[Nigel Baines]

[quote quote=67053]Nigel, I have that engine as well, the TM K9 sprocket fits that spline. [/quote]

Thanks for the informative reply Robert. I had heard the TM was a different diameter, so that’s great to know.

I have been told that all the Vortex Splines are the same and had my local shop bring in a Vortex gear for me which is working great right now.

Cheers,

Nige

[Nigel Baines]

@Ambrose – 12,400rpm is basically all the engine will rev to if the Power Valve is closed.  Are you running your Power Valve on the original Vacuum set-up, or have you upgraded to the Pressure set-up?

You could put your PREVO Power Valve/RAVE back on to narrow down your problem too.

Cheers,

Nige

[Nigel Baines]

Eric,

There was a change to the operation of the EVO Power Valve. Originally it worked on Vacuum, but Rotax ‘upgraded’ it later to work on pressure. They supplied an upgrade kit to change this which included a ‘T’ connector instead of a ‘Y’ connector for below the fuel pump, a rubber isolator to mount the solenoid, a new green spring (to go between the Bellows and the Power Valve cap) and some black tubing. The diagram you have above shows the upgraded option.  If you had the original Vacuum set-up you will also need to remove a spring that is inside the bellows, alter your plumbing as per the above diagram and turn the green plastic one way valve around.

Hope this helps,

Nige

[Nigel Baines]

Thanks!

Well, it turns out we had another member with the failure of the PV staying open at the club tonight. This time we were able to locate this problem to the Orange/Green wire from the Ignition connector to the PV Solenoid connector, however, the issue was with the connection on the Ignition connector this time! New harness required however.

It has also come to light at the club that anyone who still has their PV solenoid hard mounted to the new EVO bracket can experience issues with the high RPM. Some karts would top out at 13800-14400 before the end of the straight, but once the rubber stand-off was installed, this problem was also resolved and the karts would rev freely to 14900. I believe the rubber stand-offs came in the later release of the EVO PV kit too. We think this may only become an issue once the engine is producing these high RPM’s due to the vibrations/resonance on the solenoid.

Nige.

[Nigel Baines]

Hey Roman,

I just had the same problem, but was able to locate the exact fault on the harness. It was a broken wire at the Power Valve solenoid connector

You can read all about it in this thread on our club forum.

http://www.ckrc.com/forums/viewtopic.php?f=4&t=2425&sid=1745cc774590cde3d254ff23415c5435

Nige.

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