2003 Yamaha XLT 800 66e Projects - Page 3 - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts
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post #21 of 154 (permalink) Old 07-15-2019, 12:27 PM Thread Starter
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Quote:
Originally Posted by rodsatheart View Post
Took care of it. Only thing I can think of is it flagged it because of the multiple quotes. Shouldn't have though.
Gotcha, afraid I lost my post!
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post #22 of 154 (permalink) Old 07-15-2019, 12:41 PM
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At 75 and 85 for compression. I'm surprised it ran at all. That's not all do to the reeds but they contributed to it.
Have you looked at the pump on the other ski yet?
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post #23 of 154 (permalink) Old 07-15-2019, 05:20 PM Thread Starter
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It was a brand new gauge, I may not have held the throttle wide open when testing though. If I get some spare time tonight, I'll compression check the other ski just for another set of numbers. I'll do it the way I did the first ski and I will test with the throttle wide open.

My garage is too small for both ski's so unfortunately it is one ski at a time. The second ski is on the trailer outside. I was planning on tearing it down regardless so both ski's are identical in service requirements and timeline.

I hope to have requested pictures to you this evening. Do I need to separate the cylinders from the crankcase for best view? I guess they will need to be removed at some point even if I just have them honed.
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post #24 of 154 (permalink) Old 07-15-2019, 05:32 PM Thread Starter
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Carbs? CARBS!!!

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Originally Posted by Dave in DE View Post
Have you ever rebuilt a carb?
For your carbs get MIKUNI kits ONLY. Go one at a time. Carb 1 and carb 2 are different. So one at a time mark and then slowly turn in both your high and low screws. Record how many turns on each. It may be 1/2, or 5/8 of a turn. Or could be 1.5. I mark the carb body on the edge of the screw hole with a small sharp chisel and very lite tap of hammer. Then disassemble with camera Pics for reference. And let soak in the carb cleaner.(a gallon can pre purchased from auto parts store) I know Napa carries carb cleaner in cans. I'm sure most the others do to. Soak it over night works best agitation once in a while helps but not to hard. Then rinse with hose and blow dry with air if you have it. Then use carb cleaner spray to spray through every office you see. Then follow the drilled return mod under "how to's" and clean again with spray cleaner and reassemble. Reuse your old needle/seat spring.
Items needed:
2) mikuni kits
2) 1.2mm needle and seat
1) Gallon can of carb cleaner
2 or 3 cans of spray carb cleaner
1) 87.5 mikuni main jet for mod.
1) 5mm tap for mod. "Local hardware"
Mikuni kits and jet from: watcon.com for kits and needle and seat and jet.
Sbt for excelerator pump diaphragm, needle and seat, kits. "No jets"
Short answer, No. I did just rebuild a carb on a Ryobi blower but no where near as complicated as this set. I picked up two Mikuni carb kits from Bay Area Powersports. I had to return the aftermarket set to them and just exchanged for this SET that includes genuine Mikuni kits, needles and seat.
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post #25 of 154 (permalink) Old 07-15-2019, 09:36 PM
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Short answer on the cyl. Yes you'll need to remove from base to get the needed pic and clean anyway.
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post #26 of 154 (permalink) Old 07-16-2019, 03:12 PM
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Tommy, here's something you may be interested in. works well for moving around the shop and it makes a nice work cart also. dont have to lean over a wheel and fender.
https://www.pwcforum.com/general-pwc...pwc-dolly.html

Last edited by Dave in DE; 07-16-2019 at 03:14 PM.
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post #27 of 154 (permalink) Old 07-16-2019, 08:35 PM Thread Starter
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Redneck Dolly

Thanks Dave, I built some carts out of furniture dollies, works great for my needs.
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post #28 of 154 (permalink) Old 07-23-2019, 05:03 PM Thread Starter
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I'm not dead, yet, had some other things tie me up for a moment but I am back on the project(s)! Picked up some liquids today for cleaning up the motor.
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post #29 of 154 (permalink) Old 07-29-2019, 08:21 PM Thread Starter
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Cylinders and Power Valves

Finally got some work in and was able to break down the cylinders and power valves. It appears the installed power valves have already been updated. I have all screws undone, do the valves lift up out of the slot to the cylinder? I cannot get mine to budge. I have attached cylinder pictures to determine if I am sleeved or not. Thanks for the help.
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post #30 of 154 (permalink) Old 07-29-2019, 08:51 PM
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Yes both jugs are sleeved.
If you've removed the screw that holds the power valve bushing in then you may have to lightly pry up on the valve to pop it loose. Cyl walls don't appear to bad may be able to hone and put in new pistons/rings.
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