Super Jet Total Loss problems

[Havemanm]

I have the MSD Total Loss set-up on my Yamaha 760. It runs great on the trailer and when I first get going but once it gets hot it cuts out and then the ski stops running completely and unable to start again until cooled down. I cant seem to find troubleshooting tips for this problem. I am going to start looking into it to see if I can locate any problems but do not have alot of knowledge on this system. If you have any tips or past experiences that could help let me know.

 

[DylanS]

Damn things are always going bad
I'd just either get a new one or go back to stock to save yourself the head ache

 

[Havemanm]

Damn things are always going bad
I'd just either get a new one or go back to stock to save yourself the head ache

Replaced the pick-ups and put in a new battery and it works good again. Still planning to go back to stock though, i just ride once every couple weeks and don't need the headache.

 

[DylanS]

Replaced the pick-ups and put in a new battery and it works good again. Still planning to go back to stock though, i just ride once every couple weeks and don't need the headache.

Good to hear
Are you running the 760 in a sit down or a stand up?

 

[Havemanm]

in a 97 superjet, the one in my avatar. has 62t cases with 44m carbs and pipe, gets pretty good bottom end. I am hoping it doesn't lose to much when i take out the total loss.

 

[DylanS]

in a 97 superjet, the one in my avatar. has 62t cases with 44m carbs and pipe, gets pretty good bottom end. I am hoping it doesn't lose to much when i take out the total loss.

I run a bored 760 with similar work done to it in my EME Ariel 8
Lightened wheel, decked, 210lbs per cylinder, b pipe and what not
It just sucks that the 760 cylinders make poor bottom end
Considering switching to 927wdk motor
The total loss will probably make a noticeable difference due to adding more weight to the flywheel mostly
But you can always try to play with stock stator and wheel to help with ignition

 

[Havemanm]

I run a bored 760 with similar work done to it in my EME Ariel 8
Lightened wheel, decked, 210lbs per cylinder, b pipe and what not
It just sucks that the 760 cylinders make poor bottom end
Considering switching to 927wdk motor
The total loss will probably make a noticeable difference due to adding more weight to the flywheel mostly
But you can always try to play with stock stator and wheel to help with ignition

Did it help much when you decked the cylinder? I have light porting in mine and run 180psi on pump gas. Otherwise i have a 701 61x sitting around I may fix up this winter and test out, i dont ride enough to justify spending alot on new engines.

 

[DylanS]

Did it help much when you decked the cylinder? I have light porting in mine and run 180psi on pump gas. Otherwise i have a 701 61x sitting around I may fix up this winter and test out, i dont ride enough to justify spending alot on new engines.

Decking it helped a bit
The bad part is that porting them actually makes it worse due to design
But you'd make way better bottom end out of the SAME bore 62t or 61x cylinder no matter what

 

[cookn]

Im in ontario if you are looking to get rid of the total loss for a reasonable price

 

[Havemanm]

Im in ontario if you are looking to get rid of the total loss for a reasonable price

Ill sell it at a reasonable price when i pull it, not exactly sure when ill get around to that. It is just over a year old with pretty low hours an extra set of new pick-ups, and mounting plate. I will see what they are going for and send you a message when i sell.

 

[Havemanm]

Decking it helped a bit
The bad part is that porting them actually makes it worse due to design
But you'd make way better bottom end out of the SAME bore 62t or 61x cylinder no matter what

No doubt, I will check over the engine at the end of the season and may end up doing a rebuild anyways. In that case i might try a different set-up. Trying to keep it reliable to so i can use it multiple seasons without wrenching.

 

[Citizen]

No doubt, I will check over the engine at the end of the season and may end up doing a rebuild anyways. In that case i might try a different set-up. Trying to keep it reliable to so i can use it multiple seasons without wrenching.

I think you are setting unrealistic expectations if you hope to go a season without wrenching lol. Though I went almost 6 without doing more than 4-5 hours of total wrenching and part swapping..but that may be a record on a ski as modded as mine was.

 

[Havemanm]

I think you are setting unrealistic expectations if you hope to go a season without wrenching lol. Though I went almost 6 without doing more than 4-5 hours of total wrenching and part swapping..but that may be a record on a ski as modded as mine was.

Im not putting to many hours on it, so 3 seasons shouldn't be to much to ask of a well done engine. A few hours a season of small adjustments and maintenance is to be expected.

 

[DylanS]

Im not putting to many hours on it, so 3 seasons shouldn't be to much to ask of a well done engine. A few hours a season of small adjustments and maintenance is to be expected.

I agree, A well built engine (even a motor with lots of balls) will last many seasons if you build it well
Just some basic maintenance and you'll be fine