Aprilia rs125 powervalve

[Daryl86]

Hi guys. Ive got an aprilia rs 125 with a very stuck powervalve. Ive managed to lever it out about 5 mm but it won't budge any further. I've even managed to snap a screwdriver so far.

I've tried to get it out after a long ride in the hope that a hot engine will help but no luck. Ive soaked in in wd40 for a day and also some other penetrating spray. Nothing.

I might try using a blowtorch to heat it up and see if that helps.

So has anyone got a magical solution on how to get it out or any other knowledge that might help?

Thanks, Daryl.

[Damon]

keep on with the wd40, petrol etc and it will eventually come out. Can you get something like a feeler gauge into the gap to try and free it up a bit?

The rs powervalves always stick, especially if they have been run rich

Good luck

[Kickstart]

Hi

Possibly the least risky way (as the power valves have a habit of snapping) is to take the barrel off so you can carefully knock the valve out from below.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing