Yamaha TRX850 Enthusiasts Forum

Was trawling through some of my older stuff and thought some newbys might be interested in this.

http://sites.google.com/site/kimpartridge/trxwiththelot

Kim

Thanks Kim

I think having the facts in black and white will help dispell a number of myths about the Over bike:

1 - it wasn't that powerful. 115 ps (or 113bhp) at the gearbox equates to (being generous) no more than 105 at the wheel.

2 - the 6 speed box wasn't a drop in YZF item

3 - it wasn't that light. 165kg dry is probably nearer 180kg ready to go (factoring in 10l fuel, 4l oil and 1.5 coolant)

It was still a thing of beauty though and perhaps the 2nd most ridiculous project embraked on by Over (google the Over MT01 if you want to see teh first!)

kim wrote:Was trawling through some of my older stuff and thought some newbys might be interested in this.

http://sites.google.com/site/kimpartridge/trxwiththelot

Kim

Hi there Kim, good to hear from you.

Interesting read from the past Kim - thank you. Although the writer needs a lesson in how the mechanics of geometry & suspension work as there are a few contradictional (un)facts in there.

This is an article of the BOTT Over TRX in Kickxstart(dutch). Thanks too SpondonTrx

http://www.blue-company.info/trx_tuning/BottTRX.pdf

Just out of interest for our overseas members
http://www.halfofmylife.com/2011/07/27/rip-ken-wootton/
Possibly was one of the better motorcycle journo's here in Aust.

MANY thanks: very, very interesting. Printed and added to my collection. I'm just drilling the frame

taken from an old italian magazine. I think can be useful

http://www.tdmitalia.net/documenti/prove/tdm850.pdf

Hello,

Regarding the bigger valves on OVER bike - does anybody know, if they use valves especially made for this bike, or they used valves from another bike, that are similar ?

Also the camshaft with profile from racing TDM is mentioned - Is the KENT cam similar profile ?

Thank you,

The valves were specials Over had made I believe, there are no oversized, off the shelf valves available for the TRX that I know of tesa.
The Over camshaft profiles were also their own too I believe.
The kent cams are quite a reserved profile, the TRX could run more lift and duration but they are a good compromise from outright full race and street.
Both oversized valves and camshafts can be made for you, but they`ll be expensive, the cost is what puts most folk off.

Mincehead wrote:The valves were specials Over had made I believe, there are no oversized, off the shelf valves available for the TRX that I know of tesa.
The Over camshaft profiles were also their own too I believe.
The kent cams are quite a reserved profile, the TRX could run more lift and duration but they are a good compromise from outright full race and street.
Both oversized valves and camshafts can be made for you, but they`ll be expensive, the cost is what puts most folk off.

+1

Kent cams focus in midrange which is exactly what you want for a street bike (especially a twin).

V2 cams focused on top end gains (like over)

Good read.. Let's all become Swiss...