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Pgsus
| | Posted on Friday, November 02, 2007 - 06:18 am: | 
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Interesting reading all the timing/pinging issues. My XB9 has run well for 30,000 k since I purchased it, never thought about a TPS reset as always idled at 1050 at startup and when hot ( beside did not trust the dealer here in Auckland NZ ).
Went for a ride with wife and got back and noticed left boot hot, fuel light came on a little bit earlier than normal as well. Starting had gone from one touch to a little throttle and a few turn overs.
Time to look at what is under the rivets for the timing cover.
Drilled out and found another plate directly under it with csk screws, undid these and you have another plate located by "stud boss screws"? which the csk screws attach to. The timing sensor is mounted to this plate.
Noticed timming marks on plate, but they did not line up with anything. Also noticed "pry holes" for where you insert a screw driver to lever plate clockwise or anti, very similar to an old mechanical points distributor.
Hit the starter and see the "cup" rotate under these holes.
What the hell, mark with a scribe the "bigger timing mark" where it lines up with the housing and loosen off the boss screws. start her up and move the plate, improved idle vibration ( lack of ). Stop bike and start, back to one push start.
This is fun, start and rev a bit while moving plate, find a happy medium, lock it all up take it for a ride. Slight pinging under accel at low revs. Adjust plate back and take for another ride, seems fine, also notice not as much throttle twist to cruise at 60 mph. ( Perhaps never noticed the increased throttle twist over time ).
Tap rivet holes to 5mm for screws ( Metric down under ) and very happy. Points to consider
1. Spark plug gap does affect the running of the bike, post about popping on decell.
2. The Boss bolts were not that TIGHT ( holding the timing plate) but could have been loosened by removing the outer plate csk screws? ( Does the plate come Loose over time )
3.Make sure you mark the timing marks on the housing so you can put it back.
4. DO NOT POKE ANYTHING IN THE HOLES WHILE THE BIKE IS RUNNING.
5. Ended up with plate slightly advanced about 2 deg from start.
Interesting?
One more point the sensor is electrical/inductive? but they are all not made equal, so what triggers at "static" timing tests may not be the same when in motion, something else to ponder.
Happy riding |
Interex2050
| | Posted on Monday, November 12, 2007 - 02:04 pm: |
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Great write up, thanks!
I have been meaning to try to do something similar, but have not gotten around to it. |
Pgsus
| | Posted on Thursday, November 29, 2007 - 05:54 am: |
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Bike has arrived from Auckland NZ to Adelaide Australia will be putting the ECM Spy to the test so will be able to check TPS, static timing etc, see if it makes a difference to the running timing method, keep you posted but remember a correction in one part of the equation can compensate for an error in another part. Best advice is to check all the simple things first. |
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Troubleshooting (Poor Starting/Running/Handling/Ride Issues) »
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XB Timing adjustment while running?