[Roman]

1 sold, 1 package still left

[Roman]

You can put one or multiple pieces of tape to get the temps up.

Aim to run it at 130-140F. Once it gets to 150F or above, there will be noticeable loss of power on the bottom end.

[Roman]

Sold

[Roman]

We tested with and without metal restrictor in the black hose and it didn’t seem to matter

[Roman]

I went through all of this last year.
http://gorotax.com/information-bulletin-dellorto-ignition-system-how-to-assure-faultless-function/

I had an issue that the engine stopped revving past 12500 after the upgrade. Turns out it needed a crank sensor gasket installed, so it doesn’t pick up as much noise from the crank.

Also, all of a sudden an engine stopped revving past 10000 during one of the races. Wiring harness (EVO v1) went bad.

I would try a crank sensor first. If you are determined to take an engine to your engine builder, may be get him your wiring harness as well

[Roman]

If crank sensor is picking up too much noise, then without crank sensor gasket the engine won’t rev past 12500. At least, that’s the symptom that I had in Feb 2015. You could hear a bad sound when it cuts off exactly at 12500, and it feels like an electrical issue. If it revs past 12500 and slowly picks up RPM, I doubt it’s that.

Hard to tell anything else without knowing spark plug type, float height, etc. My guess is that it’s still too rich with 128 and 130. Give it a try with Denso IW-27 and 125 main jet. And make sure you have the right gear ratio and floats are not too lean.

P.S. It’s not uncommon to have people run 120 and 122 too, so you can try this for 1 session – it’s not going to hurt the engine.

[Roman]

you can PM me with specific questions

[Roman]

I have Tony 20124 for sale. See PM.

[Roman]

There are different fuel lines. If you use freeline for example, it will sit pretty tight on the T-connector.

Just follow this, pressure-based and put a long spring on the outside:

http://gorotax.com/documents/2015/07/bulletin-2015-7-modified-regulations-2015-united-states-rotax-max-technical-regulations-exhaust-valve.pdf

[Roman]

Ok. Thanks, Blake

[Roman]

Is the consensus here that pretty much everything should be rubber mounted, i.e. Coil, Ebox, and PV solenoid? 1 rubber standoff for coil, 1 for ebox, 2 for PV solenoid?

[Roman]

Yep. The problem looks exactly the same. Awesome description on the forum!

[Roman]

Another harness failed for me just last Saturday. All of a sudden, power valve stopped working and it would stay open all the time. We were chasing it down for several hours, finally replaced harness after replacing everything else and it started working.

I guess I’m that unlucky that I hit EVO crank sensor issue on two different engines and two EVO harnesses failed for me. Even engine starter failed last week also.

 

[Roman]

I guess everyone has seen this already, but just in case:

https://gorotax.com/information-bulletin-dellorto-ignition-system-how-to-assure-faultless-function/

[Roman]

Will be sending a warranty claim to Rotax…

[Roman]

Had an issue last weekend.

5 minutes before the heat race, all of a sudden kart wouldn’t start on a stand. Quickly changed e-box and coil, it fired, got it out on a track.

Two laps into the heat race, engine stopped revving past 9,000-10,000 RPM. Couldn’t start it after the heat.

Tried electrical degrease on wiring harness connectors and it didn’t help. Installed a new wiring harness and it’s all good.

[Roman]

We installed the latest PV update with a new T-connector and a new spring last weekend.

The power valve wouldn’t even open. Unless you reverse the green piece and point the arrow in the opposite direction… it starts opening, but even then it doesn’t work correctly. So we went back to the old setup with Y connector.

There is probably something that we’ve done incorrectly. Any tips?

[Roman]

Problem solved. Crank sensor. The old one didn’t go bad and I’m pretty sure it will work just fine with old-style ignition. But the new EVO stuff seems to be more sensitive to it

[Roman]

Thanks, guys.

PV gasket seems to be installed correctly, but I will double check. Ground is also correct, installed per EVO upgrade kit manual on the left rear bolt of cylinder head.

I am going to the track tomorrow to replace EVO parts one by one. Will report progress.

[Roman]

yes, 650 267 0074

[Roman]

yes, they are. sent a PM

[Roman]

brand new, stock

[Roman]

PM sent

[Author]

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