View Full Version : X2 issues
shawn_NJ
10-09-2007, 08:09 PM
Figured I would start the first problem/help me thread..... big surprise there....lol
Both of my x2s had problems at the ride this past weekend.
The 780 is just an electrical issue (will loose spark after 1sec). I think its just the 86 stop relay or the wiring for the stop relay. I think I can handle this one. Other than not starting the second day (due to spark), she ran AWESOME...no complaints other than it being LOUD!
The 750 x2 is another story. When you start it (motor hot or cold), it would just stumble all over itself....SOMETIMES! Others it would take off fine. This is only on the FIRST takeoff after starting it. Other than that, the ski rode decent all day. The pisser was rather "spitty" for lack of a better word.... meaning it had LOTS of air bubbles in the water without a good steady stream. I am thinking the head gasket might be at fault for that. But its just a guess. Thoughts? Think it could be the reeds causing the strange on again/off again "lag/stumble" on the first takeoff?
Please keep the ideas coming. I plan picking up a compression gauge Thurs night and checking both skis friday.
Figured I would start the first problem/help me thread..... big surprise there....lol
Both of my x2s had problems at the ride this past weekend.
The 780 is just an electrical issue (will loose spark after 1sec). I think its just the 86 stop relay or the wiring for the stop relay. I think I can handle this one. Other than not starting the second day (due to spark), she ran AWESOME...no complaints other than it being LOUD!
The 750 x2 is another story. When you start it (motor hot or cold), it would just stumble all over itself....SOMETIMES! Others it would take off fine. This is only on the FIRST takeoff after starting it. Other than that, the ski rode decent all day. The pisser was rather "spitty" for lack of a better word.... meaning it had LOTS of air bubbles in the water without a good steady stream. I am thinking the head gasket might be at fault for that. But its just a guess. Thoughts? Think it could be the reeds causing the strange "lag/stumble" on the first takeoff?
Please keep the ideas coming. I plan picking up a compression gauge Thurs night and checking both skis friday.Lose the stop relay, all it does is ground the coil and something else to go wrong. Sounds like head gasket, comp. test should tell you for certain. Before you pull the head, see if any nuts have lost their torque, I have been battling that and retorque every couple rides.
shawn_NJ
10-09-2007, 08:21 PM
Lose the stop relay, all it does is ground the coil and something else to go wrong. Sounds like head gasket, comp. test should tell you for certain. Before you pull the head, see if any nuts have lost their torque, I have been battling that and retorque every couple rides.
1) Stop relay is getting removed. I might swap the cdi back to a 4wire unit so I do not have to worry about it.
2) Compression test is the first order of business. Any chance a bad exhaust manifold to cylinder gasket could cause the samething? I am also picking up a torque wrench for the head job. Any suggestion on wrench size/length to fit in the small work area of the x2?
1) Stop relay is getting removed. I might swap the cdi back to a 4wire unit so I do not have to worry about it.
2) Compression test is the first order of business. Any chance a bad exhaust manifold to cylinder gasket could cause the samething? I am also picking up a torque wrench for the head job. Any suggestion on wrench size/length to fit in the small work area of the x2?3/8 drive is probably all you need for most stuff, head is 18-20 ft/lb. I doubt its the exhaust man, compression likes to force its way around the head gasket into the water jacket.
shawn_NJ
10-09-2007, 08:27 PM
3/8 drive is probably all you need for most stuff, head is 18-20 ft/lb. I doubt its the exhaust man, compression likes to force its way around the head gasket into the water jacket.
Cool, you use stock gaskets? Never had to pull one before.
Cool, you use stock gaskets? Never had to pull one before.I'm not sure what yours has, if its the thin stainless one and its wasted, I have one for you as I ended up going with a thicker copper gasket to compensate for no base gasket. Last time I had that happen on a 650, the gasket almost fell apart right at the cylinder bores.
shawn_NJ
10-09-2007, 08:36 PM
This is the ski I just bought, so I have no idea what is on it now. Unfortunatly, I will not get to work on anything until Fri. Hopefully I will be able to score one locally once I know what I am looking for.
shawn_NJ
10-11-2007, 05:59 PM
Of course it was the STOP relay that F'ed me the 2nd day of wave daze. I swapped it with a spare and it started sparking. Live and learn.... Crab did you ever wire up an 86 coil without the stupid stop relay?
Going to buy a compression gauge tonight, and start on the 750 x2 tomorrow. I think the reeds are bad and that is what it causing the "lag" but will know more tom.
BlueBreadTruck
10-11-2007, 06:30 PM
if you dont use a stop relay you will have to hold the stop button untill it dies, otherwise it will catch again....quite a pita. later model 4 wire cdis have it built in. I had similar problems, and it was water in my electrical connections....also a bad coil caused it once.
750 x2 certinally sounds like a HG. compression forcing into the waterjacket, causing bubbles, and when its off water dripping in.
Legdragger
10-11-2007, 11:57 PM
If everything is kosher in the head then I would be sure the carb is healthy and not old and needing a rebuild then check the reeds for broken or open petals. I have a set of stock petals you are welcome to if you need them.
shawn_NJ
10-12-2007, 03:52 PM
Compression is even 150/150. Carb is BRAND NEW out of the box, with a brand new n/s. The pisser "spittiness" has to be cavitation (especially in the whitewatery surf). The prop and pump looks like crap, so that might explain that.
The massive first start bog/stumble/stutter has to be the reeds or flywheel key, pulling the carb and intake manifold off now to start at the reeds.
BlueBreadTruck
10-12-2007, 04:38 PM
come to think of it, when i was running my 650 with a jetnetics flywheel i was having huge starting issues, then it would run ok....it was a sheared flywheel key
Sospikey
10-12-2007, 05:09 PM
It could be that you fuel system isn't holding pressure. Check the one-way valve at the tank while at it!
Spitting, huh?
Just replaced my HG on my X2. I lapped the head and got a new HG, torqued to 15 then to 22 lbs/ft. Now it's not spitting any more...:cool:
BlueBreadTruck
10-12-2007, 05:40 PM
your tank does not even need a one-way to operate. myth busted
shawn_NJ
10-12-2007, 06:42 PM
Pete you called it!
REEDS
Check it out, the rear cylinder reeds were NFG.
REAR cylinder bottom:
http://www.surf-mb.com/7502/rear1.JPG
REAR Cylinder top:
http://www.surf-mb.com/7502/rear2.JPG
Front cylinder bottom:
http://www.surf-mb.com/7502/front1.JPG
Front Cylinder top:
http://www.surf-mb.com/7502/front2.JPG
shawn_NJ
10-12-2007, 06:45 PM
Just replaced my HG on my X2. I lapped the head and got a new HG, torqued to 15 then to 22 lbs/ft. Now it's not spitting any more...:cool:
What was the compression #s before you lapped and swapped the HG?
shawn_NJ
10-12-2007, 06:46 PM
come to think of it, when i was running my 650 with a jetnetics flywheel i was having huge starting issues, then it would run ok....it was a sheared flywheel key
Jetinetics is not on this one. As far as I know its just a stock flywheel.
Legdragger
10-12-2007, 06:59 PM
Nice I am good for something......
shawn_NJ
10-12-2007, 07:26 PM
Are any aftermarket reeds worth the upgrade? Or should I just get a set of stockers?
VF3's are availiable. Those looked like 2 stage A/M on there now.
shawn_NJ
10-12-2007, 08:26 PM
If I am doing a entire new cage setup, its going in my big pin and not my brothers ski...lol Anyone try carbontec or boyesen's in a small pin?
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