yeah 5.4hp out of a 33cc is quite a lot of stress and would make it one of the highest specific power output engines in the world at 122Kw per litre!!<div>
</div><div>That would place it in Honda NSR 250 R territory in full race tune on a pipe..........highly unlikely indeed</div><div>
</div><div>i vote for the misprint where 4.5bhp seems more reasonable</div>