aprila rs 125

[danny125kid]

hi i have a aprila rs 125 rs 1996. it has a power valve fitted which up to a few days ago was working fine ( hitting about 8000rpm and kicking in) but now it only kicks in every now and then and that's pumping the throttle hard! and when it dose kick in i hit just below 1000rpm and there is a flat spot?..... what i have done so far is cleaned carb, cleaned all fuel lines and tank and cleaned the power valve cable with wd40. any help or advice would be great ! thanks.

[stirlinggaz]

try cleaning the pv blade
cheers,
GAZ

[palmer]

with mine, when i start the bike the powervalve solenoid is fully on.

try it, watch the solenoid and start the bike, it should pop straight open, if not or it sticks a bit it needs a good clean.

hope this helps

[danny125kid]

ok thanks guys will try both

[Kickstart]

Hi

The power valve should be open until about 2500rpm, then closed from there until about 8000rpm (varies depending on the power valve control unit) where it opens for top end power. It is open at low rpm so that around town it regularly opens and closes to try and stop it sticking.

Good chance that the valve blade is just sticking in the barrel. Can be a pain to get them out, and gets worse the longer they are stuck for.

Easiest way to get at the valve, lift the tank, remove the battery and then remove the battery box (only a couple of bolts). You can then easily get at the valve from above. It is only held in place with 2 bolts.

Make sure when you put it back together that the valve is in the right way up.

All the best

Keith
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