RGV Problem

[Hahn]

Hey fellas,

Got a problem, just got the bike going and took it for a ride. went very well except for the crap rear tire wanting to step out.

As i got home something happened, the bike still runs but appears to be limiting itself to about 6000 rpm :S can't be 100% on this rpm because the tacho doesn't want to work also.

Problem is intermittent (actually it works intermittently) and when tacho comes back rpm and power return.

Started bike this morning and ran well until it warmed up and happened again.

My guess is electrical, and most probably CDI.
Any other ideas?

Cheers

[F5 Dave]

Hmm, possibly power or earth connection in ign cct. Powervalve controler possibly. Go to RGV UK website, they'll have a better idea on common ailments.

[mark247]

So you are saying when the tacho works fine the bike revs fine and when the tacho is not working the bike doesnt go passed 6000rpm? If this is the case it could be that the tacho needs to be plugged in and working for the bike to work properly. Maybe the tacho tells the powervalve when to open and shut or something?

I say its certainly electrical and probably just a bad earth / wire, somewhere.

[Hahn]

So you are saying when the tacho works fine the bike revs fine and when the tacho is not working the bike doesnt go passed 6000rpm? If this is the case it could be that the tacho needs to be plugged in and working for the bike to work properly. Maybe the tacho tells the powervalve when to open and shut or something?

I say its certainly electrical and probably just a bad earth / wire, somewhere.


I think the tacho problem is related but not the cause, i got 6000 because it accelerated to 6k then the engine held there (like the 11000rpm governor) and the tacho stoped completely.
PV works at 8500.

Checked all plugs and pickups...
still got me stumped and I now hate wiring diagrams :mad:

[motorbyclist]

speedo wring plugged in? some bikes run like shite without an electrical connection to the speedo.... something to do with the speed limiters

you are SURE it's getting oil right?

[White trash]

Put a new battery in it. It's not giving enough juice to wind up the preload on the powerband. Threofre when you get to 6K, there's no powerband tension to release.

You're welcome.

Seriously though, it sounds like a battery is almost fucked.

[FruitLooPs]

my RG150 will sometimes have trouble opening the powervalves if the battery is flat or low.

still work 90% of the time, and it wouldn't sound anything like 6k rpm running, it sounds like its missing and horrible.

Powervalve controllers afaik are seperate on RGV's from tach, i'd be surprised if the tach was causing it.

My tach reads up and down willy nilly when the battery is flat, today it was for example and idling it was reading 4,000rpm when the engine was clearly not.

[MIZXR]

this is goning to sound a bit messed up but don't knock me till you try it. Rgvs have tiny fuel filters that are inserted into the carbs at the end of the fuel lins.
Chances are that these are blocked up which will create the problems that you are experiencing - sounds strange but been there and thought that. Cleaning them helped in my case and my mate got a good laugh as I was trying to tell him it was electrical.

[2Cycle]

I would have to agree with comments on the battery being at fault. Could even be just the connections to the battery.

[motorbyclist]

Put a new battery in it. It's not giving enough juice to wind up the preload on the powerband. Threofre when you get to 6K, there's no powerband tension to release.


i'll hope you meant to say powervalve:niceone:

you're probably right on with the electrics though

which is a shame as they are the hardest to find:pinch:

good luck man

[White trash]

i'll hope you meant to say powervalve:niceone:


Nah, the powerband. My old RGV had a real strong one, and that's why I guess they need alot of battery power to wind up.

[Ivan]

Also try replacing plugs as some times the plug might work fine but when put under a lot revs it can break down and stop

[White trash]

Also try replacing plugs as some times the plug might work fine but when put under a lot revs it can break down and stop
Good point. I'd forgotten that sometimes the powerband plug can come loose. This is particlarly common on the VJ21 as the single stage powervalve makes for a more savage powerband, putting the plug that holds your powerband to the cdi under alot more stress. Even the VJ22 can come loose but having a stronger powerband plug and a less intense powerband eases the tension on it.

[motorbyclist]

*head explodes*

[Hahn]

Good point. I'd forgotten that sometimes the powerband plug can come loose. This is particlarly common on the VJ21 as the single stage powervalve makes for a more savage powerband, putting the plug that holds your powerband to the cdi under alot more stress. Even the VJ22 can come loose but having a stronger powerband plug and a less intense powerband eases the tension on it.

Could you go into more detail please, powerband plugs and electric powerband? my understanding of a 2 stroke was that the powerband was to do with back pressures (exhaust expansion chambers) etc.
cheers

[Billy]

Check the coils as they are a weak link on the RGVs also check your plug caps and plugs

[Ixion]

So, clarify. You buzz up to 6k rpm all good, then the engine won't rev any more, and the tacho needle drops back to zero? Or the needle sits at 6K ? Or drops back to idle ?

This happens ALWAYS around 6K . In each gear ? What happens if you change down when it happens ? Does the engine rev more (by ear? or by tacho?)

What about when going up a steep hill? Same ? What about going down same steep hill ? Same ?

Same hot and cold ?

Start OK? Cold ? Hot ?

If you hold it at the 6k cutoff does the engine seem sweet, apart from not going past 6k ?

When the tacho kicks back in, does the engine then immediately accelerate past 6k? Or is there a pause?

Have you checked and rechecked the battery connections (tight? clean?) and all the connections around the power valve controller?

[Hahn]

So, clarify. You buzz up to 6k rpm all good, then the engine won't rev any more, and the tacho needle drops back to zero? Or the needle sits at 6K ? Or drops back to idle ?

This happens ALWAYS around 6K . In each gear ? What happens if you change down when it happens ? Does the engine rev more (by ear? or by tacho?)

What about when going up a steep hill? Same ? What about going down same steep hill ? Same ?

Same hot and cold ?

Start OK? Cold ? Hot ?

If you hold it at the 6k cutoff does the engine seem sweet, apart from not going past 6k ?

When the tacho kicks back in, does the engine then immediately accelerate past 6k? Or is there a pause?

Have you checked and rechecked the battery connections (tight? clean?) and all the connections around the power valve controller?

The needle drops to zero, in any gear. changing down, revs up then sits back where it was again, tacho doesnt move from 0. Same on hills and hot and cold. starts sweet.
Immediate reaction if tacho comes online.

Got sick of it and wanted easter, so bike in the shop.
But thanks for your help fellas :apint:

[Crazy Steve]

Put a new battery in it. It's not giving enough juice to wind up the preload on the powerband. Threofre when you get to 6K, there's no powerband tension to release.

You're welcome.

Seriously though, it sounds like a battery is almost fucked.

I would say this is the answer....

Same happened to mine..and to a mates..

Crazy Steve..

[Hahn]

If anyones interested or comes across this problem again;

It was the Stator pickup. (this also knocked out a cylinder).

Got it back from the shop now, but wheres my powerband gone!!! :bash: ... yay time to learn fuel systems :brick: it better be a filter!