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Post by alleyoop on May 22, 2014 15:08:09 GMT -5
I forgot Bille if its a 50cc then set them both to .003 inchs if its a 150cc set them both to .004 inchs.
Alleyoop
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Post by alleyoop on May 22, 2014 15:08:38 GMT -5
I forgot Bille if its a 50cc then set them both to .003 inchs if its a 150cc set them both to .004 inchs.
Alleyoop
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Post by alleyoop on May 22, 2014 15:10:24 GMT -5
I forgot Bille if its a 50cc then set them both to .003 inchs or you can set the TOP INTAKE to .003 inchs and the EXHAUST which is the one that usually gets tight to .004 inchs, if its a 150cc set the top to .004 inches and the bottom exhaust to .005 inchs.
Alleyoop
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Post by bille on May 22, 2014 17:25:24 GMT -5
I forgot Bille if its a 50cc then set them both to .003 inchs or you can set the TOP INTAKE to .003 inchs and the EXHAUST which is the one that usually gets tight to .004 inchs, if its a 150cc set the top to .004 inches and the bottom exhaust to .005 inchs. Alleyoop It's 150cc. Just to make sure I'm doing this right, to set it correctly I slide the .004 in and tighten the valve onto the feeler until its slightly hard to pull out the feeler? |
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Post by alleyoop on May 22, 2014 21:47:01 GMT -5
CORRECT, Make sure you bring it up to TOP DEAD CENTER when the CAM SPROCKET LINES UP like this. Alleyoop In this position you should be able to grab the rockers and wiggle them.  |
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Post by bille on May 23, 2014 12:21:05 GMT -5
Working on the valves now. I noticed with the top one, I can fix a .004 or a .005 in it, so I guess I'm going to try and tighten it until a .005 doesn't fit? I still need to check the bottom one.
I made a video showing the top
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Post by bille on May 23, 2014 13:14:42 GMT -5
Bottom one seemed too tight...putting it all back together now.
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Post by alleyoop on May 23, 2014 14:16:21 GMT -5
Good luck bro, that is what I do I adjust mine then try and put then next thick one in and it should not go in.
And after I am done with both I turn the motor over by hand several times and re-check them before I button it up.
Alleyoop
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Post by bille on May 23, 2014 21:22:03 GMT -5
Update!
So that bottom valve being too tight was causing some of the issues. Right now it idles and runs but I'm getting hesitation on the throttle and it stalls sometimes. Although, now when it stalls it starts right back up, so if I'm learning something here, that is a fuel problem. I tried turning the mixture screw half turn counter clockwise and that seemed to make the hesitation worse. So next I turned it a full turn clockwise and that also was pretty bad. So I gave up....for the night I guess. I will try again tomorrow.
Also, even though it's not really rideable yet, it's 150% better now that I fixed that bottom valve. Runs and idles much better and is consistent, rather then running differently hot/cold/warm.
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Post by JerryScript on May 23, 2014 23:39:50 GMT -5
Yep, a tight exhaust valve will not fully close. When this happens, you loose compression due to a slight gap around the valve, and you allow unburned fuel to go out that valve as the compression stroke occurs, so you end up with a fraction of the air/fuel you should have in the cylinder.
Now that you have the valves set right, you can start working on the proper air/fuel mixture, and being certain you have appropriately sized jets. Give that carb a thorough cleaning, then follow Alleyoop's carb tuning instructions.
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Post by bille on May 24, 2014 11:51:07 GMT -5
I worked on the idle and mixture for about 15 mins and the engine cut off and now it won't start back up. Been trying to restart for 10 mins now
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Post by bille on May 24, 2014 12:55:57 GMT -5
Just got it running again, it was idling around 1900. I touched the back brake and it stalled, won't restart.
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Post by bille on May 24, 2014 13:37:47 GMT -5
I reset the mixture screw to 2.5 turns clockwise and got it started. It idled around 1500 for about 4 minutes, then stalled and now won't restart.
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Post by alleyoop on May 24, 2014 15:39:32 GMT -5
Billie, Here is what I think the problem is now. And it has to do with your CVT. Reason it died when you pulled the brake is the motor was turning rear wheel to fast at low rpms and the load kills the motor. That is why you are having a hard time and cannot adjust the carb and idle speed screw to idle around 1500-1800 WITHOUT the rear wheel spinning to fast.
YOUR CLUTCH is being engaged at to low of RPMS and they will not idle low due to the load on the motor to turn the Rear Wheel. Then because at a certain rpm the motor can keep running with enough power and turning the rear wheel when you put on the brakes the rpms drop due to much load on the motor and it dies.
So take the CVT cover off and start it and let it IDLE and VIDEO the CVT working from the side forget about looking at the tach just take a video of the CVT and belt turning so we can see where the belt is in the Variator and the Clutch pulley.
Alleyoop
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Post by bille on May 24, 2014 16:24:26 GMT -5
can't get it started but will keep trying.
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..BAD TO THE BONE..
