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Post by ric812 on Apr 14, 2015 12:58:21 GMT -6
Just bought a united motors gp1r and it does not start, it will turn over but not fire. The carb, cdi and battery are new. The motor has a solid ground, it has spark and it is getting fuel. Where do o go from here?
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Post by cyborg on Apr 15, 2015 7:54:33 GMT -6
4 things need to happen,,,(1) you have spark (2) you have fuel,,(3) you need compression ,,you need to check the compression to see if you have it ( pull the plug and put your finger over the hole and hit the starter button if your finger gets pushed off the hole you're probably good there),,,and number 4 timing,,,you have to make sure the engine is firing on time,,,you get all 4 she should lite,,,oh and check the fuel to make sure it's good
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Post by jerryscript on Apr 15, 2015 10:49:23 GMT -6
5- valve lash, set to .004. I've fixed more friend's hard starting problems with a valve adjustment than anything else.
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Post by ric812 on Apr 15, 2015 11:16:46 GMT -6
I have set the valve so next I will check the timing. I have never set the timing on a scooter. Where are the timing marks and how do I set it?
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Post by Alleyoop on Apr 15, 2015 13:19:23 GMT -6
Since you guys always say YOU BEAT ME TO IT ALLEY, I will hang back and let you guys take a stab at it.   Alleyoop |
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Post by cyborg on Apr 15, 2015 14:14:52 GMT -6
Check your fuel quality first
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Post by cyborg on Apr 15, 2015 14:16:03 GMT -6
Oh I forgot to ask new? Used how many miles?
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Post by ric812 on Apr 15, 2015 16:29:22 GMT -6
It has about 2000 miles on it and the gas is new
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Post by cyborg on Apr 15, 2015 18:02:34 GMT -6
Check the oil?,,, check compression?,,,
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Post by Alleyoop on Apr 15, 2015 18:42:52 GMT -6
Ric812,
2 Questions:
1. When you are trying to start it DOES it attempt to start and FIRE?
2. When you are trying to start it DOES it JUST CRANK CRANK AND DOES NOT FIRE AT LEAST ONCE?
If you cannot tell the difference then Get a Video of you trying to start it just a few seconds of you trying to start it is all that is needed.
Alleyoop
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Post by ric812 on Apr 16, 2015 8:57:51 GMT -6
Alleyoop, the engine just turns over and never attempts to fire. I am going to try and check the timing tomorrow and check back in.
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Post by Alleyoop on Apr 16, 2015 11:07:19 GMT -6
When you set the valves did you bring it up to TOP DEAD CENTER by aligning the CAM SPROCKET like PIC . Also try starting it again and then take the plug out and see if it is WET or DRY. Alleyoop  |
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Post by ric812 on Apr 17, 2015 16:26:36 GMT -6
The plug was wet. And now it is running but I have a strong gas smell and white smoke. Cranking I have to hold the throttle almost half open and while running I can not get it to idled down enough to stop the rear wheel turning
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Post by ric812 on Apr 17, 2015 16:27:44 GMT -6
And thank you all for the help. Been working on card for 20+ years and I was worried a little scooter was getting the best of me.
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Post by Alleyoop on Apr 17, 2015 16:41:24 GMT -6
Ok, appears it is getting to much gas if you say you smell gas, is the AIR FILTER CLEAN and not clogged? So do this shut it off and TURN THE FUEL RATIO screw clockwise until it stops THEN turn it counter clockwise 2 turns and try starting it.  |
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..BAD TO THE BONE..