Question about Yamaha XT 660 R Motorcycles

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I have replaced the coil, stater, and the brain and i still dont get any spark

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You don't mention the year and model...but here are some general ideas.

Most Yamahas have various safety interlocks designed into the wiring system....typically a neutral switch, a sidestand switch and a clutch switch, a tipover switch and a kill switch on the right handlebar.
The design basically is to prevent riding off with the sidestand down....so if the bike is in neutral, the neutral switch grounds to light your neutral lamp and allows for ignition and starter operation.
Is you place the unit in gear...if the sidestand switch senses the stand is still down, it kills the ignition and starter.
If the bike is in gear, starter will not operate, unless the clutch is pulled in and the clutch switch detects this happening.
Tip the bike over and the tipover switch kills the ignition and fuel pump if it has one.

So...is the igniter (black box/brain etc) getting supply voltage...if not check the ignition fuse, and the handlebar kill switch .
Is the neutral light working....if not...try starting with clutch in and sidestand up.

Posted on Mar 22, 2011

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Posted on Jan 02, 2017

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