1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Help Suzuki RG250 - Won’t rev out??

Discussion in 'Suzuki 250cc 2 Strokes' started by warnzie, Nov 21, 2018.

  1. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    Hi everyone, have had the carbs cleaned and a few rubber seals in them replaced, the guys also found that the powervalve cover was around the wrong way so the cables were sticking into it and not fully opening the valve. But......it’s running great but when it hits 8700-9000rpm it just doesn’t want to rev out?

    I did read somewhere that the rg up top did drop off but is this normal?

    I’m also thinking as my rg250 (mk111) is a jap domestic import does it have a limiter compared to Aussie delivered ones?
     
    Last edited by a moderator: Nov 21, 2018
  2. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    3,486
    Likes Received:
    1,984
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's, 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G
    When it hit's 8700-9000rpm does the dash warning light come on at around 80km/h ?


    Could the powervalve need adjusting ?
    Not sure if this is your manual, but
    valve should close at 7,600 rpm, and then open again at 7,300 rpm as the rev's drop off

    Also with it being electronically controlled, is your battery good, putting out the correct voltage at idle, and at higher rpm's ?

    ExhaustValve.jpg
     
    • Like Like x 1
  3. Gert

    Gert Well-Known Member Premium Member

    Messages:
    66
    Likes Received:
    76
    Trophy Points:
    203
    Joined:
    Jun 14, 2016
    Gender:
    Male
    Location:
    The Netherlands
    When? In gear or with free revving?
     
  4. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    When in gear...checked powervalve op and all good??
     
  5. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    Here’s the position of my powervalve in the closed position...is this right?

    E22F9519-940D-426D-9110-0D354868D8D8.jpeg
     
  6. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    And to make sure when I rev the bike past the 7600rpm mark where the solenoid should move the powervalve, which direction should it move? Currently if looking at the powervalve reving it, it turns anti clockwise?
     
  7. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    3,486
    Likes Received:
    1,984
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's, 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G
    Look's like your's is sitting at a different position to the picture, i cant find any more detailed picture's sorry
    There was something i found saying when the exhaust valve is fully closed at 7600 rpm, there is a hole visible through the u shaped cutout on the cable wheel .
    Can you see anything like that at 7600 rpm's?
     
  8. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    Funny thing is my powervalve housing different to pic? Notice the line marking on manual to mine - it opposite.

    Could anyone confirm there powervalve rotary disc looks the same as mine?


    DDA90066-9DDB-449B-80DA-C6638CDDB1B2.jpeg
     
    Last edited by a moderator: Nov 22, 2018
  9. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

    Messages:
    3,724
    Likes Received:
    2,175
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    '99 YZF-R6, '99 GSF250VY
    Remove the plate and check that it has been fitted in the correct orientation. It looks to me like that large protrusion should be on the other side.

    EDIT: If my post is unclear, I mean flip the plate over.
     
    • Like Like x 1
    • Agree Agree x 1
    Last edited: Nov 22, 2018
  10. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    3,486
    Likes Received:
    1,984
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's, 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G
    The top pic shows the line on the disc lined up with the pointy tab on the right/bottom at 7600 rpm


    suzy.jpg
     
  11. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    Yeah I thought that too but if I did flip it I wouldn’t get access to the cables it would seem
     
  12. Gert

    Gert Well-Known Member Premium Member

    Messages:
    66
    Likes Received:
    76
    Trophy Points:
    203
    Joined:
    Jun 14, 2016
    Gender:
    Male
    Location:
    The Netherlands
    If I adjust the power valve of my Aprilia RS250, I remove the exhausts and look into the cilinder. That is the only correct way to set your powervalves, IMHO.
     
    • Like Like x 2
    • Agree Agree x 1
  13. warnzie

    warnzie Member Premium Member

    Messages:
    24
    Likes Received:
    6
    Trophy Points:
    13
    Joined:
    Oct 29, 2018
    Gender:
    Male
    Location:
    Australia
    My Bike:
    Suzuki RG250 Mk3
    So just an update on my powervalve issue, all is adjusted correctly even though the manual is different.

    I decided to double check the battery as I recalled on my Honda crm250 I had a fair few years ago with a servo controller PV that if the voltage wasn’t absolute it would play up.
    So I charged up the battery on a charger and noticed it was really bubbling and fizzing but didn’t think much of it at the time. The next day I put it back in and took a ride down to the guys who had adjusted the PV in the first place and would you believe it it reved our cleanly with no issues at all!!

    The service guy took it for a ride and said yep it’s fine, but he had another idea - if it’s working fine now after I’ve charged it let’s do a load test. Here’s my problem - the regulator is churning out 15v to the battery which is cooking it slowly and providing a varying voltage which is effecting the servo...looks like problem is solved
     
    • Like Like x 3
    • Nice Work Nice Work x 3
  14. Gert

    Gert Well-Known Member Premium Member

    Messages:
    66
    Likes Received:
    76
    Trophy Points:
    203
    Joined:
    Jun 14, 2016
    Gender:
    Male
    Location:
    The Netherlands
    With my RS250, same problem once. Regulator went down to 9volt with high revs. So no power enough to open de power valves. Eventhough, the bike did rev to 13.000 rpm, even with closes power valves. But not as aggressive as should be.
    Luckily for me, the RS is equipped with an on board volt meter, so easy to check.
     
    • Like Like x 1

Share This Page