Advancing The Cam?

[scooby-rxp-doo]

My Dealer has offered to advance my cam (for a fee of course!), he's been supporting one of our top seadoo racers, and recons a 10hp increase?

Anyone on here heard of this mod?

[Green Hulk]

I think he means retarding the cam. Yes, its a pretty common practice to retard the cam timing for more top end power.

[scooby-rxp-doo]

Cheers Jerry.... It's probably me that's got it incorrectly described!

[GPR/STX-15F/RXT]

Jerry, when i installed my stock class RR ECU in my 05' stage II RXT for the first time i noticed that my cam timing was already retarded from the factory, (the 3 allen bolts were all the way to the right in the slots) but in Israel 04' RXP the cam timing was advanced from the factory (the 3 allen bolts were all the way to the left) if this normal? do you know if the people from Rotax Racing are aware of this? thanks for your input

Ray

[Green Hulk]

Ray, it just depends on how they were assembled at the factory. Some are advanced, some retarded. This is alot of the reason you see some skis run faster than others.

[Vern]

How hard is it to look at the cam, and how hard is it to adjust this? I have never even pulled off the valve cover on my engine yet.

[Green Hulk]

The valve cover is easily removed and there is an end cap on the back of the head that you remove to access the camshaft sprocket bolts.

[GTXX]

Is the valve cover gasket re-usable? I forgot to add one to my last parts order.

[1 FAST VE]

Jerry are we talking major gains or just so so for doing this to the stock cam?

[Green Hulk]

Yes, the valve cover gasket is re useable.

I have never messed with the cam timing on a stock ski, but plan to do it on Careys ski if i ever get a minute of free time.

Playing with the cam timing on my ski has produces noticeable differences.