Super Jet NEED HELP: Motor trouble/question

Tmart

formerly superjet444
Location
Middle Georgia
Alright, I have a 61x/62t big bore motor and havin some problems. When I give it throttle, it hesitates and doesn't want to go. It kind of bogs and feels like something's messing with the flow of gas or something. When I try backflips and stuff, when it sits upside down for a second it gets a little water inside of it, but then I ride it around for 10 seconds approx. and the feeling of water in it goes away and it starts running 100 again. Thats normal. But this time and now it feels like there's water trapped in there somewhere and won't let go. Horrible response on the throttle and all. My thought was to check and make sure my fuel lines and make sure I'm getting enough has. I guess next I need to check the head gasket and make sure that's still good. Any opinions and suggestions on what to do are more than welcome. Thanks, Tyler

*PICS ARE ON POST #3
 
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Tmart

formerly superjet444
Location
Middle Georgia
IMG_0429.jpg IMG_2971.jpg IMG_3450.jpg IMG_5595.jpg IMG_5821.jpg IMG_6735.jpg

I haven't gotten compression numbers yet b/c I don't have the a guage handy at my house. I need some help with this though. The plugs were pretty wet, the left piston had some moisture on it. The left dome also had some dried up something on it as seen in pic 4. I figured it was something stupid like a blown oring or head gasket but that doesn't seem to be it. Any help is appreciated. Thanks, Tyler
 

Tmart

formerly superjet444
Location
Middle Georgia
Alright got some compression number. Left hole is 180 and the right hole is 160. Is that enough to make a difference? And also I forgot to add, the water coming out of the pisser when I ride is boiling hit. Like burns me through my gloves and the head is also super hot too. I don't know what else to do
 

Tmart

formerly superjet444
Location
Middle Georgia
Sounds like bad head gasket or o-ring. Is the "hot" water coming from the bypass that is tied into the low compression cylinder?
The line running from the bad cylinder connects at the bottoms of the factory headpipe. The good cylinder has a line that runs from the cylinder to one of the pissers. The other pisser is a T from the headpipe and chamber. The main oring and the orings around the domes looked perfect
 

motoman96

Banned
Location
Lodi Cali
If it's that hot, has nothing to do with the head not sealing. Big air leak causing a lean mixture, lean ='s hot, hot ='s bad bad things. Plus your compression is beyond the 10% allowable difference. You have issues
 
If there is water getting into the cylinder and not the usual amount coming from the bypass coupled with a loss of compression in said "wet" cylinder usually means lack of head sealing. Espescially when the water from the bypass is sizzling and boiling since the water isnt flowing and taking the heat with it.Also look at the piston wash on the rear piston, not a lean condition, a little rich if anything shown by the carbon buildup. And usually extreme air leak would cause runaway.I ain't no expert but pretty common.
 
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INDebtSJ

Having a VISION!
Location
Ga
I have had the same issues. Not sure if i have totally corrected mine yet but is muuuch better.
I had the waterbox hose slighty off which was causing it to hesitate some. It still wasnt right so i cleaned the internal carb filters. They were clean though. Re routed my cooling lines thinking it was running poor due to overheating. And i changed my plugs.
One of those worked and now it seemes to be brappy again. Still the one bypass is hotter than i want or remember it to be.
My compression numbers were even though.
 

Tmart

formerly superjet444
Location
Middle Georgia
I have had the same issues. Not sure if i have totally corrected mine yet but is muuuch better.
I had the waterbox hose slighty off which was causing it to hesitate some. It still wasnt right so i cleaned the internal carb filters. They were clean though. Re routed my cooling lines thinking it was running poor due to overheating. And i changed my plugs.
One of those worked and now it seemes to be brappy again. Still the one bypass is hotter than i want or remember it to be.
My compression numbers were even though.
I'm going to go through those steps and see if thats it. I have just gone through all the stupid little stuff like that over and over again and I haven't found the problem yet.

[/QUOTE]Still sounds like your head is not sealing.[/QUOTE]
I agree that the head isn't sealing b/c there's water burn marks on the piston and you can see where there was moisture inside of it and on the domes. But all 3 orings looked perfect so idk. I guess replace them? It is clear though that the head or somewhere is letting water inside.
 

McDog

Other Administrator
Staff member
Location
South Florida
Just found this. This sucks. This is why I said to buy a motor that was built by a reputable builder. I sure hope that is not the issue and it ends up being minor fix and not a dropped sleeve or worse.
 

McDog

Other Administrator
Staff member
Location
South Florida
Not a LPW motor. Paul would take care of it if it was though. Paul would probably still check it out and fix it for a reasonable price even though it isn't his motor because he is a great guy.
 

Tmart

formerly superjet444
Location
Middle Georgia
Shane, I need you or John to look at it. I can only tell of something little is wrong like orings or hoses or something are wrong. I agree with the dealer thing but money was so type and I bought it from. Good guy to deal with. The motor absolutely ripped until 2 weeks ago. We'll figure it out I hope
 
Dude it is probably something simple,dropped sleeve is pretty rare. Check exhaust gasket also. Others will disagree I'm sure, but I use Honda bond on my o-ring heads as a way to hold the o-rings during assembly and a second seal.
 
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