Your screen name may be a results forecast of an attempt to hotrod the R65 engine. Many have tried.
The organ transplant would have better odds of achieving a moderately reliable scooter. Remember that the R65 has BMW's short wheelbase chassis so engine/trans combos could be an issue.
Welcome to all things R65, Mr Grime. Several members have outstanding cafe-style bikes. They'll chime in soon and likely post up pics.
Monte