2005 Raptor 350 NO SPARK!!! - Yamaha Raptor Forum

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Old 03-06-2011, 11:23 AM   #1 (permalink)
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Default 2005 Raptor 350 NO SPARK!!!

My son has a 2005 Raptor. It sat with a dead battery for about 15 months. ( at a friends house) I have checked the fuses. I need to know how to check the CDI box. I down loaded the service manual, off this forum. It helped greatly. Is there something I'm missing?? New spark plug, new battery. Thank you for any help.
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Old 03-08-2011, 11:30 PM   #2 (permalink)
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Welcome to the forum! Lots of good info here as I have learned some in a short time. If you search (assuming you didn't yet) with some key words you'll get some good hits on troubleshooting your problem. I have the same problem that you do...You can't test the CDI by itself unless you have an oscilloscope (sp). Test everything else per the service manual and leave the CDI till last. Good luck!
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Old 03-10-2011, 02:05 PM   #3 (permalink)
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We are having the same issue but, if we pull start the bike it runs. We can shut it off & it will start back up all day. Only when cold it wont start on its own. The carb has been rebuilt & rejetted, the valves have been adjusted twice. Our last guess is possibly the stator but we don't want to spend $400 & still have the same problem.
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Old 03-10-2011, 10:36 PM   #4 (permalink)
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glennoli: This is almost always related to valve adjustment. Are you positive that your intake valves are not too tight? Are you adjusting valves at TDC compression stroke (not exhaust stroke)?

Next time it won't start cold, spray starting fluid down the carb throat and try again - what happens? If it tries to run, the carb is not supplying the proper amount of fuel... if it doesn't check spark - if there, check valve clearance (again).
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Old 03-10-2011, 10:38 PM   #5 (permalink)
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Quote:
Originally Posted by jerseybuilt View Post
My son has a 2005 Raptor. It sat with a dead battery for about 15 months. ( at a friends house) I have checked the fuses. I need to know how to check the CDI box. I down loaded the service manual, off this forum. It helped greatly. Is there something I'm missing?? New spark plug, new battery. Thank you for any help.
No spark is usually due to stator... occasionally coil; it is almost never the CDI's fault - but it has happened.

But, the electical components usually dont die when just sitting. I'd suspect it's much more likely a corroded connection from sitting for over a year. Walk through and unplug, clean and replug all connections between the stator and CDI, coil and CDI and coil ground.

The CDI gets power from the run/stop switch and. When the CDI is properly powered and working, and if the neutral switch and relay is working correctly, the CDI provides 12V to the starter solenoid... SO, if the engine cranks over from the start switch, the CDI is at least powered and partially working, and all necessary switches, relays and the fuse are working correctly.
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'01 Polaris Scrambler 400, K&N
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'73 Yamaha CT3-175 Enduro (currently under restoration)
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Old 03-15-2011, 02:49 AM   #6 (permalink)
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Quote:
Originally Posted by QuadManiac View Post
No spark is usually due to stator... occasionally coil; it is almost never the CDI's fault - but it has happened.

But, the electical components usually dont die when just sitting. I'd suspect it's much more likely a corroded connection from sitting for over a year. Walk through and unplug, clean and replug all connections between the stator and CDI, coil and CDI and coil ground.

The CDI gets power from the run/stop switch and. When the CDI is properly powered and working, and if the neutral switch and relay is working correctly, the CDI provides 12V to the starter solenoid... SO, if the engine cranks over from the start switch, the CDI is at least powered and partially working, and all necessary switches, relays and the fuse are working correctly.
This is excellent information, but this puts me back to square one!

I have same problem as we speak, no spark. Bike was getting started weekly, but then just would not start.

I have new spark plug, checked the ignition coil resistances as per manual, checked the pick up coil and direction of rotation coil resistances as per manual, checked the kill switch, did various continuity tests on cables. Just as I thought it can only be the CDI, I read your post.

Bike turns over fine with the starter, but no spark. I have uncoupled all the connectors, cleaned them out, but still no spark.

Last thing I wanna do is take it to the stealership, for in the past I have managed to solve all the problems on the 350 myself, but this one has got me stuck now!
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Old 03-15-2011, 11:49 AM   #7 (permalink)
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I have the parts to fix either or both of these bikes if you need them. My sons bike blew up. Bad crank bearing.

If you need the computer, stator, coil let me know.

Ive also got other parts in new condition.

a arms
front hubs
front discs
front brakes
frame
gas tank
front shocks
rear shock
rear axle
rear swing arm
rear dog bone
im sure there is more just let me know
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