bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 24, 2011 15:15:35 GMT -5
Greetings, New to scooters, got one free from one a relative - a 2005 Vento Triton R4. Looks like they bought it and ran it till it broke then shoved it in the corner of the garage to rot. Took it home, would not crank. Replaced battery which would not charge. Now it cranks. Will not fire. Pulled plug and checked for spark. No spark. Cleaned electrical ground on coil - now I have spark. Cranked engine - would not fire. Sprayed starting fluid in carb inlet and it fired. Took tank off and dumped gross old 2+ years sitting in the tank fuel. Replaced fuel lines and fuel filter, checked vacuum petcock - it works. Drained and clean oil tank, replaced lines. Went to fire it up - no start. Grrrrr...... Tried starting fluid again - does fire with starting fluid. I can see fuel being drawn through the clear fuel filter too. (  ) That made me start wondering. So then I cranked to the starter and put my thumb into the carb inlet and it fired right up. If I restrict the carb air inlet it works and I can vary rpm with how much air I let in with my thumb. Now what? I got an air leak somewhere??? HELP! I am not sure what to do next. |
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Post by lshigham on Jul 24, 2011 15:20:16 GMT -5
Sounds like the pilot jet's blocked in the carb, so it's too lean to start without choking the carb. Give the carb a good clean if you haven't already.
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 24, 2011 15:23:28 GMT -5
Sounds like the pilot jet's blocked in the carb, so it's too lean to start without choking the carb. Give the carb a good clean if you haven't already. thanks for the input. Uhh....noob here - which one is the pilot jet? lol |
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tango
Scoot Enthusiast
Ad agendum semper parati
Posts: 389
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Post by tango on Jul 24, 2011 15:25:02 GMT -5
bigjeff: Welcome to the board! You may be new to scooters but you seem to be quite handy with the tools. Good job. I was new here too not so long ago and let me tell you, you've found the right place. These guys KNOW stuff. Sit back, relax and pop in every now and then as you glide through these pages. Always something new to learn.
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Post by lshigham on Jul 24, 2011 15:26:15 GMT -5
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 24, 2011 15:30:20 GMT -5
Thanks for the link and the welcome. I was looking at the online manual and see it has an auto choke. That may be a culprit. I am an aircraft mechanic (airframe and powerplant license) so I have fixed one or two things before. But then we got the manuals...lol.
Again - thanks.
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Post by 90GTVert on Jul 24, 2011 15:45:09 GMT -5
:welcome2:
Clean the carb first and reinstall the airbox. These little engines often don't like to run without the airbox in stock form. If that doesn't work, then check out the enricher. I think the first two might do it though.
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 24, 2011 18:35:20 GMT -5
will do - the carb comes apart tomorrow after work...
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 24, 2011 18:36:16 GMT -5
btw - how would you check out the enricher? When should there be a voltage?
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Post by 90GTVert on Jul 24, 2011 19:13:11 GMT -5
There should be voltage when the scoot is running. To check the enricher itself, apply power and see if the needle extends outward over time. The simple way would be to remove the enricher when it's cold and hasn't ran for a while. Look at it and measure how far out the needle is. Reinstall it and let the scooter run for a few minutes. Shut the scooter off and remove the enricher again. Look at it and measure if necessary. You should see that the needle now protrudes out farther. In allows more fuel to pass by for enrichment. Out blocks the fuel flow.
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 24, 2011 20:13:03 GMT -5
well look at that. I would rather just have a good ole' manual choke though. HA!
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 25, 2011 17:22:45 GMT -5
Took the carb all apart - and boy were the jets clogged and dirty. Got it soaking in acetone - just the metal parts and jets. Hope acetone is not too aggressive but it was all I had on hand. Tomorrow I will blow it all out and reassemble.
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 26, 2011 19:16:48 GMT -5
well- put the carb back together and put on the stock air box and after fiddling with the mixture and idle screw - I GOT THAT THING RUNNING LIKE A HONDA!!! Me a happy camper. Now on the the CVT - No belt. Got a new belt but the faces of the CVT have some corrosion. I will clean it up and see what happens. Be scooin' in no time or I'll be buying a new CVT system and asking how to install it. lol
Thanks for the help guys.
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bigjeff
Scoot Enthusiast
just scootin
Posts: 294
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Post by bigjeff on Jul 26, 2011 19:33:21 GMT -5
By the way - the slot on the mixture screw on my carb is worn out. I need one just like this. Got one laying around in that junk parts pile of yours? I'll paypal you a few bucks to mail it to me. Or is there a place to buy just a new screw? Bet not.  Thanks.  |
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Post by 90GTVert on Jul 27, 2011 6:44:10 GMT -5
Glad you got it running well. Check your wanted thread, Fox has a good fix for the mix screw there.
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) That made me start wondering. 
