Raptor won’t start - Yamaha Raptor Forum
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post #1 of 3 (permalink) Old 09-27-2019, 08:03 PM Thread Starter
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Join Date: Sep 2017
Posts: 9
Raptor won’t start

I’ve been working on this atv on and off for too long. There’s no fuel getting to the plug. Carb has been rebuilt, cleaned multiple times, clean air filter, valves checked, float level checked. Still no fuel. It’ll sit in the garage I’ll try to start it, choke in choke out, full throttle, no throttle, nothing. Then one day I’ll go out and it’ll fire right up, and you can ride if for hours no issue, until it runs out of gas or it shuts off, then it’s a crap shoot if it wants to start or not. It all started one day when we were out riding, shut it off and it wouldn’t start. We finished the rest of the day by pulling it behind another quad and just pop starting it, which wasn’t easy either. Is there anything I’m missing? The only thing I haven’t checked is the compression. Maybe the compression is too low and it’s not creating enough suction to pull the fuel in?? I’m at a loss. I usually can fix everything myself but it’s getting on my nerves. Also the carb is a pia to take off on that quad. Any ideas?
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post #2 of 3 (permalink) Old 09-27-2019, 08:32 PM
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Join Date: May 2012
Location: Northern Colorado
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Check the vent on the gas cap. And fuel flows easily into a container if you pull the hose off and place it in one correct?

[U]2006 raptor 700

DMC Force 4's, FCI W/box, Dynatek Fusion,
CP 11:1 piston, BaMotorsports porting, HC3
RacersEdge +3TB
YFZ 450 fronts & reworked rear by JOGACA
Trailtech 1 1/8 xbar w/vapor dash & Vapor installed
ODI Rogue grips & ASV pro pack levers
Fastway steering stabilizer
68HP 49TQ

PM me if you need service manuals
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post #3 of 3 (permalink) Old 09-28-2019, 09:00 AM Thread Starter
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The tank vent is good.
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