Gday from Tasmania 

We're just getting into mower racing down here in Tassie, have been doing it for about 12 months so far. I run a Greenfield mower with a 26HP (44ci) Briggs Intek V'twin.

I have strengthened the original chassis, lowered it, widened it etc. It runs a clutched belt drive with a 3.5" front pulley to a right angle drive with a 7" pulley on it, so I get a 2:1 reduction to the right angle drive. Then it is sprocket driven to a kart rear end.

At the moment it performs pretty well, could be better but there's more stuff to do to the front end.

Engine is stock, it was running at 4500 on the governor. I've got a billet flywheel coming from the USA so I can remove the governor. Rods are next on the list or can stock rods do the job? I would like to get about 5500/6000rpm out of the engine.

What will I need to get for the heads? I've just got some new stock heads for it so I have a couple of bare canvasses to play with lol

Cheers,
Shane