Recent content by shadow637

I have a cracked front arm on my 14 RTX (@ lower cross shaft), caught it before anything major failed luckily. Did anyone find out if the 16-17 front arm is a direct replacement for the 14-15 arm? It is considerably cheaper to purchase for some reason. If it is not I will probably just weld...

Got some great input from Dirtbikekid1998 on this. He seems to be a couple steps ahead of me with the autotune process and got me headed in the right direction.

Thanks for the help, I think I have a handle on it now. Yep, autotune is turned on. I just need to insert an autotune pressure table and populate the target A/F cells manually. Going to try to tune off of pressure, not throttle position.

I have a turbo kit on my 2014 Viper and have been running a PCV-pti for the last 2 seasons. I just installed a PC Autotune for fine tuning and ran into an issue with my map. Problem is that my current map only has the fuel and fuel(pressure) tables and does not have any A/F tables for autotune...

I tried Yamaha Tuners and Curves on my 14 RTX, didn't like either one much... My current and favorite setup I have found is the stock skis with Woodys Dually 4" carbides. I have Fox RC2 Evols on the front so I cannot comment an Cannondales re-valve but I did have him re-valve my rears and it is...

Worked awesome all winter with the stock fuel pump, larger injectors, and remapped PVC. Runs AFR's between 12-13 when out of the boost and 10.5-11 when in boost. Have the max boost set at 8psi right now. Fuel mileage is very similar to a stock Viper when trail riding, within 1/2 gal pretty...

Ethanol is just grain alcohol, like vodka, but it has a little gas blended in it to make it undrinkable. If ethanol is eating up the seals in their fuel systems you better not drink any alcohol! Methanol is wood alcohol and is very corrosive and poisonous. I would guess they are either burning...

I know all about ethanol, we have had it in our fuel here in MN since around 2003. You rarely hear about any fuel related issues anymore as all vehicles since the early 2000's are built with systems compatible with it. Issues come up when it is used in older vehicles that have fuel systems...

Ethanol actually increases the octane rating of gas, E85 (85% ethanol/15% gas) has an octane rating of approx 105. Higher octane fuel resists detonation because it does not burn as easily... Putting higher octane premium in an engine designed to run on 87 octane is a complete waste of $$ and...

I agree, I tried tuners on my 14 RTX and hated it. Ended up throwing on a pair of Slim Jim Dooly carbides on the stock skis and it steers great with very minimal to no darting. I do agree though, ski alignment is huge. Needs to be toed out around 1/4".

You could give the PPP spring a shot, it has a bit less rate then the OPO with the same preload. My thinking is- try to get the rpm close with the weights in the middle of their adj range and have room to fine tune either direction.

Not sure if Yamaha has a dual rate but the Cat part # is 2704-229, around $38 if I remember correctly.

Thanks, I will give the stock helix a try. I also have a couple in between, just need time to do some quality testing.

I had the same exact results as fasteddie15x on both my 14's.

I started with a B-S-B stock spring with 1 magnet in each position and it was under-reving pretty bad with horrible throttle response so I thru in a G-W-G and it was better but still low on rpm. My selection of Yamaha primary springs is a bit limited (ran Drag-n-Fly weights/springs in my Nytro...