It's on cables :s Over my life (on cars) I have had snapped clutch cables, snapped handbrake cables (on front wheeled handbrake cars and rear wheeled handbrake cars); snapped speedo drive cables on motorbikes and cars; and of course snapped brake cables on pushbikes. A cable is probably the most unreliable part on a vehicle as it fails. I wish they did not use cables; and used cams (or some other system). Bike wise I have had KMX 125; KMX 200; for two strokes (and KLR 652, KLR 250 and BMW GS Dakaar for 4 strokes). I was thinking of getting a DTR 125. Now I am not so keen with cables.The KMX powervalves never let me down.
@@charliesheensapprentice855 on the 88 to 97 dtr the powervalve didn't move it was pegged in one place, then on 1997 upto 2007 they fitted a servo motor and a spinning powervalve
It lowers the exhaust port during low rpm's in order to get a better low and mid end, this however enables you to run a higher revving pipe and larger ports whitout having to loose comfortable riding in the city and so on. :)
![Yamaha Power Valve: Alligned to Hole or to Exhaust Port? [YPVS DT 125 RE/X]](http://i.ytimg.com/vi/obMy0adby8Y/mqdefault.jpg)
![Yamaha Power Valve: Alligned to Hole or to Exhaust Port? [YPVS DT 125 RE/X]](/img/tr.png)
It's on cables :s
Over my life (on cars) I have had snapped clutch cables, snapped handbrake cables (on front wheeled handbrake cars and rear wheeled handbrake cars); snapped speedo drive cables on motorbikes and cars; and of course snapped brake cables on pushbikes. A cable is probably the most unreliable part on a vehicle as it fails.
I wish they did not use cables; and used cams (or some other system).
Bike wise I have had KMX 125; KMX 200; for two strokes (and KLR 652, KLR 250 and BMW GS Dakaar for 4 strokes).
I was thinking of getting a DTR 125. Now I am not so keen with cables.The KMX powervalves never let me down.
Intentionally Blank i have a dtr 125 and their is no cables on mine its definitely a dtr but i dont no why their is no cables
Carnt be a DTR than pal as after cable power valv from 89to05 than thay went electronic power valves
@@charliesheensapprentice855 on the 88 to 97 dtr the powervalve didn't move it was pegged in one place, then on 1997 upto 2007 they fitted a servo motor and a spinning powervalve
Good???
on my 2000 dtr 125r these are plugged off
I still don't understand exactly what the YPVS is doing. How is it creating more power?
It lowers the exhaust port during low rpm's in order to get a better low and mid end, this however enables you to run a higher revving pipe and larger ports whitout having to loose comfortable riding in the city and so on. :)
There are a pair of smaller exhaust ports that gradually open as the rpm's increase,, so it's like having porting work done