with more modern mass produced bikes i got to wonder whats the bike youve most enjoyed building or ridding? i used to race Lambretta's a few years back as well as ride em on the road for you americans a lambretta is a Classic Italian Motorscooter,,,, basically petrol driven sex on 10inch wheels. I used to race a 1969 Lambretta SX200 the modified engine spec read as follows; aluminium barrel bored out iron liner added then a ceramic coating added with extra boost and transfer ports machined in and original barrel induction port welded up. [original was cast iron with 2 small transfer ports] yamaha racing reed block welded onto the crankcase and fitted with modified boyeson reeds, Yamaha piston with original ports welded up and 3new ones machined in original crankcase web machined to accept a Rotax con rod , and yamaha big end and little end bearings Crankcase re-enforced with extensive aluminium welding to stop it from trying to twisting in half 34mm AMAL non power jet carb no air filter billet watercooled cylinder head, outboard water pump from a caravan [trailer] heavy flywheel machined down and a lightwieght fan from a washing machine[!!!] bolted on Electronic motoplat ignition One off expansion chamber with carbon fibre tail pipe The frame mods included; Fuel in frame tube. Electronic rev counter hydraulic disc and race seat See it here ; http://communities.msn.co.uk/JugglingMonkeys/dribblingoldmen.msnw?action=ShowPhoto&PhotoID=36 theres also a bunch of my drawings etc there,,,ignore em in original form it struggled to make 12bhp when i finished it made 41bhp i left it looking very 60's and original looking i loved the look of shock / horror / disgust as i left road bikes/ sports cars in a cloud of silkolene smoke i also fitted a 1959 lambretta TV175 with an original 'wal phillips fuel injector',,,,,that was in 1986 haha as a matter of interest what bhp does a new yz250 make?