RG150 won't make power at high revs

[Jase W]

Hello,
I have been furiously prepping my RG150 for the VMCC series, and thought I had it all sorted. At a trackday a couple of weeks ago it was not revving much past 10k and wasnt making any power, I quick check discovered the powervalves werent opening. A bit of creative cable adjustment forced them permanently open, which then made the bike run sweet as in the powerband.

This weekend I took the powervalves out (the actuator was faulty and I had no worries riding without them), and after just taking it for a ride today it is now once again not making any power in the powerband!!

I know I am not the only one running without powervalves, so can anyone tell me if there is something I need to do? I have just removed all of the gear, nothing else (I was told this would be sweet as).

So far I have also checked the plug & airfilter. Both are fine.

When the fuel is left on, I have noticed some leaking from the carb overflow hose, however I figured this was not a major (as it drains to a bottle and doesnt happen while running as far as I can tell) and could be fixed at a later date. Could this be related?

Any help would be pretty hugely appreciated - I only have 2 weeks to get it sorted!!

[quallman1234]

Hey mate,

It's kyle, the guy who gave you a hand at the cdmtc track day.

I believe you need powervalve blanks (just something what goes into the slot as the same shape as the powervalve when fully open).
if you want to take them out.
As there is now a big empty space. What is a big thing for a 2 stroker.
I don't think i have a spare actuator.
But you could try pete. The best thing too do is put them in properly.

I might be wrong, your best bet is too give pete jones a ring.

How high is it revving now?

[Racey Rider]

So is removing the power valves a legal modification in Vic club streetstocks is it?

[Jase W]

Ahh I had a feeling that might be the case. Cheers for the help.

racey: I dont see why it wouldnt be as it doesnt increase power, its just one less thing to worry about breaking.

[ajturbo]

So is removing the power valves a legal modification in Vic club streetstocks is it?
no it is NOT legal to do this....

but as kyle said.. it probably will not run very well...

[ajturbo]

Ahh I had a feeling that might be the case. Cheers for the help.

racey: I dont see why it wouldnt be as it doesnt increase power, its just one less thing to worry about breaking.
you should read the rules on the VIC Club's web site...

Street STOCK class...

STOCK meaning... STOCK!!!!

[Jase W]

I'm not modifying it, just removing stuff. Bottom line, I'm not making any more power and i'm making it a little more challenging to ride. I may even learn much better riding habits this way rather than relying on the powervalves to save me if I mess up and end up out of the powerband. Looks like they'll be going back in though - I'll just adjust the cables so they are constantly open, that way there will be no protests about its legality.

[ajturbo]

I'm not modifying it, just removing stuff. Bottom line, I'm not making any more power and i'm making it a little more challenging to ride. I may even learn much better riding habits this way rather than relying on the powervalves to save me if I mess up and end up out of the powerband. Looks like they'll be going back in though - I'll just adjust the cables so they are constantly open, that way there will be no protests about its legality.
good boy... lol

[quallman1234]

No it is not an illegal mod.
In fact it is making the bike worse to ride. (Assuming you put blanks in).
Because you loose all your bottom end.
Its basically like locking the power valves open. (Assuming you put blanks in).
It won't run very well at all without blanks. As there is essentially a new hole in the barrel.

Like you say, put em back in. tbh that bike had some perk too it the whole 50m i rode it for =).
And there was less of a risk in them falling down the barrel.

I'll have another search for my spare actuator.

[quallman1234]

you should read the rules on the VIC Club's web site...

Street STOCK class...

STOCK meaning... STOCK!!!!

AJ its not unusual for people to put "blanks" in the RG150's.

You should know this matey.

AJ, i will be bringing a spare RG150 for the first couple rounds. Will remind you when we get there.

[Jase W]

Yeah it ran sweet as with cables adjusted, I just didn't consider that the powervalves still needed to be there even if not in use!

[ajturbo]

AJ its not unusual for people to put "blanks" in the RG150's.

You should know this matey.

AJ, i will be bringing a spare RG150 for the first couple rounds. Will remind you when we get there.

i meant taking them OUT...:calm:

[Str8 Jacket]

AJ, i will be bringing a spare RG150 for the first couple rounds. Will remind you when we get there.

Thanks dude! ;)

[quallman1234]

Thanks dude! ;)

No worries, just in case someone's go's bang.

Crap tyres but we can just swap rims. Hopefully it won't be needed. My bro's bikes coming up so i might as well bring a spare forever one. Its in decent condition now after its cliff exclursion.

Okay AJ =).

[ajturbo]

No worries, just in case someone's go's bang.

Crap tyres but we can just swap rims. Hopefully it won't be needed. My bro's bikes coming up so i might as well bring a spare forever one. Its in decent condition now after its cliff exclursion.

Okay AJ =).
i have a set of TT900's in the shed......

[Str8 Jacket]

i have a set of TT900's in the shed......

I have a set on my bike... :p

[Jase W]

All sorted now :D

Though I feel there is still a tiny bit of top-end left - the valves may not be quite opening fully. I will have to track down an actuator to fix the valves properly.

[Matt_banks]

sorry im new to the whole forum thing and dont knwo how to start a new post so will just try to reply to this one lol. I recently took the powervalves out of my RG150 to find that one of them was completely stuffed. aparently a new set is ridiculously expensive! so i thought i would just put some powervalve blanks in...does anyone know where i can get some PV blanks from?? cheers

[quallman1234]

sorry im new to the whole forum thing and dont knwo how to start a new post so will just try to reply to this one lol. I recently took the powervalves out of my RG150 to find that one of them was completely stuffed. aparently a new set is ridiculously expensive! so i thought i would just put some powervalve blanks in...does anyone know where i can get some PV blanks from?? cheers

Talk to pete jones down that way, he'll sort you out with some. Or get your old ones repaired.

His name is oyster on kb. PM him.

[imdying]

sorry im new to the whole forum thing and dont knwo how to start a new post so will just try to reply to this one lol. I recently took the powervalves out of my RG150 to find that one of them was completely stuffed. aparently a new set is ridiculously expensive! so i thought i would just put some powervalve blanks in...does anyone know where i can get some PV blanks from?? cheersThey're not ridiculously expensive.

[Jase W]

Time to revive this thread, rather than start a new one on the same subject.

Im trying to get the pv's sorted so that they work properly, and have borrowed a mates actuator to compare against my own. At the moment the only check I can do is with the wire on the battery (the bike is lacking an engine at the moment). I checked both actuators and they both move the same amount on that test, however I am not sure if this will show me whether or not one is faulty. I have also checked the resistance on them as per the service manual, both are within the limits on the triangle connector, but Im not sure about the reading on the rectangle connector as it keeps jumping all over the place (on both actuators) and doesn't match anything in the manual.

Does anyone know much about these actuators? From what I understand when they break they just dont work at all rather than half work...

[Str8 Jacket]

So does this mean that you will be racing this weekend or not?

[Jase W]

I will be at this stage - only got the top end to put on then its ready to go back in the bike. Just waiting on a couple of bits (should be here tomorrow) then I can get it done. So hopefully tomorrow night I'll either be jumping for joy or crying.

[FROSTY]

Just a little advice from personal experience with the lil RG--take this chance to clean the exhaust system out. you will be blown away sat the amount of crap that comes out.

[Jase W]

Yeah mate its getting de-carboned tomorrow :niceone:

[Sketchy_Racer]

you should read the rules on the VIC Club's web site...

Street STOCK class...

STOCK meaning... STOCK!!!!


i meant taking them OUT...:calm:

There is nothing wrong with taking them out AJ, in terms of following the rules, but the bike wont run very well with them out! Also nothing wrong with pinning them open, or putting blanks in, it's not making any gain to the motor what so ever, in fact just losing a bit of the low end power (That you shouldn't be using on the track)

Jase, It's important to get the powervalves set right. I have always ignored the little lines on the arm and barrel as the valves wear out, and even though the lines are aligned, the valves in the cylinder are in the wrong place.

You need the barrel to set them obviously, I have found the best way is to earth the test wire (with the whole assembly together) then adjust the cable adjusters so that when the valves are open they are perfectly flush with the top of the exhaust port, which makes the least amount of disturbance to your exhaust gases and port timing.

[Jase W]

Right, so when the actuator is opened by method of grounding the wire, that is its fully open position? It doesnt turn any further than that in normal operation? Cheers for your help so far.