How to tell which one this ECU is?

[Tennessee]

I was under the impression that you didn't have to adjust the cam with the stock class ecu. Im installing an ecu and there were directions on adjusting the cam. Is this the stock class ECU? And how can I tell. Thanks!

[rotax racing]

2005 stock class ecu. part number 4502. you must retard the cam with it.

[Tennessee]

Thank you very much! Now I will look for the "how to" on doing that! The directions said to do it really didn't show anything on how to.

[Green Hulk]

Put #3 cylinder on TDC

Lock the cam in place with the cam shaft locking tool (i think a long 3/8" bolt will work)

Loosen the 3 cam sprocket bolts.

Take the pump cone off the pump to gain access to the 12 mm allen bolt.

Rotate the pump counter clockwise until the 2 cam sprocket bolts are all the way to the right in the slots.

Tighten them down.

The manual will give information on locking the cam, etc.

[Tennessee]

Thanks GH! Getting it together.

[GPR/STX-15F/RXT]

Put #3 cylinder on TDC

Lock the cam in place with the cam shaft locking tool (i think a long 3/8" bolt will work)

Loosen the 3 cam sprocket bolts.

Take the pump cone off the pump to gain access to the 12 mm allen bolt.

Rotate the pump clockwise until the 2 cam sprocket bolts are all the way to the right in the slots.

Tighten them down.

The manual will give information on locking the cam, etc.

Hi Jerry, i did my RXT and my buddie Israel RXP cam retard mod today following your instruccions, thanks for all your help

Ray

[Green Hulk]

Glad to help Ray. Tell Israel i said hello!

[friebe1]

What is the reason for retarding the timing with that ecu.
For performance or for reliabillity?
Thanks,

[Green Hulk]

Strictly performance.

[somefun]

Is there a noticeable difference? And will it work on the none stock class RR ECU?