Trouble with RC valve, electronics desynchronise the valve

pikkio · Derestricted Danger Joined: 14 Oct 2003 Karma :

YES,I'M IN ITALY ,SO I INTRODUCE MYSELF,MY NAME IS PIKKIO AND I'M SAILING THE WEB TO KNOW WHAT'S HAPPENED TO MIY BIKE.
HAVE YOU EVER HAD A PROBLEM SUCH THIS???
THE EXHAUST VALVE BRAIN WORKS IN THE OPPOSITE MANNER,AT LOW RPM THE VAVE IS OPEN,THE BIKE IS SLOW VERY SLOW,INCREASING RPM THE SITUATION GOES BETTER BUT IT'S A NON GOOD WORKING.
CAN SOMEONE HELP????
THANK YOU VERY MUCH!!!
I'M WAITING ON ANSWER!
THE BIKE IS NSR 125 R" RIDER "MODEL

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

look at the cables, and the timing set up on the RC valve.
Check th valves actually move when you turn the bike ignition on.

(take the exhaust of and have a feel around inside the manifold)
Check the operation is smooth.
____________________
Regards
Scott

pikkio · Derestricted Danger Joined: 14 Oct 2003 Karma :

The valves move,the auto check is ok.
But at minimum valves are wide open,it's like brain has messed up itself!
I know that rc got to be closed at low rpm and has to increase going high on,it's like the situation has turned 180degrees opposite!!!
I think it's a electronic fault,'cause the valves has no seizing problems,they move themselves easily.
I'm going crazy at it!!!

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

Take the RC valve out and turn it 90 degrees then.
____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

well at idle they should be open,
between 2 - 7 000rpm they should be closed
7000+ should be open

You might need to just adjust the RC valve by opening up the RC valve case,
Taking out the gold thing an turning it manually to an open position and then putting the gold thing back on.

alternatively taqke the tank off and fuck about with the motor at the top and get that to adjust it. or similar
____________________
Regards
Scott

pikkio · Derestricted Danger Joined: 14 Oct 2003 Karma :

of course,but rc valve is in stock position,no one move it,the problem should be the actuating leverages,did you ever had such problems??

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

Not really, people only really have problems with them fucking up completly, being shagged and stuck (open . closed)

or they just work fine.

Never really hear about them working but the wrong way,
must be needing another set up.

as marjay said you could do that, but i think getting it out the barrel would be an absolute git while its still in the bike,
____________________
Regards
Scott

pikkio · Derestricted Danger Joined: 14 Oct 2003 Karma :

Ok i'll take as english sense of humour!
bye

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

Thats the only way I can think of that it can be working the wrong way up, in my limited knowledge of the NSR. Smile

On the TZR/DT 125 turning the powervalve through 90 degrees gave you an extra 5bhp top end but made the midrange a bit poo.
Maybe the previous owner had the same idea about the NSR, its not beyond the realms of possibility. Confused

I didn't know it was a bitch to get at though. Sad

____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

pikkio · Derestricted Danger Joined: 14 Oct 2003 Karma :

No it was stock tuned,seems like electric engine that moves the valve sets itself in another way,yesterday was ok,today is wrong!!!
I'm not kidding no one,i use kidding my friends on motocross track!!

Kickstart@Work · Scooby Slapper Joined: 26 Sep 2003 Karma :

Hi

You say the valve works OK sometimes, but not at other times. This counts out my first idea that the cables were on the wrong way round!

As Scotty says when you turn the ignition on the valve should open, and it is open with the engine running at very low revs. This is just so that when you are going around town the valve is still regularly opened and closed to try and stop it sticking.

Once the revs rise (to about 2000rpm) the valve should close to give you normal low down power, then open at higher revs (~7000) to give you power at high revs.

Take the exhaust off and look up into the barrel at the valve (engine turned OFF) and check that the valve is OK. One guy on here (mcjamweasal) had problems with his bike as on of the power valve blades had worn out and jammed, virtually blocking half the exhaust ports.

The only things I can think of are that the control unit is faulty or that the valve is jamming and confusing the control unit.

All the best

Keith
____________________
Atheism is a not for prophet organisation

stevo as b4 · World Chat Champion Joined: 17 Jul 2003 Karma :

If the valves are open below 2000rpm i dont know how honda gets it to tick over properly then. When i was checking the operation of the KIPS valves on my KMX200 i found that if they were fixed open, the bike would barely tickover, let alone pull away below 6k rpm.

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

yeah but its a different system / engine and pipe on an NSR so maybe it needs to be open for it to tick over at those rev's and back pressure.
____________________
Regards
Scott

pikkio · Derestricted Danger Joined: 14 Oct 2003 Karma :

thank you all,i think it's electronic fault.