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advance timing

This is a discussion on advance timing within the Yamaha YFZ350 Banshee (1987-Present) forums, part of the Performance /Technical category; I was wondering what was the difference between advancing the timing +4 or +7? Dose the +7 just have more top end or do you ...

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Old 10-22-2002, 10:54 PM   #1
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Default advance timing

I was wondering what was the difference between advancing the timing +4 or +7? Dose the +7 just have more top end or do you have to change something or what?
2001 Banshee, Toomey T5s, Uni airfilter, XCR Holeshots, Pure Sport Realtors, Renthal Handlebars, Cascade Headlight Covers, Toomey Super Cooler Radiator, Cool Head w/21cc domes,V-Force reeds
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Old 10-22-2002, 11:22 PM   #2
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You should only advance the timing to 7 degrees if you run your motor for short periods of time, like in drag racing. It will also run a lot hotter and actually start to hurt performance at 7 degrees. Use +4 for normal use.

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Old 10-23-2002, 04:31 AM   #3
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advancing your timing more than +4 is not recommened unless you have a "built" banshee. And if you have a "built" banshee than your builder will recommend the timing advance for that particular motor.

Dan at Alloyspecialties CNC's adjustable timing plates that go up to +15 and said something I found pretty funny but pretty true. He said he gets asked by guys "what should I set my timing at". And his reply was "If you have to ask this question then you shouldnt be adjusting the timing at all". :cool:

Stay away from +7 unless your drag racing serioulsy, not just drag racing your buddies once in a while.

+4 is good enuf for most piped banshees any thing more can be catastrophic.

BTW I ride a modded banshee setup for MX and agg trail riding, and my engine builder recommened my timing set to only +2. Like screamin' said, more timing advance will produce more heat, and could cause detonation. More timing advance will make for a peakier powercurve, and +2 advance will produce nearly the same amount of HP as a +4 advance without the dreaded heat buildup and detonation troubles along with making the powerband more ridable for everyday trail riding and MX racing.
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Old 10-23-2002, 12:06 PM   #4
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you shouldnt run anything past +5 or 6 unless you are runnging alky. The alky needs more timing. Your timing alo depends on your porting. Most drag guys running alky run around +10, however if your bike is set up for it you could run +15 without a problem.
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