Yamaha TRX850 Enthusiasts Forum

I recall someone had some specifications on camshafts, but I can't find it anymore. So, what are the standard cams specs? I know the Kent cams (and they don't look so much hotter compared to the standard cams.) Anyone who knows the V2 or the Tornado cams' specs?

Hi Hans!

I think this man could tell you the specs of the V2.. "Ulf Penner"
http://www.tuning-fibel.de/motorrad_tun ... ha-trx.php

Ciao!

Heinz

HansJ wrote:I recall someone had some specifications on camshafts, but I can't find it anymore. So, what are the standard cams specs? I know the Kent cams (and they don't look so much hotter compared to the standard cams.) Anyone who knows the V2 or the Tornado cams' specs?

I think i got the V2 specs on my laptop...but i´m home from work with a high fever, if you don´t get them before i´ll get them to ya when well again.
.....but i thought they´ve stopped produce the V2 cam!?

I just thought it would be nice to have the specs put together somewhere, knowing V2 is out of TRX cams, and who knows how long Kent and Tornado will continue. It would also be interesting to see the specs in comparion to the standard cam, something I've looked for in the Ymaha's manual, but failed to find.

HansJ wrote:I just thought it would be nice to have the specs put together somewhere, knowing V2 is out of TRX cams, and who knows how long Kent and Tornado will continue. It would also be interesting to see the specs in comparion to the standard cam, something I've looked for in the Ymaha's manual, but failed to find.

Here you have the Megacycle specs for now, will look up the V2 ones:

And here are the V2 specs:

HansJ wrote:I just thought it would be nice to have the specs put together somewhere, knowing V2 is out of TRX cams, and who knows how long Kent and Tornado will continue. It would also be interesting to see the specs in comparion to the standard cam, something I've looked for in the Ymaha's manual, but failed to find.

I'm sure someone posted the standard spec on the old forum once.

Not sure how valid these figures are, but that's what I found on the old site (thanks Citroen54 and Ike849!). The figures for the std seems to be the most uncertain ones, as it's not clear what lift the official figures have...

(phew, felt like sneaking in to the redlight district, spammers everywhere...)

MegaCycle (need to mod pistons, 1mm lift)
IN Open/Close - 25 btc/52 abc
EX Open/Close - 60 bbc/24 atc
IN Lift - 8.51mm
EX Lift - 8.51mm
IN Lobe Centre - 103.5 degrees
EX Lobe Centre - 108.0 degrees

V2
IN Open/Close - ?? btc/?? abc
EX Open/Close - ?? bbc/?? atc
IN Lift - ??mm
EX Lift - ??mm
IN Lobe Centre - 104.0 degrees
EX Lobe Centre - 108.5 degrees

Kent (Thanks Rick)
IN Open/Close - 15 btc/45 abc
EX Open/Close - 49 bbc/11 atc
IN Lift - 8.43mm
EX Lift - 8.43mm
IN Lobe Centre - 105.0 degrees
EX Lobe Centre - 109.0 degrees

TRX850/TDM850 (Stock cam clearance??) (Thanks allan/earywig)
IN Open/Close - 29 btc/59 abc
EX Open/Close - 59 bbc/29 atc
IN Lift - 7.90mm - 8.10mm
EX Lift - 7.90mm - 8.10mm
IN Lobe Centre - 105.0 degrees
EX Lobe Centre - 109.0 degrees

TDM900 (Stock cam clearance??) (Thanks allan)
IN Open/Close - 30 btc/50 abc
EX Open/Close - 50 bbc/30 atc
IN Lift - ??mm
EX Lift - ??mm
IN Lobe Centre - ?? degrees
EX Lobe Centre - ?? degrees

TRX850/TDM850/XTZ750 (1mm lift) (According to Megacycle)
IN Open/Close - 10 btc/39.5 abc
EX Open/Close - 44 bbc/14 atc
IN Lift - 7.75mm
EX Lift - 8.00mm
IN Lobe Centre - 105.0 degrees (104.75????)
EX Lobe Centre - 109.0 degrees (105.00????)