For those of you who like to see what can be built;
http://www.ebay.co.uk/itm/FARNSLEY-WAZZOCK-HEAVY-OIL-THUNDERBLAST-MKI-DIESEL-POWERED-VELOCIPEDE-PROJECT/201285397108?_trksid=p2045573.c100033.m2042&_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=29117&meid=914f8888a3c34845a7b8463238cb90e6&pid=100033&rk=4&rkt=4&mehot=pp&sd=191514876664
(see the Q&A at the end).
Also for those who ask about alternative bikes (not cycles)
http://www.dieselbike.net/Rally-Info/rally.htm
http://www.ebay.co.uk/itm/FARNSLEY-WAZZOCK-HEAVY-OIL-THUNDERBLAST-MKI-DIESEL-POWERED-VELOCIPEDE-PROJECT/201285397108?_trksid=p2045573.c100033.m2042&_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=29117&meid=914f8888a3c34845a7b8463238cb90e6&pid=100033&rk=4&rkt=4&mehot=pp&sd=191514876664
(see the Q&A at the end).
Also for those who ask about alternative bikes (not cycles)
http://www.dieselbike.net/Rally-Info/rally.htm