The rebuilt engine is a 900cc Yamaha TDM with a realigned output shaft for matching the chain and sprockets correctly with the YZF rear hub. An 850 TDM head allows the use of the 850 carbs and made mounting the engine easier as it uses the same front mounts as the TRX. The bottom end was also converted to use an 850 dry-sump oil tank slightly modified to fit the 900 cases.
"The bike handles very well and everything works like it should. The 900 engine is newer than the TRX and is a big improvement over the original 850 lump. The 6 speed gear box provides lighter gearshifts, it has a better clutch and loads more low down torque. There's no oil consumption due to the Nikasil cylinders and it is faster and much lighter than the TRX or the TDM ever were."
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