After short breakin I was doing some fluxuating crusin and noticed the powervalves were causing the RPM's to go up & down @ about 4000-4500.I know theres been a lot on this subject but was hoping for some fast advice.Stock bore-Ported exhaust-RPM carb mod & couplers-Advent-Turbo tube-150lbs.

confirm it is PVs by going for a ride while disconnecting the servo motor cable - while you are at it use some contact cleaner on the connector plugs

if it is PVs, try swapping out the servo motor and if that doesn't fix it swap out the CDI

Steve,how much coffee did you drink before you rode

Philip,I rode with the seat off & could see them turning in time with the surging(200-300rpm's).I plan on re-adjusting everthing,cleaning connections,and try again.She sure sounds good @wot with the seat off Thanks all! Oh Woody,I didnt need any Coffee I was Jacked up enough Shes no tripple piper,But I'm still anxious to get the bugs out No SHEEP

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Same thing is happening to my ski at a little higher rpm. Started when I installed my Advent.

Time to go gas boys! Once you go gas you will never go back!

Hmmm.The advents been on there since I got the ski and never faultered once.Cant figure out why it happened the same time I did the top end.Oh well,its doin it now!Will test again in a couple days,thanks Boogie

Ya,I know Jay,but I cant see spendin that much on valves when I really want to go BB and lose the valves.Hope you and Nando can make the WF's

It seems like my engine wants to stay with electric valves. First the nut gets stuck striped (dont want to know how I got that out) then it was **** near impossible to get the stinger holder out, then the rod hits the stinger and had to cut the rod. Now the valve says no, im staying electric. WTF?

what r we dealin' with here? a bunch of novices or what?

thats 100% normal for a electric valve with the advent ignition.

either raise or lower the valve opening to an area in the rpm band that you "less" frequently cruise @.

i hated that part of the electric valves....the oem cdi has a slower opening and closing function....making it "less" noticable then the "quick" acting advent valve function.

well said jay.....go gas and u never go back....or you never go valves again? either way i suppose.

Steve,whats your snap set at

Let me translate woodenease to english. He wants to know what rpm range you have the valves opening at on your advent. When you answer steve Ill translate sheepenease back to woodenease.

I didnt have enough wraps on #1 for my tiny pos to work half way right,but after Hops post the lights came on and the elevater went straight to the top floor.Thanks Hop,I am an amateur when it comes to power valves,but Im not to old to understand I can adjust the valves to the lowest rpm range where it will be noticed least.Oh! Tanks for the translation Joeblowinease Hopatcong, I really figured that hammerin it that hard on breakin, runnin with the Top ring only and 61mm wide exhaust,I would hang a ring but all the old used parts refuse to die Im gonna force myself into a BB this winter
Hey Insane one,thanks for all the good advise on the by-pass & Tiny tach

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i see you like BIG holes too! certain ones i like smaller...but others i like LARGE!

Big Bore, no valves....oh yeah!!!!!!
I'm sitting here in Taipei, Taiwan going crazy. I will have some serious make up riding when I get back to the US. The GK big bore is the real deal and every die hard GPR fanatic should not leave home with out it.

Woody,my ski had been gone thru by riva right before I bought it & they had the snap set @60,which is a tripple pipe setting.also I installed a by pass from the back fitting on the head and the rubber boot is still swelling & leaking.To top it off one of my QT cables froze up and broke my twist grip inside.This thing will not give me a break,Im running out of time & work I cant afford to blow-off has picked up for the last time before it dies for the winter,and Im not sleeping good-no matter how many sheep I count

I've set my snap setting at every setting there is, and I still get that annoying surge. It doesn't help that since I went ported BB, I have another surge problem at around 5000 rpm when the engine apparently wants to "get up on the pipe" (don't get excited, Fercho) and make a rapid 800-1000 rpm jump. Which, of course, puts me right in the range where the PV's want to rapidly open. It makes for a very "jumpy" ride sometimes.

Fullboogie,It helped a lot when I adjusted the cables to open early.I put the advent on my wifes fairly stock ski-same thing

Thanks H2, I'll try that this weekend.