superjetkev
x-h2o
- Location
- downriver, ontario CANADA
Sheared key maybe? Slipped timing is possible
Reed or carb failure?
- Thread starter MADMAT
- Start date
Fwiw, if you pull the flywheel bolt and look up into the flywheels hub, all you can see is the tip of the woodruff key… when they shear, one section follows the flywheel and looks fine while the other section stays with crank. In my experience, when the key way shears, you start getting a backfire and no start/ no run condition….due to incorrect timing.. best way to check the key is remove the flywheel..
At this point it might make sense to temporarily reinstall the cover and swap in a known good cdi ?
Then if still needed, pull the flywheel and inspect the key and swap in a known good stator…
I assume the butterfly’s both open evenly ? There was another thread by Paul1 I think out of Canada on a running issue and reed inspection… I’ll look for it…..
He didn’t list a symptom
At this point it might make sense to temporarily reinstall the cover and swap in a known good cdi ?
Then if still needed, pull the flywheel and inspect the key and swap in a known good stator…
I assume the butterfly’s both open evenly ? There was another thread by Paul1 I think out of Canada on a running issue and reed inspection… I’ll look for it…..
He didn’t list a symptom
Reed valve problem Maybe
I have a Dasa 850, twin 46 full spec, B-pipe , the package has less power than a stock 701 the manifold of the b-pipe was port match , the jetting of the carbs is very rich 14o high speed ,low speed 130,NS 2.0, spring 80 , we also have the water manifold , the plugs are lean, the engine is hot ...
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MarkWalker
Site Supporter
- Location
- Buffalo NY
As dumb as this sounds. Could it be bad fuel?
- Location
- Goodwood, ON
I’m still saying you have an electrical issue. CDI, plug boot or plug wire, maybe coil. I had a plug boot go bad. It was sudden. When I got on the throttle it ran on one cylinder.
If something in the fuel system was restricted, your plugs would be looking lean, but yours are wet like you’re getting unburnt fuel
If something in the fuel system was restricted, your plugs would be looking lean, but yours are wet like you’re getting unburnt fuel
- Location
- missouri
thats what my 550 does when hoseclamp on the expansion chamber coupler breaks. Its obvious though when you take the hood off.
Ahg I wish I would have started with the flywheel! It appears I am lucky and no damage done.
In the light I could see the crust on the flywheel bolt was dried red thread locker so I can see I did that properly. Although it is all high on the threads and I thought that was odd. I can't imagine I didn't torque it properly.
In the light I could see the crust on the flywheel bolt was dried red thread locker so I can see I did that properly. Although it is all high on the threads and I thought that was odd. I can't imagine I didn't torque it properly.
Lightly ruled it out LOL. All APPEARED to be OK!
I swear man anytime I pick a direction to chase on a ski I choose the wrong one first! Every time! Even if I purposely choose the opposite of what I actually chose it flips on me and still leads me down the wrong path first! It has been this way for 20 years! Just jet skis!
- Location
- Goodwood, ON
It can look like that when you pull the plugs, but have weak to no spark under compression
Glad you found the issue. Did the flywheel turn? Timing off?
Yep it appears so....so far.....all I know is the flywheel bolt was loose when I went to take it off. I still had to use the puller to get the flywheel off and the key and key way look great! I don't get it. Moved forward on me?