Yamaha TRX850 Enthusiasts Forum

As we all seem to love dyno charts so much,I thought I'd post up the ones that came with the highly modified 1992 Tdm that I purchased in the spring of this year.

The specifcations that I can visually verify are 41 FCR's and Renegade 2 into 1 into 2 exhaust system and cans. The mods that I can't verify until I have it down are, (alledgedly) 878 big bore and Kent cams, the head may or may not be ported.

I've been riding it through the summer and it sure does pull like a train,it's a real hoot to ride Of note is the fact that it produces north of 60 ft-lbs of torque between 4500 and 7200. All this grunt at the bottom is, I believe, down (in part) to the architecture of the early 360 degree(two up) motor. Does anyone here favour this type of motor over our own 270 degree engines. Of course the Over Racing OV-15 raced with this motor as early as '92, claiming 110bhp at the gearbox sprocket.The 270 degree engine was a twinkle in the designers eye at that time.

I claim no credit for any of these modifications,they were all carried out many years ago by a guy named Trevor Leak.






Mark

Yep quite a few folk love the `grunt` of the early 360 TDM`s, they pull from nowhere, turbine like.

Those are bloody good figures for a 360 engine

It does feel very quick to ride,especially as it has ultra short gearing but may be nowhere near as much as the dyno chart would have us believe. I'd like to eventually cross reference those figures on dyno at Tagg Racing where my Trx was tested.


Mark.

Having ridden both 360 and 270 back to back I disagree with Mince - the stock 360 needs to be revved to get anywhere whereas the 270 pulls harder in mid range and continues til it runs out of puff around 8000