THROW YOUR POWERVALVE SERVO IN THE BIN (or disconnect it)
I just disconnected the servo on my bike and used the pullies to allign it to the hole and WOAH it makes so much difference its like riding a different bike.
The engine sounds much tinnier and makes very little power in the mid-range but as soon as you hit 8k you will FLY, i have a rear dep pipe and 1 out of 2 baffles in my front pipe and i do a consistant 70-75mph on a straight with wind now whereas before i would do from 60-70 and 75 down a hill before and it was very random. The bike also gets to 60mph SO much quicker its amazing, and in gear one the bike lifts the front wheel easily on acceleration. This has gotta be the most cost effective mod for those who want their bike to be more like a MX bike and less like a 4-stroke
i have 2002 dtr,were do i disconnect the servo? the holes are alined with the cables yer? so do i take the cables out? wat do i do to disconnect it pls
people say that without the servo it makes no diffrence in speed.it just shoots of after 8rpm.its started to make me wonder.....here,s why...the older dtr,s dont have all these new restrictions on them like the newer ones yer..so why don,t the old ones have servo,s on them like the new ones.does the servo make the bike not as quick as a pegged one/////
I unplugged the huge connecting block that is attatched to the servo. After riding like it for a while this is my opinion: Cruising is HORRIBLE like this, there is no comfortable rev to sit at. Acceleration is bestial Top speed is mostly the same (the engine can only turn so fast), it just gets there MUCH quicker When i watch my speedo it shoots from 30-40-50-60
There is loads more arm wrenching pull in the low gears. First ride after i got the idea to try dissabling my powervalve i was smilling the whole time!
Iv tried many times to allign the powervalve so it is ACTUALLY fully open when it should be but it never seems to work, i think it restricts the powervalve a little bit because i had difficulty getting past 10k rpm which i do easier now
i will give it a go mate at the weekend,let you know what i think...my opinion is i should of got an older dtr rather than my 2002 and put a servo on it as they are not restricted,they prob go like a yz with servo,s on them..
My bike allways revved over 8k, even when the speedo was restricted, it just revs more freely to 10k now, before with the servo the engine sounded like it was killing itself at 10k.
Obviously that excludes the last gear, that still struggles to rev out fully.
It is really simple to do.
(All can be done without removing a side pannel)
1. open the powervalve cover 2. turn the ignition on and off so the powervalve resets itself (not neccissary) 3. grab the plastic turning thing inside the powervalve cover that the pullies are attatched to, turn it so that it is alligned close to the hole (it may take some force to turn it) 4. pull up the plastic covers and adjust the pullies so they are nice and tight and aligned on the hole. 5. comming out of the servo is a single wire with a plastic connector and a big connector block with four or five wires going into and out of it, dissconect the big connector block. 6. (using tape) Wrap up the parts of the now separated connector block side by side to stop water getting in and to keep them in place. 7. start up the bike, if it worked it will sound much tinnier like a MX bike and you will hear no powervalve noise when you turn the key 8. ride out into your street, be like.. what the...my bike is ruined!.. then have your arms wrenched as you hit the power and the wheel skims the ground on a corner 9. have fun doing speed set-offs at the lights without pulling a wheelie, its really fun :D
I still need to verify if the bike is actually significantly faster like this, but i know that before i was never thrown back so much by the accel or skimming the wheel in the bottom gears. wheelies much easier too.
Done a full tank of crazed riding like this, got about 98 miles till i hit reserve compared with 105 miles with the servo..not that much difference
BEEN OUT AND TRIED IT, WITH THE SERVO WORKING THE BIKE FLY,S TO 50-60MPH ONCE IT GETS TO 8,000RPM THERE,S NO MORE POWER.......WITH THE SERVO DISCONNECTED IT WAS SLOW UP TO 7,000RPM BUT FROM THERE IT PULLED WELL UP TO 10,000RPM I CAN,T SAY IT LIFTED THE FRONT END.BUT THAT WILL BE THE STANDARD PIPES.I DID NOTICE THE ENGINE SPLUTTER. MY VERDICT IS.I PREFER TO HAVE SERVO WORKING.MY GUESS IS THAT WITH THE SERVO WORKING IT CAN,T BE TURNING THE VALVE AS FAR AS IT IS WHEN IT,S AT REST WHEN YOU TURN THE IGNITION ON
with the servo disconnected you make sure you stick in the 7k+ revs, else it will be slow, also have to slip the clutch on set-off and try not to pull a wheelie lol. I bust a fork seal from pulling too many wheelies....
does anyone here know what the powervalve is for?? disconnecting it makes things useless at low revs, the bike will not go any quicker with the powervalve pinned open it just feels like it does
have you earthed the wire from the 4 pin conn block? it makes a slight difference, the powervalve shoud open up fully at high revs meaning it should rev out to 12500 or so
thats on the newer dt's? iv disconnected the reedblock on my 2000 dtr and it doesn't do past 10.5k revs
Also
After riding around with the powervalve discconected i have had my rear lightbulb blow twice, i am not sure if it is a coincidence but i have reconnected the powervalve for now to see if it was the problem. After reconnecting the powervalve the bike feels restricted in the top end, even when i fine tune the powervalve, with the servo pinned and unplugged the bike shoots through from 7-10k and makes allot of power there, now it is much slower and makes less power through those revs, it is also much harder to wheelie now, dumping the clutch in first doesn't bring the wheel up nearly as much as it did when disconnected.
Powervalve unplugged: faster acceleration if you keep it in the powerband, pulls to 60 faster, pulls to 70 much faster, causes bulbs to blow out?? (not sure yet), takes about 10 miles off ur tank, makes the mid-range useless but makes the top end sound awesome. I also get more spluttering with it unplugged, with a little deceleration popping aswell (rejet needed?) Powervalve servo on and tuned: much more useable midrange power, better mileage
What confuses me is that with the servo unplugged i can blast it to 70mph and then the bike doesn't want to rev any higher, yet with the servo plugged in ill be struggling to pull from 60-65, crawl to 70 then if conditions are right crawl to 75.
