The Yamaha R1 powered Freestyle - UNDER DEVELOPMENT

Yamaha YZF-R1 - 998cc. 150bhp. 80lb.ft. 60Kg.

Good power and torque from an engine with the physical size and weight of a 900. The stacked gearbox puts the sprocket where you need it for good prop angles and the gear selector up high at the back of the engine for a very positive and direct gear linkage routing.

All experience so far has indicated that sump modification is not necessary in a bec and that over filling is sufficient.
Sidecar racers use a baffled sump.

Has a cable clutch and dinky liquid-cooled oil-cooler built onto sump like the blade.

Has good gearing and a useful 11,750rpm redline. Ditching the EXUP valve can cause problems unless the servo is retained in the loom or a black box is used to spoof the ECU.

Seems to respond well to the usual BEC trick of junking the airbox and re-jetting with power IRO 160bhp.

Certainly bikes with full exhaust systems, K&N filters and jets are producing this much.

Early engines were subject to a recall for the clutch basket and the top hose which could come adrift.

The one big downside of this engine is that they are all post 98 and thus fall under cat level emissions at SVA.

Not used by any mainstream manufacturer and as such prices are not silly.

I've seen them from under £1K with brand new engines available for £1750.