New Rider
Currently Offline
Posts: 2
Likes: 0
Joined: Aug 15, 2014 14:23:07 GMT -5
|
Post by bogus1 on Aug 15, 2014 15:01:19 GMT -5
Hello all glad to join the new form. I was given a Gorilla Motor Works RX50 scooter my brother was having fits with and he was about to destroy it.
It had not spark and he was told it was the stator so he attempted to remove it without the proper puller and broke the cast aluminum housing trying to pry the fly wheel off! He previously thought it was the carburetor and bought a new one. Anyway he gave up and gave it to me as his temper got the best of him.
This scooter only has 442 miles on it. Here is what I have done; Purchased the puller and removed the stator which has 8 coils two are wrapped. I tested the pickup and it was bad so I bought a new stator and as back up a new CDI and Ignition coil to hedge my bets. I tig welded the case plate and installed the new stator, charged the battery and tried to start it. It started and idled very low, when I turned the throttle it died. So I checked the carb air/fuel mix screw and noted how many turns then turned it out 2 1/2 turns and tried to start it again. It started and the idle was a little higher but again if I touched the throttle to try to keep it running long enough to warm up it died. So I am thinking it could be the valves needing adjusting but being it only has 442 miles am doubting this. So does anyone here have any sage advice to give this old lady? Note I have worked on cars, motorcycles and small engines and yes I can weld with the best of 'em LOL.
|
|
|
Post by alleyoop on Aug 15, 2014 16:11:08 GMT -5
Adjust the valves both valves to .003 inchs, before you try and compensate with the carbs setting. These are Chinese clones and many come with the valves tight. Also due to the cheap metals they use the valve seats compress and tighten up your valves in no time. Once the motor has some miles on it over 1000 the head no longer compress that much and the valve adjustments get longer in duration. The other thing is the carbs Pilot Jet and it's tiny fuel outlets by the butterfly may be clogged. You can take a Spray Can of Carb cleaner they come with a long thin straw and stick it in the PILOT JET and spray and spray should come out by the tiny fuel outlets by the butterfly. If spray does not come out take a needle or pin and poke the tiny outlets to clear them. Also make sure you have the Air Filter on otherwise it is sucking to much air and not enough fuel. Alleyoop
|
|
Freshman Rider
Currently Offline
Posts: 59
Likes: 2
Joined: Jul 15, 2014 1:13:42 GMT -5
|
Post by scotttx on Aug 15, 2014 20:30:34 GMT -5
and look for bad vacuum lines. original ones crack
|
|
New Rider
Currently Offline
Posts: 2
Likes: 0
Joined: Aug 15, 2014 14:23:07 GMT -5
|
Post by bogus1 on Aug 18, 2014 14:14:59 GMT -5
This scooter is a 2013 bought in Dec 2013. The hoses and rubber are like new. All vacuum lines are connected. Well I checked the valve gap and both were @ .003. I found this on line manual see below, and it states to set the gap at 0.05mm or (.00197in) ! Out of 3 sets of feeler gauges I have I do not have a 0.05mm! This must be Wrong. Or is this Right??? I fooled with different setting as per some suggestions of intake @ .003 and exhaust @ .004 And lastly at .005 for both. Nothing seemed to effect it starting let alone running. I then set the valves back at .003 and then installed the original carb and installed a new ignition coil and CDI box. I double checked the stator voltage output all that is good. But It still will not start. The carb is brand new but I did check it and the fuel is passing through. So I throw my hands up in the air! Anyone have an idea as to what is wrong or what I might have missed? ?
|
|
|
Post by alleyoop on Aug 18, 2014 14:49:18 GMT -5
IT IS EITHER NO SPARK OR NO FUEL TO THE MOTOR. THE CARB MAY BE FULL BUT NO FUEL IS BEING SUCKED OUT INTO THE MOTOR.
Ok, your valves are fine supposedly, So now check for SPARK, if you have a spare spark plug take the BOOT CAP off the one on the motor and stick the plug in the boot cap. Now hold the metal part of the plug on the VALVE COVER and crank it and see if it is sparking. IF SO stick the BOOT CAP back on the spark plug in the motor. Now give it a couple of cranks, Now take the plug out of the motor and see if it is WET OR DRY. IF DRY and it did not FIRE ONCE gas is not being sucked into the motor.
IF no gas DRY PLUG, turn the fuel ratio screw clockwise until it stops then turn it out 2 1/2 turns and try that. Get back on this with the results. Also if after turning the fuel ratio screw out 2 1/2 turns STILL does not fire AGAIN TAKE the plug put and see if it is WET OR DRY. Alleyoop
|
|