seadoo xp 99 rpm missing

[mad mike]

hello guys maybe one of you can help me I have a seadoo xp 99 I have rebuild the engine en it runs good but from 2500 to 4000 rpm there is no power in the engine from 4000 to 7000 its good.
can someone help me pleace

thanx mike
ps sorry for my bad english i'm dutch

[Technical Support]

Do a compression test.

Verify your low speed screws on your carbs are out 1 1/4 turns from lightly seated, no more.

Are there any mods on the ski?

[1fastski.com]

raves are not working { i would bet } check to see the bellows are on and that the raves move free , also check the one way valve on the pluse line .

[mad mike]

the compression is good 12 bars thats ok the low speed screws are ok I checkt them .
1fastski.com what are raves ???? I realy dont know what the translation in dutch is for raves
i also checkt the carbs inside cleant the carbs and al that .
the one way valve is that the little valve below on the crankcase????

thanx guys

[mad mike]

sorry me agian no now mods on the ski
I have rebuilt over 30 engines and thee always run great my dad has a engine rebuilding company so I realy know what Im doing bud this ski makes me $#@&&%%$#$@#$#

thanx again for your time guys

[Colin GSXL]

Raves are the units on the exhaust. Parts 10 - 24 here http://216.37.204.202/seadoo_oem/Sea...pe=13&A=84&B=5

[mad mike]

owh ok in the netherlands we call it powervalves
and I checkt them cleant them att new o-rings new gaskets the whole engine is new i realy dont know
whats wrong

[Technical Support]

They are called powervalves as a generic term - on Sea-Doo's they are called RAVE (Rotax Adjustable Variable Exhaust) Vales.

[mad mike]

i think your right my gokart had the same problem and the shaft of the powervalve whas broken .
it is the same noise I here now so I let you know what was wrong

thanx

[Bill O'Neal2]

It would not rev to 7000 in the water if the rave valves were not retracting.

[mad mike]

the raves are reacting from 1500 rpm to ful trothle but if I let the rpm go back to 3000 the ski runs verry bad then when I give full trothle agian it takes 3-4 sec before the ski is reacting again I checkt everything I cant find the problem .

[Technical Support]

I think you have something wrong in the carbs.

[1fastski.com]

does sound like carbs if its running bad . or spark , what spark plugs are you running ?

[mad mike]

I run BR8ES I'm going to check the carps again the popof pressure is ok the gaskets are ok pulse is ok I think the carbs are good

[Bill O'Neal2]

The raves open from 1500 rpm? The solenoid won't open until you get past 4000+ rpm.

But, I'd look at the carbs first anyway.