have some pictures too. 
) it would have worked out loads cheaper too, and no wiring etc etc. 
