Viper glider build

[sxr70001]

Wow it started right up. Very impressive skills to get it all sorted out.

 

[MrSled]

It's running. Code 81 is flashing because the heated grips aren't connected yet but other than that there's no other issues. Once we get the air box installed I'll take it for a test run.

Nice work!!

 

[yamamarc]

Good job can't wait to read about the results!!

Just out of curiosity is the starter assembly in the nitro motor the same as our vipers

 

[grizztracks]

Good job can't wait to read about the results!!

Just out of curiosity is the starter assembly in the nitro motor the same as our vipers

The starter motor and gears are the same. Both engines are basically the same. I think the big difference between a stock Viper and this build is the use of the Yamaha Nytro ECU over the Cat version. Other than the ECU controlled heated grips not being adequate the Yamaha ECU has been flawless unlike the Cat version. A bonus is all the Nytro handlebar controls are being used with the Yamaha wire harness which many of us loyal Yamaha guys prefer. The big question here is with the Nytro engine and ECU installed in a Viper chassis will it pull as hard as it did in the FX chassis. If we notice a decrease in power then that most likely can be contributed to the Viper intake and exhaust but if it remains unchanged then an inferior Cat ECU will be to blame.

This build was actually started because yamakazie was interested in switching from a Nytro to a Viper after riding mine last season. He came across a reasonably priced new chassis (minus the engine , clutching and electrical system) for sale at a dealer so after talking to me about using his Nytro as a donor sled he decided this would be a cheap way to get on a Viper with the possibility of actually improving it from stock.

 

[yamakazie]

When I found this rolling chassis I knew the motor swap would be simple but my limitation would be the electrical. My lack of knowledge and desire to tackle the wiring harness lead to my friend Grizz being my first call. He was more than willing to jump in with both feet for the education. We decided sharing this build with our fellow TYers would help answer questions that have been around since 2014. Once the chassis was in my hands Grizz and I spent part of a weekend getting the motor and other mechanicals squared away then I left the harness to the genius mind of Grizz. He took a measly 5 days to have it wired up and running. I should be bringing it home next weekend to button up a few details.
I always loved the Nytro motor but was never happy with the chassis. Like Grizz stated, after riding his Viper a mere 2 miles, I knew that was the answer to my chassis problems. Thanks to him, now I have the best of both worlds. I cannot thank him enough for his help and knowledge. Without Grizz this build never would've happened. I hope you guys are a tenth as excited as I am for this SR Nytro RTX SE (Vipro) to hit the snow!

Sent from my SM-G920V using Tapatalk

 

[yamadoo]

This IS GREAT thank you both so much, will be very interesting

 

[Dusty Dan]

When I found this rolling chassis I knew the motor swap would be simple but my limitation would be the electrical. My lack of knowledge and desire to tackle the wiring harness lead to my friend Grizz being my first call. He was more than willing to jump in with both feet for the education. We decided sharing this build with our fellow TYers would help answer questions that have been around since 2014. Once the chassis was in my hands Grizz and I spent part of a weekend getting the motor and other mechanicals squared away then I left the harness to the genius mind of Grizz. He took a measly 5 days to have it wired up and running. I should be bringing it home next weekend to button up a few details.
I always loved the Nytro motor but was never happy with the chassis. Like Grizz stated, after riding his Viper a mere 2 miles, I knew that was the answer to my chassis problems. Thanks to him, now I have the best of both worlds. I cannot thank him enough for his help and knowledge. Without Grizz this build never would've happened. I hope you guys are a tenth as excited as I am for this SR Nytro RTX SE (Vipro) to hit the snow!

Sent from my SM-G920V using Tapatalk

Heck of a job guys, good on yuh!!

 

[grizztracks]

After researching how the stock Viper controls the reverse actuator it was determined that a non-ECU method would be needed. The Cat ECU sends ground signals to two separate SPDT relays (one for reverse and one for forward) and the handlebar control is a single pulse of a moment switch which the ECU receives and processes in order to toggle the relays. I came up with a couple elaborate circuits to basically replicate what the ECU does but then decided that keeping it simple may be the best approach. I want to make sure the components used are readily available so a couple of automotive SPDT relays will be utilized along with a Yamaha thumb warmer rocker switch to reverse the actuator direction. The Nytro throttle block doesn't have a separate rocker for the thumb warmer but can accept one and I had an old Vector block so I removed the switch and installed it in place of the blank and now it control the relays. The only problem with this is that there needs to be some sort of lock out in case the switch is accidentally bump while moving. I can use the brake signal as a lock out but I'm not sure if it's enough. I have a couple of other ideas also but haven't worked out the details yet and like I said I want to keep it simple.

 

[Curtis Chambers]

You could use the brake signal and a seperate relay. We use it in normal electrical circuits called electrical interlock ( instead of normal mechanical interlock or safety's) just a thought. You guys are doing an awesome job.

 

[actionjack]

Is this thread over til next season? Any updates?

 

[cannondale27]

I would be interested in wiring the reverse since would like to put entire Nytro lever and block on mine since just the lever on cat block does not work well at all.

 

[grizztracks]

I order a moment switch to replace the stupid Cat reverse switch on my Viper (not for this build). I fumble with the handlebar switch with gloves on so most of the time I end up removing them to get my fat fingers in there and even then the switch sticks so I end up fighting that too.

The moment switch I ordered is waterproof and has an LED indicator so it'll be easy to see at night. I'll probably mount it down on the counsel and get it off the bars....... maybe I'll use the old switch for an air horn!

 

[grizztracks]

I'm still waiting on the sealed relays and pigtails for the reverse circuit to be delivered but I still have the hood wiring to deal with.

Can't use the Cat hood harness with the Nytro main harness and gauge so it had to go.

The Nytro's auxiliary power plug and key switch was installed in the Viper counsel. The Viper key switch uses 3-wires with a positive starter relay control unlike the Nytro's 4-wire negative control signal so it was easier to swap them and stay consistent with the Nytro electrical system. I made a blank to cover the Cat gauge hole and to accept a Yamaha pod (most likely a Vector gauge).

Started extending the headlight, auxiliary plug and key switch wires up into the Viper hood. I think the pigtail for the Nytro gauge is long enough to reach the new pod location so that will save some splicing. The 12 volt memory wire for the Vector gauge was added and HIDs are also going in.

 

[RTX]

I would be interested in wiring the reverse since would like to put entire Nytro lever and block on mine since just the lever on cat block does not work well at all.

If you end up going this route please post pics and detailed instructions.
This is something i definately want to do to mine

 

[grizztracks]

Finished up the hood wiring and HID install. We don't have the Vector gauge yet so for now the Nytro gauge will work.