vallartenses
XS400 New Member
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I just bought an 83 xs400 maxim (DOHC). It's complete and rust free but has been sitting for a couple years. I've cleaned the carbs (they were truly gunky, it took 3 days in the hot sonic washer to get them clean), installed a new battery, put on two new tires, and replaced a defective right bar switch. It now cranks and I get spark and have fuel ... but all I can get it to do is fire back through the exhaust. It seems that either ignition and/or cam timing is off.
Questions:
Which cylinder is #1?
Which ignition sensor, upper or lower, fires cyl #1?
Are there marks on the cam gears to confirm correct cam timing?
Where is the timing mark and/or TDC mark, and how is timing set on the bike?
I'm a parts guy in a motorcycle salvage shop (Stocker's in San Diego), and I'm having our tech guy do the work, but we don't have a DOHC manual and the only one I can find online is $80 directly from Yamaha. That's more than I spent for the bike! Can anyone walk me (my tech actually) through the process of making sure I get "bang" at the right time after "squeeze."
Your help would be most appreciated. It's a nice old bike and I'd hate to give up on it and consign it to salvage...
Questions:
Which cylinder is #1?
Which ignition sensor, upper or lower, fires cyl #1?
Are there marks on the cam gears to confirm correct cam timing?
Where is the timing mark and/or TDC mark, and how is timing set on the bike?
I'm a parts guy in a motorcycle salvage shop (Stocker's in San Diego), and I'm having our tech guy do the work, but we don't have a DOHC manual and the only one I can find online is $80 directly from Yamaha. That's more than I spent for the bike! Can anyone walk me (my tech actually) through the process of making sure I get "bang" at the right time after "squeeze."
Your help would be most appreciated. It's a nice old bike and I'd hate to give up on it and consign it to salvage...