Power valve probs

**Fri Aug 05, 2005 8:58 pm » Post: #1 » Download Post**

Hi All

I've recently changed my servo motor on my MC21 coz it was struggling to turn the powervalves. When i turn ignition on the PV's automatically turn themselves to the high(fully open) positon, when it should actually be closing itself. Another problem is that it stays completely open no matter what revs i do.
Any help would be appreciated.
Thx

**Fri Aug 05, 2005 10:09 pm » Post: #2 » Download Post**

Have you checked your throttle position sensor is connected?

**Fri Aug 05, 2005 11:01 pm » Post: #3 » Download Post**

yeha when i took my carbs out to clean them(disconnected the throttle position sensor also) and turned on the ignition the same thing happened...so yeah chek the connection.
_________________
Philip Ahn
MC21 NSR250R

im poor...

**Sat Aug 06, 2005 10:12 am » Post: #4 » Download Post**

If they're going the wrong way, have you checked that the cables aren't crossed over?

Have you checked the valve cable tension, and the valves themselves for build up of crud.

PV problems can lead to a fried PGM, so pay special attention to the cable tension
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

**Sat Aug 06, 2005 11:11 am » Post: #5 » Download Post**

Dave Ett wrote:...so pay special attention to the cable tension.

Yeah Dave, best pay special attention to the cable tension, eh?! Wink

_________________
Andy.
NSR-WORLD.COM

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