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I am in the dark here, I have read that the timing may be marked wrong on 03 700's. Can someone explain how to check it? If its off, how do I fix it? I know you need a degree wheel, I can get one....

My sled has always been a pig...never saw 11mpg.. more like 8-10. I have taken it easy on it just to see what I could get in one tank up in Canada... 9.

:banghead:
 

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TTT for ya.
Anyone here do their own timing advance to an OEM set-up? :dunno:
I'm curious as well.
 

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I have used a timing light attach it to a car battery or MC battery and clip the plug lead fire the sled and expose the timing hole on the mag side most of the 2 strokes I have done are read @ 3000 rpm..

then the work begins if timing is off or you wana adjust it

Pull the pipe pull the recoil pull the fly wheel loosen mag screws and turn it counter clock wise to advance timing and clock wise to retard timing..

put it back together and retest with timing light til the needed timing is set..
 

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Originally posted by snowman04976@Sep 6 2005, 11:34 AM
I am in the dark here, I have read that the timing may be marked wrong on 03 700's.  Can someone explain how to check it?  If its off, how do I fix it?  I know you need a degree wheel, I can get one.... 

My sled has always been a pig...never saw 11mpg.. more like 8-10.  I have taken it easy on it just to see what I could get in one tank up in Canada...  9.

:banghead:
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[/quote]

You need a dial indicator and a degree wheel.
Determine TDC on the mag side piston with the indicator and degree wheel and compare against the timing mark on the flywheel.

The 03 700's can have the needle lowered 1/2 clip easily without running lean, provided you have not modded the sled. This will help your MPG.
 

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is the 98 xcr a valve motor?? Not sure if it matters though

I would expect the timing to be the same as the 2000 xcr 800
since they are basically the same motor with lager cylinder holes

I am about to do my XCR up 2 degrees and the book states
factory timing is set to

26 degrees BTDC @ 3500 rpm with a 1.5 degree
variance with the TPS unplugged..

if ya can't find the timing info call the local dealer and ask what
the book states for the 98 xcr 700





Originally posted by bimmer1@Sep 19 2005, 03:03 PM
Do you know what the timing should be for a 98 xcr 700?

Bimmer1
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Originally posted by RogerBzXCR@Sep 19 2005, 07:15 PM
is the 98 xcr a valve motor?? Not sure if it matters though

I would expect the timing to be the same as the 2000 xcr 800
since they are basically the same motor with lager cylinder holes

I am about to do my XCR up 2 degrees and the book states
factory timing is set to

26 degrees BTDC @ 3500 rpm with a 1.5 degree
variance with the TPS unplugged..

if ya can't find the timing info call the local dealer and ask what
the book states for the 98 xcr 700
<div align="right">index.php?act=findpost&pid=882590
[/quote]
98 xcr is not a valve motor the 99 is thgough
 

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98 xcr 700

17 deg @ 3500 +/- 1.5 with engine at room temperature

1.78 mm btdc acceptable within 1.49 - 2.11 mm

or .070" btdc acceptable within .059 - .087 "

This gives 18 degrees at 8000 rpm (ideal)

Basically you use a dial indicator (Yamaha says use a wooden dowel in spark plug hole) and zero it for tdc. turn crank back to get 1.78 mm- btdc. Then you mark - I use a spring center punch - on the flywheel for 17 degrees where your timing arrow lines up. You will find your accurate timing marks different than the factory ones. Use a timing light to adjust to your mark. you could paint the range on fly wheel if you like (1.49 - 2.11) I like metric because it's easier to measure over small dimensions. I know some guys use a vernier digital caliper to sit on plug hole and use the metal rod to find tdc. I think it is too risky to mis measure.

Different areas of Polaris tuneup reference data sheets reference 1500 rpm for timing. I don't think the electronic ignition changes timing between 1500 and 4000.

good Luck, it's easy if you see it done once. Bob :div20:
 
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