200X Trouble

[DIGGER DOG]

This trike is driving me nuts :evil: It starts fine ,idles fine,snick it in gear and 1st is ok snick it in 2nd every thing good untill at the top and goin into 3rd then it starts missing or skipping .So I go to trouble shooting in the book ,check the valve clearances all good,swapped CDI with another one dont know if either are good,checked air pulse gap its good,dont have a timing light so I cant check timing but I have tried to retard and advance to no avail,checked pulse gen.it checks out even tried my spare its good too,tomorrow I think ill try to check the rotor and the springs.
I just bought a new carb didnt monkey with it all stock settings,fuel lines clear,fuel cap line clear,coil fine have to check my spares,all wires connected no shorts or loose conns.have I left any thing out? the trike does have a supertrapp it doesent leak at head or at silencer,I will try to compare main jet from old carb to new one to see if maybe that is the prob???Im lost :rolleyes:

[jeswinehart]

i personally will never own another 83 - 85 200x,,, that is how much good luck with them i have had but that's besides the point ( well i might buy one to scrap out on ebay )
i am thinking something worn,,, camshaft ends or something along those lines. heck,, you done all the normal tricks to trouble shooting.
if i read your post right, it starts falling off at high end r.p.m.

john

[DIGGER DOG]

yea jes it starts skipping at the higher rpms,before i did resto it would pop a little at the high rpms now its doing it really bad not really ridable at low or high rpms, if it is the cam could I put a little hotter cam in with out doing any more mods exept for may be jets?

[DIGGER DOG]

I think I remeber reading somthing in the manual about cam chain sprockets being put on back wards would caus it to do this too ??

[Dirtcrasher]

Don't forget it's usually the little stuff. I had a trike with a poor connection at the CDI that skipped alot at high RPM's - kept thinking it was the carb but thats what it was.

[roger86200x]

have you checked the intake boot for leaks?? I have an 86 200x and it was popping and sputtering at high rpm's and the intake boot had a hole in it!! It caused it to run 2 lean and that would make it do that! I replaced it and it was fine! If you havent checked it CHECK IT! and you can look at your plug and see if it is running too lean also... but check the boot, for $10 and 5 mins I was good!

[DIGGER DOG]

dirtcrasher ,ive checked every conn. especially the cdi conn. when I swapped CDIs Ill re check again thanks,roger86200x,I havent checked the intake but I definately will thanks I didnt think about the intake and I do have a couple of spares. I did re check the pulse gen.with my ohm meter ,the meter is zero'd I even put in new battery,there is resistance fron the pulse generator but it is 0 the book says 1983 30-200 ohms after 83 50-150 ohms again my meter says 0 so may be its the pulse generator. If one of you guys could may be test your pulse gen and tell me if it is 30-200 or 50-150 ohms or if your meter read 0 and you dont have any problems that would help. I cant believe I didnt check the intake lol I did check the pipe at the head and silencer (diggers a dumb trailprotrailprotrailprotrailprotrailpro)I was right there lol thanks for all your in put guys its very much appreciated big time .thanks again

[roger86200x]

Hey- your welcome Digger, anytime. Im glad I could be of some help. I have a 86 200x and a 85 200x (I dont know what you have), but if you tell me what I need to do I probably can test the pulse gen for you on mine, but you have to tell me exactly what to do and I dont want to disassemble anything too much :) lol cuz then I'll b havin trouble! lemme know! :-D

[Wickedfinger]

... It sounds to me like you're running too rich. Definitely check that Main jet against a stock size, Ill bet its a couple of sizes bigger.

[roger86200x]

I would disagree... I think its running too lean, mine was doing the same thing, exactly, and it was a good sign of running too lean...too rich would just be boggy and slow to react...loss of power..... but too lean will runn "normal" to an extent but top end power will be severely limited and it will pop and sputter and stuff.... check the plug... if its white its running too lean... but of course if it isnt it still doesnt mean that you arent lean, you may be lean by just a little bit.... too much air or improper fuel/air mix/jet can cause that....hope it helps

[roger86200x]

hey- also..... tell me what you did on the restore.... I have some ideas... like if you put higher compression piston in and/or bigger one, or bigger cam or domed head, then it would make it worse if it was running too lean.... lemme know

[Wickedfinger]

Roger, I would tend to agree with you if it were a 2 stroke and or the problem were happening all over the powerband - but its a 200X and he mentioned it was only happening at the "top"
It starts fine ,idles fine,snick it in gear and 1st is ok snick it in 2nd every thing good untill at the top and goin into 3rd then it starts missing or skipping . Your main Jet controls most of your carburetion from about 5/8ths throttle opening to full. Whether its too lean or too rich, I'd have to say the Main is probably at fault. It just sounds to me from my experience with rejetting after putting on aftermarket exhausts like its acting too rich. His mention of a hard "skip" leads me to believe this. This is almost always a sign of a "Rich" condition caused either by an too large main or more remotely, an electrical problem. If he had said it was "Knocking or Pinging", then Yeah, I'd say it was running lean. Now back to the problem. What I would do is, as was mentioned before, monitor your sparkplug. Try this - run the bike untill the problem surfaces, cut the ignition immediately, let it cooldown, then check the plug. if its really white - too lean, if its black, sooty, or really dark brown and wet - too rich. I would use a brandnew plug to do this test as well. Good luck dude and let us know what you come up with.

[DIGGER DOG]

wow you guys are awesome thanks for helping me out dudes.
roger86200x,Wickedfinger,dirtcrasher.
I relly dont know wherer to begin,it is an 84 200x and the way you check the pulse gen. is disconnect the wires and put the ohm tester wires on the pulse generator wires it should read (the book says)1983 30-200 ohms after 1983 50-150 ohms that is for 1983 thru 1985 machines,as far as what i did on restore is no motor work just stripped every thing down to frame clean ,sand blast,paint the frame, swing arm, hubs,gas tank,also did some bondo on tank,painted the handle bars, pegs, gear shifter, brake lever,fork tubes,bought new plastics ,250r front fender in red,83-85-200x rear fenders in red.as far as I know the motor is stock give me your e mail add. roger86200x and ill send ya some pics.I also shved the coling fins on motor,polished the pulse gen cover,and sand blasted and painted motor.
ok as far as jets are concerned it ran the same way before i put on new carb,and since i got a resistance reading in ohms from pulse gen of 0 also 0 on spare pulse gen im willing to bet that its the pulse generator or may be weak springs on the spark advancer? the plug looked ok the white part that has the metal coming out of it was a little light brown,the metal part with the curved piece above it was a little black and sooty.
ive thouhgt about replacing the pulse gen,spark advancer,and putting in a little hotter cam. can i replace the cam with a hotter one with out doing anything else to motor ?or would i have to replace piston,re bore etc etc.. to do this ?? thanks again for all you guys in put it is invaluable to me

[Dirtcrasher]

wow you guys are awesome thanks for helping me out dudes.
roger86200x,Wickedfinger,dirtcrasher.
I relly dont know wherer to begin,it is an 84 200x and the way you check the pulse gen. is disconnect the wires and put the ohm tester wires on the pulse generator wires it should read (the book says)1983 30-200 ohms after 1983 50-150 ohms that is for 1983 thru 1985 machines,as far as what i did on restore is no motor work just stripped every thing down to frame clean ,sand blast,paint the frame, swing arm, hubs,gas tank,also did some bondo on tank,painted the handle bars, pegs, gear shifter, brake lever,fork tubes,bought new plastics ,250r front fender in red,83-85-200x rear fenders in red.as far as I know the motor is stock give me your e mail add. roger86200x and ill send ya some pics.I also shved the coling fins on motor,polished the pulse gen cover,and sand blasted and painted motor.


ok as far as jets are concerned it ran the same way before i put on new carb,and since i got a resistance reading in ohms from pulse gen of 0 also 0 on spare pulse gen im willing to bet that its the pulse generator or may be weak springs on the spark advancer? the plug looked ok the white part that has the metal coming out of it was a little light brown,the metal part with the curved piece above it was a little black and sooty.
ive thouhgt about replacing the pulse gen,spark advancer,and putting in a little hotter cam. can i replace the cam with a hotter one with out doing anything else to motor ?or would i have to replace piston,re bore etc etc.. to do this ?? thanks again for all you guys in put it is invaluable to me



Glad to try and help. I remember 5 years ago when my SX just would not run right at high RPM's - it was so frustrating!! I would clean the carb and try it again and change the plug and the clean the carb again - each time just hoping someone would cut me some slack and allow it to run right! I must have tried for 2 months until I started wiggling all the wires around and it died just as I wiggled the CDI connector - sure enough just under the tape were broken or damaged wires. When my trikes are screwed up I just can't focus on anything except that! Best of luck to you.

[DIGGER DOG]

awesome thanks dirtcrasher

[DIGGER DOG]

dirtcrasher gets the prize yall (a cookie) he was right ,I started going over everything once again ,I took the wiring harness off the trike and went over it with a fine tooth comb ,un taped every thing that was taped,put all new wire connectors on every thing ,all in all re did wiring harness somwhere in the mess had to be a loose connection because when I put it back on trike it ran flawlessly for a 2 hour ride so unless it starts skipping again wich would lead me to believe the CDI is bad the wiring harness was the problem it may have well been the connector for the pulse generator because when I unplugged it this time the connector came off the wire but I went ahead and re did the whole harness any ways.
thanks you guys for all the help figures it was somthing simple.

[Wickedfinger]

When my trikes are screwed up I just can't focus on anything except that!
... God, how true is that statement.

[MountainRider]

LMAO Tejas, I'm right there with ya'. One of my trikes is screwing up right now, and evarything else is on hold! The house is only half painted, the grass needs cut, the wife's car needs an oil change....but none of it will get done till the trike's purring like a kitten!!!