Possible kickback solution?

[johan]

The worst part is that why did yamaha have The pickup on the stubshaft that have movement play in it? it is sensitive and one degree can do bad things.

 

[cannondale27]

Wasn't it there on Nytro too?

 

[gvessey]

We had a 7000 and a viper both 2014s that blew the starter drive. We doubled up the power and ground from the battery to the starter on the 7000 to see if it will help, but we had a bad winter last year so the owner never got to test much, but seemed to start quicker, both had factory flashes. It seemed weird to me that the guages cut out on cranking like they weren't getting enough power, blinking I could see but not cutting out, also never looked to close but it seemed like the little red wire off the battery is the feed for the full fuel injection system (ecu,fuel pump,injectors,guages) seemed small for all it runs. (If it is the only feed)

Lots of great ideas on here, just my 2 cents,seems like others are having good luck with the EVO flashes so that seems like a good option to try as well. It's a shame because they are a good sled besides that horrible starter drive issue. Viper has been upgraded to a Sidewinder and the 7000 isn't far behind it because of this issue.

 

[Janne339]

but it seemed like the little red wire off the battery is the feed for the full fuel injection system (ecu,fuel pump,injectors,guages) seemed small for all it runs. (If it is the only feed)

Yes I notice that too... And I gonna check that up after weekend. Gonna do some testing and supply the ECU, fuel and ignition system from a second battery when fires up. Than no voltage drops because starting motor and ECU has different batteries.

 

[gvessey]

Yes I notice that too... And I gonna check that up after weekend. Gonna do some testing and supply the ECU, fuel and ignition system from a second battery when fires up. Than no voltage drops because starting motor and ECU has different batteries.

Let me know how your testing goes!

 

[Janne339]

When engine is running the generator feed the electric system very well.

But when you turn the key to start the engine, its only the little red thin cables and battery that feeds the electric system.

And when head light, thumb/hand/seat warmer are on maybe ECU (fuel/ignition system) gets wacky if voltage drops to much when the starter is running?
A battery in top condition is probably very important on the Viper.

 

[gvessey]

When engine is running the generator feed the electric system very well.

But when you turn the key to start the engine, its only the little red thin cables and battery that feeds the electric system.

And when head light, thumb/hand/seat warmer are on maybe ECU (fuel/ignition system) gets wacky if voltage drops to much when the starter is running?
A battery in top condition is probably very important on the Viper.

If memory serves me right I don't believe that wire is fused beside the battery as well, if it ever shorted between the battery and fuse box, there would be smoke, unless there is an inline somewhere there.

I'd be curious to see an amperage reading on that wire on start and running, because it seemed awfully small for everything it powers up.

 

[Pjw350]

I had a brand new 16 ltx le and sled wouldnt start on its own without a charger on it in the morning. My first trip was a weeklong and was -20F the first few days and just figured i would have cold srarting issues.had issues all week. Brought yamaha the battery said it checked out good. 2nd trip sled wouldnt start in the am. Got home took it to interstate and they said it was good with load testing it. Went to my dealer and bought a new battery. Figured what could i loose and it fixed my issue. So the original battery tested fine but didnt have enough juice to start it.

My dealer ended up reinbursing me for the battery as they didnt think it would fix my issue. But its looking like if the battery isnt 100% starting issues will happen and could this be leading to kickbacks?

 

[Janne339]

Swedish "ECU Voltage flash" Extra battery only feed the ECU.
Stock battery only supply starting motor in the video.

 

[Mike P]

Swedish "ECU Voltage flash" Extra battery only feed the ECU.

I wonder if a battery has ever been located as far away from the starter with such a small gauge wire used for electronics.

 

[Janne339]

I wonder if a battery has ever been located as far away from the starter with such a small gauge wire used for electronics.

An 12v electrician with knowledge should take a look at the whole wiring harness on the Viper. Somethings is probably wrong in the setup?

 

[grizztracks]

One difference that I've noticed between the Nytro and Viper start circuits is that the Nytro feeds a signal from the key to the ECU when in the start position so the ECU knows the starter is engaged but I don't see that with the Viper's start circuit. The Cat ECU may not know it's attempting to start the engine.

 

[cannondale27]

Swedish "ECU Voltage flash" Extra battery only feed the ECU.
Stock battery only supply starting motor in the video.

Wow! Did you chart that on data logger? That's a big difference and gauges didn't blank out like I bet ecu and fuel pum do also. Well done.

 

[Mike P]

If memory serves me right I don't believe that wire is fused beside the battery as well, if it ever shorted between the battery and fuse box, there would be smoke, unless there is an inline somewhere there.

I'd be curious to see an amperage reading on that wire on start and running, because it seemed awfully small for everything it powers up.

Correct, no fuse.

 

[Janne339]

Wow! Did you chart that on data logger? That's a big difference and gauges didn't blank out like I bet ecu and fuel pum do also. Well done.

11,9 and 12,1 volts when turn the key. Red=voltage. White=RPM

Without extra battery to ECU. This time it drops to only 8,4 volts.