Got The Holeshot
Arm chair racerJust too addicted
My 85/86 Hybrid 250r is still not running correctly,tends to stutter throught the mid range,top end is good
CT Pipe
K&N Filter
Air Box Lid Fitted
160main(have tried 155 with same deal)
Needle 3rd clip
Stock Motor
Any combo's that work ok i can monkey with ?
Aussie
Keeping 3 Wheelers Alive Downunder !
Power User
Roostin Away
Aussie, start raising the clip on the needle. That will take some of your mid range fuel away.
83 ATC 60-R Cr60 converted with Zinger parts.
83 ATC 70.
83 Tri zinger
ATC 85-R Cr85 engine on shortened 86-R frame.
ATC450AF
86 310-R Drag racer
440 snowmobile powered custom built.
87 Cr 500 Converted to Drag racer
Power User
Teaching quads a lesson
Your general altitude, Temp, humidity and plug check color would be helpful please ...... at first guess, I would say Clip position too, but .......
J. Jonny D, --- Quad - Trike relations committee Chairman and all around swell guy.
Rides: '91 Warrior, '87 TW200, 1984 YTM225DX, 1984 ATC125M, '71 CL350 Scrambler
Got The Holeshot
Arm chair racerJust too addicted
Will do and see how she goes,its giving me the SH#TS having to be on the gas all the time to pass over that stuttering part of the band.
Thanks for the tips gents.
Aussie
Keeping 3 Wheelers Alive Downunder !
At The Back Of The Pack
Arm chair racerFirst time rider
I also have a question about jetting. Would the wrong jet size make it not go back down to idle. I just had my cylinder replated and it runs good but it won't go back down to idle unless I adjust the idle down but then it is too low and it stalls. So I start it up adjust the idle, rev it up and it goes down some but not all the way down. So could it be the jets or something else?
85 250 R extra bike
85 tecate 3 brothers bike
86 tecate 3 my bike
Worthless, would be a vast improvement.
Arm chair racerJust too addicted
I fixed all my problems by setting everything (jetting) back to factory spec for my altitute including running 20:1 regular old skool good quality 2 stroke oil.
Running aftermarket expansion chamber and silencer also on a stock engine.
Runs like it should now. Smooth power. Plug is tan like the color of cardboard.
1980 110
1982 250R
1985 200s
1985 250R
1985 350X
Parting out...
1983 250R
1984 185s
PM me for parts
Power User
Roostin Away
Maybe your throttle slide might be sticking?Originally Posted by Enigma
Power User
Roostin Away
I have a 1985 250r set up the same way. All stock except for a pipe. Runs fantastic on 20:1.
Power User
Teaching quads a lesson
Sounds more likely to be an airleak past the carb somewhere, especially after a rebuild.
Rides: '91 Warrior, '87 TW200, 1984 YTM225DX, 1984 ATC125M, '71 CL350 Scrambler
Power User
The day begins with 3WW
I had a similar problem last time out and that's exactly what I did but turned out to be the exact opposite of what I needed to do.
If the machine bogs like you forgot to turn the gas on, drop the clip to raise the needle. It's not getting enough gas.
If it sputters like they do wide open with too rich of a main jet, raise the clip to lean it out.
It's hard to tell the difference until you screw up and adjust the needle in the wrong direction once or twice.
Registered User
Just too addicted
If its a PJ, they tend to run very rich from float problems. Mine did exactly the same thing (puked out off idle). The carb (86 PJ) was so whacked I had to ditch the float and use a go kart type fuel control system. Major drop in fuel level and main jet (132). Now it absolutely screams at any throttle setting.
Midrange is made up of:
1.) slow jet
2.) main needle taper, length etc
Changing the main jet wont do much for the midrange, thats (mostly) for wide open.
Reply With Quote
